CN108940283A - A kind of support type efficient hydrogenation catalyst and preparation method thereof - Google Patents
A kind of support type efficient hydrogenation catalyst and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of support type efficient hydrogenation catalysts, including below according to the raw material of parts by weight: 15-20 parts of pretreated carrier, 4-7 parts of metal precursor, 14-24 parts of deionized water；Wherein the pretreated carrier is by carrying out sour processing to na-montmorillonite and auxiliary ultrasonic microwave combination effect is prepared.The invention also discloses the preparation methods of the catalyst.Catalyst prepared by the present invention has excellent catalytic hydrogenation property; metal precursor load capacity can be increased by pretreated carrier; the acidic site that can be used for promoting catalytic performance is introduced simultaneously; pass through vacuum impregnation and the mutual cooperation kept the temperature under atmosphere of hydrogen protection; effectively avoid the reunion of active component; and then be conducive to improve the activity of catalyst, it can be used in catalytic hydrogenation reaction, have a vast market foreground.
Description
Technical field
The present invention relates to chemical field, specifically a kind of support type efficient hydrogenation catalyst and preparation method thereof.
Background technique
With the continuous development of society, Chemical Engineering Technology is constantly progressive, more and more catalyst in Chemical Manufacture,
Significant contribution has been made in progress for society.Wherein, hydrogenation catalyst is that a kind of compound is urged with what is used when hydrogen addition
Agent, in medicine, pesticide, cosmetics and washing health product, bonding agent, oil field chemical, synthetic lubricant fluid, chemicals for automobile
Equal fields, which suffer from, to be widely applied.
Hydrogenation catalyst generallys use infusion process and is prepared, cheap since preparation method is simple, is to pass through base
It is impregnated into the form of salting liquid on porous carrier in active component and penetrates into inner surface and form loaded catalyst.But
When preparing hydrogenation catalyst using conventional impregnation method, due to using common inorganic oxide as carrier, cause to be catalyzed
The activity of agent is not often high, meanwhile, it is easy to appear sintering when carrying out high-temperature roasting, active component is caused to be easy to reunite one
It rises, to reduce the activity of catalyst.
Summary of the invention
It is efficient the object of the invention is to provide a kind of support type to solve above-mentioned problems of the prior art
Hydrogenation catalyst and preparation method thereof is avoided using common inorganic oxide as carrier, but is used to na-montmorillonite
Carry out the pretreated carrier of acid processing and the preparation of auxiliary ultrasonic microwave combination effect；Meanwhile by vacuum impregnation and in hydrogen
The mutual cooperation kept the temperature under atmosphere protection, effectively avoids the reunion of active component, and then is conducive to improve the work of catalyst
Property, it can be used in catalytic hydrogenation reaction, have a vast market foreground.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of support type efficient hydrogenation catalyst, including below according to the raw material of parts by weight: 15-20 parts of pretreated carrier,
4-7 parts of metal precursor, 14-24 parts of deionized water；
Wherein, the preparation method of the pretreated carrier is to weigh suitable na-montmorillonite and be crushed to 400 mesh, then plus
The sulfuric acid solution that the concentration for entering 8 times of volumes is 0.15mol/L carries out uniformly mixed, is re-fed into ultrasonic microwave composite reaction instrument
Ultrasonic microwave combined treatment 20min is carried out at 78 DEG C, centrifugation 15min is then carried out with the rate of 3000r/min, in removing
Vacuum drying 48h is carried out after layer clear liquid at 60 DEG C to get the pretreated carrier；By carrying out acid processing simultaneously to na-montmorillonite
Auxiliary ultrasonic microwave combination effect, effectively increases the peeling effect of na-montmorillonite, advantageously forms before can increasing metal
The laminated structure of body load area is driven, while logical peracid treatment introduces the acidic site that can be used for promoting catalytic performance, effectively improves
Catalytic activity.
Further, the support type efficient hydrogenation catalyst includes the following raw material according to parts by weight: pretreated carrier
18 parts, 6 parts of metal precursor, 16 parts of deionized water.
Further, the ultrasonic microwave combined treatment condition are as follows: ultrasonic frequency 30kHz, ultrasonic power are
50-70W, microwave frequency 1000MHz, microwave power 50-70W.
Further, the metal precursor is six nitric hydrate copper, Nickelous nitrate hexahydrate, cabaltous nitrate hexahydrate or six water
Close one of cerous nitrate or a variety of combinations.
A kind of preparation method of support type efficient hydrogenation catalyst, this method specifically includes the following steps:
1) pretreated carrier is weighed according to parts by weight to carry out being ground to 450 mesh, obtain material A, it is spare；
2) metal precursor and deionized water are weighed according to parts by weight, be sent into ultrasonic cell disruptor after mixing
Ultrasonic treatment 30min is carried out, mixture B is obtained；
3) material A obtained in step 1) is warming up to 525 DEG C under nitrogen atmosphere protection with the heating rate of 3 DEG C/min
Heat preservation 4h is carried out, room temperature is then down to the rate of temperature fall of 5 DEG C/min, then is ground to 500 mesh, obtains material C；
4) material C obtained in step 3) is uniformly mixed with mixture B obtained in step 2), is placed in vacuum tank simultaneously
It is evacuated to 50Pa and carries out vacuum impregnation 4h, obtain mixture D；By vacuum impregnation, dipping effect is effectively increased, is conducive to mention
The catalytic hydrogenation activity of high catalyst, while reducing dip time, be conducive to improve production efficiency；
5) mixture D obtained in step 4) is filtered to remove liquid, then carries out vacuum drying 4h at 70 DEG C, obtain mixture
E；
6) mixture E obtained in step 5) is warming up to 555 DEG C under atmosphere of hydrogen protection and carries out heat preservation 2h, then dropped
To room temperature to get；By being kept the temperature in the case where atmosphere of hydrogen is protected, effectively prevent roast in air atmosphere being easy to appear
The reunion of active component is conducive to the activity for improving catalyst.
Further, in step 2), the ultrasonic power of the ultrasonic treatment is 80W；The frequency of the ultrasonic treatment is
20kHz；The temperature of the ultrasonic treatment is 30 DEG C.
Further, in step 3), the purity of the nitrogen is 99.99%.
Further, in step 6), the heating rate is 1 DEG C/min；The rate of temperature fall is 2 DEG C/min；Pass through control
System heating and rate of temperature fall further effectively prevent active component reunion, are conducive to the activity for improving catalyst.
The support type efficient hydrogenation catalyst is preparing the purposes in hydrogenation catalyst.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1) catalyst prepared by the present invention has excellent catalytic hydrogenation property, by carrying out sour processing to na-montmorillonite
And auxiliary ultrasonic microwave combination effect forms the laminated structure that can increase metal precursor load area, while logical peracid treatment
The acidic site that can be used for promoting catalytic performance is introduced, catalytic activity is effectively increased；
2) present invention is played collaboration and is increased by vacuum impregnation and the mutual cooperation kept the temperature under atmosphere of hydrogen protection
The effect of effect can effectively improve the catalytic activity of catalyst；It is kept the temperature under atmosphere of hydrogen protection by then passing through, effectively
The reunion of the active component when air atmosphere is roasted is avoided, and then is conducive to improve the activity of catalyst；
3) present invention further effectively prevents active component caused by sintering phenomenon by control heating and rate of temperature fall
Reunite, is conducive to the activity for improving catalyst, can be used in catalytic hydrogenation reaction, have a vast market foreground.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.The present embodiment is based on the technical solution of the present invention
Implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention be not limited to it is following
Embodiment.
Embodiment 1
A kind of support type efficient hydrogenation catalyst, including below according to the raw material of parts by weight: 15 parts of pretreated carrier, metal
4 parts of presoma, 14 parts of deionized water；
Wherein, the metal precursor is Nickelous nitrate hexahydrate；The preparation method of the pretreated carrier is to weigh in right amount
Na-montmorillonite be crushed to 400 mesh, the sulfuric acid solution that the concentration that 8 times of volumes are then added is 0.15mol/L mix
It is even, be re-fed into ultrasonic microwave composite reaction instrument at 78 DEG C progress ultrasonic microwave combined treatment 20min, then with
The rate of 3000r/min carries out centrifugation 15min, carries out vacuum drying 48h at 60 DEG C after removing supernatant liquor to get the pre- place
Manage carrier；The ultrasonic microwave combined treatment condition are as follows: ultrasonic frequency 30kHz, ultrasonic power 50W, Microwave Frequency
Rate is 1000MHz, microwave power 50W；
By carrying out acid processing and auxiliary ultrasonic microwave combination effect to na-montmorillonite, sodium Ji Mengtuo is effectively increased
The peeling effect of stone advantageously forms the laminated structure that can increase metal precursor load area, while logical peracid treatment introduces
The acidic site that can be used for promoting catalytic performance, effectively increases catalytic activity.
In the present embodiment, the preparation method of the support type efficient hydrogenation catalyst, this method specifically includes the following steps:
1) pretreated carrier is weighed according to parts by weight to carry out being ground to 450 mesh, obtain material A, it is spare；
2) metal precursor and deionized water are weighed according to parts by weight, be sent into ultrasonic cell disruptor after mixing
Ultrasonic treatment 30min is carried out, mixture B is obtained；
Wherein, the ultrasonic power of the ultrasonic treatment is 80W；The frequency of the ultrasonic treatment is 20kHz；At the ultrasound
The temperature of reason is 30 DEG C；By ultrasonic treatment, material dispersion effect is effectively increased, and then is conducive to improve dipping effect, is had
Conducive to the activity for improving catalyst；
3) by material A obtained in step 1) purity be 99.99% nitrogen atmosphere protection under with the heating of 3 DEG C/min
Rate is warming up to 525 DEG C and carries out heat preservation 4h, is then down to room temperature with the rate of temperature fall of 5 DEG C/min, then is ground to 500 mesh, obtains object
Expect C；
4) material C obtained in step 3) is uniformly mixed with mixture B obtained in step 2), is placed in vacuum tank simultaneously
It is evacuated to 50Pa and carries out vacuum impregnation 4h, obtain mixture D；By vacuum impregnation, dipping effect is effectively increased, is conducive to mention
The catalytic hydrogenation activity of high catalyst, while reducing dip time, be conducive to improve production efficiency；
5) mixture D obtained in step 4) is filtered to remove liquid, then carries out vacuum drying 4h at 70 DEG C, obtain mixture
E；
6) mixture E obtained in step 5) is warming up to 555 under atmosphere of hydrogen protection with the heating rate of 1 DEG C/min
DEG C carry out heat preservation 2h, then with the rate of temperature fall of 2 DEG C/min be down to room temperature to get；By being protected in the case where atmosphere of hydrogen is protected
Temperature effectively prevents carrying out the sintering phenomenon that roasting is easy to appear in air atmosphere, effectively prevents the reunion of active component, have
Conducive to the activity for improving catalyst；By control heating and rate of temperature fall, further effectively prevent living caused by sintering phenomenon
Property component reunite, be conducive to improve catalyst activity.
Embodiment 2
A kind of support type efficient hydrogenation catalyst, including below according to the raw material of parts by weight: 20 parts of pretreated carrier, metal
7 parts of presoma, 24 parts of deionized water；
Wherein, the metal precursor is Nickelous nitrate hexahydrate；The preparation method of the pretreated carrier is to weigh in right amount
Na-montmorillonite be crushed to 400 mesh, the sulfuric acid solution that the concentration that 8 times of volumes are then added is 0.15mol/L mix
It is even, be re-fed into ultrasonic microwave composite reaction instrument at 78 DEG C progress ultrasonic microwave combined treatment 20min, then with
The rate of 3000r/min carries out centrifugation 15min, carries out vacuum drying 48h at 60 DEG C after removing supernatant liquor to get the pre- place
Manage carrier；The ultrasonic microwave combined treatment condition are as follows: ultrasonic frequency 30kHz, ultrasonic power 70W, Microwave Frequency
Rate is 1000MHz, microwave power 70W；
By carrying out acid processing and auxiliary ultrasonic microwave combination effect to na-montmorillonite, sodium Ji Mengtuo is effectively increased
The peeling effect of stone advantageously forms the laminated structure that can increase metal precursor load area, while logical peracid treatment introduces
The acidic site that can be used for promoting catalytic performance, effectively increases catalytic activity.
In the present embodiment, the preparation method of the support type efficient hydrogenation catalyst, this method specifically includes the following steps:
1) pretreated carrier is weighed according to parts by weight to carry out being ground to 450 mesh, obtain material A, it is spare；
2) metal precursor and deionized water are weighed according to parts by weight, be sent into ultrasonic cell disruptor after mixing
Ultrasonic treatment 30min is carried out, mixture B is obtained；
Wherein, the ultrasonic power of the ultrasonic treatment is 80W；The frequency of the ultrasonic treatment is 20kHz；At the ultrasound
The temperature of reason is 30 DEG C；By ultrasonic treatment, material dispersion effect is effectively increased, and then is conducive to improve dipping effect, is had
Conducive to the activity for improving catalyst；
3) by material A obtained in step 1) purity be 99.99% nitrogen atmosphere protection under with the heating of 3 DEG C/min
Rate is warming up to 525 DEG C and carries out heat preservation 4h, is then down to room temperature with the rate of temperature fall of 5 DEG C/min, then is ground to 500 mesh, obtains object
Expect C；
4) material C obtained in step 3) is uniformly mixed with mixture B obtained in step 2), is placed in vacuum tank simultaneously
It is evacuated to 50Pa and carries out vacuum impregnation 4h, obtain mixture D；By vacuum impregnation, dipping effect is effectively increased, is conducive to mention
The catalytic hydrogenation activity of high catalyst, while reducing dip time, be conducive to improve production efficiency；
5) mixture D obtained in step 4) is filtered to remove liquid, then carries out vacuum drying 4h at 70 DEG C, obtain mixture
E；
6) mixture E obtained in step 5) is warming up to 555 under atmosphere of hydrogen protection with the heating rate of 1 DEG C/min
DEG C carry out heat preservation 2h, then with the rate of temperature fall of 2 DEG C/min be down to room temperature to get；By being protected in the case where atmosphere of hydrogen is protected
Temperature effectively prevents carrying out the sintering phenomenon that roasting is easy to appear in air atmosphere, effectively prevents the reunion of active component, have
Conducive to the activity for improving catalyst；By control heating and rate of temperature fall, further effectively prevent living caused by sintering phenomenon
Property component reunite, be conducive to improve catalyst activity.
Embodiment 3
A kind of support type efficient hydrogenation catalyst, including below according to the raw material of parts by weight: 17.5 parts of pretreated carrier, gold
Belong to 5.5 parts of presoma, 19 parts of deionized water；
Wherein, the metal precursor is Nickelous nitrate hexahydrate；The preparation method of the pretreated carrier is to weigh in right amount
Na-montmorillonite be crushed to 400 mesh, the sulfuric acid solution that the concentration that 8 times of volumes are then added is 0.15mol/L mix
It is even, be re-fed into ultrasonic microwave composite reaction instrument at 78 DEG C progress ultrasonic microwave combined treatment 20min, then with
The rate of 3000r/min carries out centrifugation 15min, carries out vacuum drying 48h at 60 DEG C after removing supernatant liquor to get the pre- place
Manage carrier；The ultrasonic microwave combined treatment condition are as follows: ultrasonic frequency 30kHz, ultrasonic power 60W, Microwave Frequency
Rate is 1000MHz, microwave power 60W；
By carrying out acid processing and auxiliary ultrasonic microwave combination effect to na-montmorillonite, sodium Ji Mengtuo is effectively increased
The peeling effect of stone advantageously forms the laminated structure that can increase metal precursor load area, while logical peracid treatment introduces
The acidic site that can be used for promoting catalytic performance, effectively increases catalytic activity.
In the present embodiment, the preparation method of the support type efficient hydrogenation catalyst, this method specifically includes the following steps:
1) pretreated carrier is weighed according to parts by weight to carry out being ground to 450 mesh, obtain material A, it is spare；
2) metal precursor and deionized water are weighed according to parts by weight, be sent into ultrasonic cell disruptor after mixing
Ultrasonic treatment 30min is carried out, mixture B is obtained；
Wherein, the ultrasonic power of the ultrasonic treatment is 80W；The frequency of the ultrasonic treatment is 20kHz；At the ultrasound
The temperature of reason is 30 DEG C；By ultrasonic treatment, material dispersion effect is effectively increased, and then is conducive to improve dipping effect, is had
Conducive to the activity for improving catalyst；
3) by material A obtained in step 1) purity be 99.99% nitrogen atmosphere protection under with the heating of 3 DEG C/min
Rate is warming up to 525 DEG C and carries out heat preservation 4h, is then down to room temperature with the rate of temperature fall of 5 DEG C/min, then is ground to 500 mesh, obtains object
Expect C；
4) material C obtained in step 3) is uniformly mixed with mixture B obtained in step 2), is placed in vacuum tank simultaneously
It is evacuated to 50Pa and carries out vacuum impregnation 4h, obtain mixture D；By vacuum impregnation, dipping effect is effectively increased, is conducive to mention
The catalytic hydrogenation activity of high catalyst, while reducing dip time, be conducive to improve production efficiency；
5) mixture D obtained in step 4) is filtered to remove liquid, then carries out vacuum drying 4h at 70 DEG C, obtain mixture
E；
6) mixture E obtained in step 5) is warming up to 555 under atmosphere of hydrogen protection with the heating rate of 1 DEG C/min
DEG C carry out heat preservation 2h, then with the rate of temperature fall of 2 DEG C/min be down to room temperature to get；By being protected in the case where atmosphere of hydrogen is protected
Temperature effectively prevents carrying out the sintering phenomenon that roasting is easy to appear in air atmosphere, effectively prevents the reunion of active component, have
Conducive to the activity for improving catalyst；By control heating and rate of temperature fall, further effectively prevent living caused by sintering phenomenon
Property component reunite, be conducive to improve catalyst activity.
Embodiment 4
A kind of support type efficient hydrogenation catalyst, including below according to the raw material of parts by weight: 18 parts of pretreated carrier, metal
6 parts of presoma, 16 parts of deionized water；
Wherein, the metal precursor is Nickelous nitrate hexahydrate；The preparation method of the pretreated carrier is to weigh in right amount
Na-montmorillonite be crushed to 400 mesh, the sulfuric acid solution that the concentration that 8 times of volumes are then added is 0.15mol/L mix
It is even, be re-fed into ultrasonic microwave composite reaction instrument at 78 DEG C progress ultrasonic microwave combined treatment 20min, then with
The rate of 3000r/min carries out centrifugation 15min, carries out vacuum drying 48h at 60 DEG C after removing supernatant liquor to get the pre- place
Manage carrier；The ultrasonic microwave combined treatment condition are as follows: ultrasonic frequency 30kHz, ultrasonic power 60W, Microwave Frequency
Rate is 1000MHz, microwave power 60W；
By carrying out acid processing and auxiliary ultrasonic microwave combination effect to na-montmorillonite, sodium Ji Mengtuo is effectively increased
The peeling effect of stone advantageously forms the laminated structure that can increase metal precursor load area, while logical peracid treatment introduces
The acidic site that can be used for promoting catalytic performance, effectively increases catalytic activity.
In the present embodiment, the preparation method of the support type efficient hydrogenation catalyst, this method specifically includes the following steps:
1) pretreated carrier is weighed according to parts by weight to carry out being ground to 450 mesh, obtain material A, it is spare；
2) metal precursor and deionized water are weighed according to parts by weight, be sent into ultrasonic cell disruptor after mixing
Ultrasonic treatment 30min is carried out, mixture B is obtained；
Wherein, the ultrasonic power of the ultrasonic treatment is 80W；The frequency of the ultrasonic treatment is 20kHz；At the ultrasound
The temperature of reason is 30 DEG C；By ultrasonic treatment, material dispersion effect is effectively increased, and then is conducive to improve dipping effect, is had
Conducive to the activity for improving catalyst；
3) by material A obtained in step 1) purity be 99.99% nitrogen atmosphere protection under with the heating of 3 DEG C/min
Rate is warming up to 525 DEG C and carries out heat preservation 4h, is then down to room temperature with the rate of temperature fall of 5 DEG C/min, then is ground to 500 mesh, obtains object
Expect C；
4) material C obtained in step 3) is uniformly mixed with mixture B obtained in step 2), is placed in vacuum tank simultaneously
It is evacuated to 50Pa and carries out vacuum impregnation 4h, obtain mixture D；By vacuum impregnation, dipping effect is effectively increased, is conducive to mention
The catalytic hydrogenation activity of high catalyst, while reducing dip time, be conducive to improve production efficiency；
5) mixture D obtained in step 4) is filtered to remove liquid, then carries out vacuum drying 4h at 70 DEG C, obtain mixture
E；
6) mixture E obtained in step 5) is warming up to 555 under atmosphere of hydrogen protection with the heating rate of 1 DEG C/min
DEG C carry out heat preservation 2h, then with the rate of temperature fall of 2 DEG C/min be down to room temperature to get；By being protected in the case where atmosphere of hydrogen is protected
Temperature effectively prevents carrying out the sintering phenomenon that roasting is easy to appear in air atmosphere, effectively prevents the reunion of active component, have
Conducive to the activity for improving catalyst；By control heating and rate of temperature fall, further effectively prevent living caused by sintering phenomenon
Property component reunite, be conducive to improve catalyst activity.
Embodiment 5
A kind of support type efficient hydrogenation catalyst, including below according to the raw material of parts by weight: 18 parts of pretreated carrier, metal
6 parts of presoma, 16 parts of deionized water；
Wherein, the metal precursor is Nickelous nitrate hexahydrate；The preparation method of the pretreated carrier is to weigh in right amount
Na-montmorillonite be crushed to 400 mesh, the sulfuric acid solution that the concentration that 8 times of volumes are then added is 0.15mol/L mix
It is even, be re-fed into ultrasonic microwave composite reaction instrument at 78 DEG C progress ultrasonic microwave combined treatment 20min, then with
The rate of 3000r/min carries out centrifugation 15min, carries out vacuum drying 48h at 60 DEG C after removing supernatant liquor to get the pre- place
Manage carrier；The ultrasonic microwave combined treatment condition are as follows: ultrasonic frequency 30kHz, ultrasonic power 50W, Microwave Frequency
Rate is 1000MHz, microwave power 50W；
By carrying out acid processing and auxiliary ultrasonic microwave combination effect to na-montmorillonite, sodium Ji Mengtuo is effectively increased
The peeling effect of stone advantageously forms the laminated structure that can increase metal precursor load area, while logical peracid treatment introduces
The acidic site that can be used for promoting catalytic performance, effectively increases catalytic activity.
In the present embodiment, the preparation method of the support type efficient hydrogenation catalyst, this method specifically includes the following steps:
1) pretreated carrier is weighed according to parts by weight to carry out being ground to 450 mesh, obtain material A, it is spare；
2) metal precursor and deionized water are weighed according to parts by weight, be sent into ultrasonic cell disruptor after mixing
Ultrasonic treatment 30min is carried out, mixture B is obtained；
Wherein, the ultrasonic power of the ultrasonic treatment is 80W；The frequency of the ultrasonic treatment is 20kHz；At the ultrasound
The temperature of reason is 30 DEG C；By ultrasonic treatment, material dispersion effect is effectively increased, and then is conducive to improve dipping effect, is had
Conducive to the activity for improving catalyst；
3) by material A obtained in step 1) purity be 99.99% nitrogen atmosphere protection under with the heating of 3 DEG C/min
Rate is warming up to 525 DEG C and carries out heat preservation 4h, is then down to room temperature with the rate of temperature fall of 5 DEG C/min, then is ground to 500 mesh, obtains object
Expect C；
4) material C obtained in step 3) is uniformly mixed with mixture B obtained in step 2), is placed in vacuum tank simultaneously
It is evacuated to 50Pa and carries out vacuum impregnation 4h, obtain mixture D；By vacuum impregnation, dipping effect is effectively increased, is conducive to mention
The catalytic hydrogenation activity of high catalyst, while reducing dip time, be conducive to improve production efficiency；
5) mixture D obtained in step 4) is filtered to remove liquid, then carries out vacuum drying 4h at 70 DEG C, obtain mixture
E；
6) mixture E obtained in step 5) is warming up to 555 under atmosphere of hydrogen protection with the heating rate of 1 DEG C/min
DEG C carry out heat preservation 2h, then with the rate of temperature fall of 2 DEG C/min be down to room temperature to get；By being protected in the case where atmosphere of hydrogen is protected
Temperature effectively prevents carrying out the sintering phenomenon that roasting is easy to appear in air atmosphere, effectively prevents the reunion of active component, have
Conducive to the activity for improving catalyst；By control heating and rate of temperature fall, further effectively prevent living caused by sintering phenomenon
Property component reunite, be conducive to improve catalyst activity.
Embodiment 6
A kind of support type efficient hydrogenation catalyst, including below according to the raw material of parts by weight: 18 parts of pretreated carrier, metal
6 parts of presoma, 16 parts of deionized water；
Wherein, the metal precursor is Nickelous nitrate hexahydrate；The preparation method of the pretreated carrier is to weigh in right amount
Na-montmorillonite be crushed to 400 mesh, the sulfuric acid solution that the concentration that 8 times of volumes are then added is 0.15mol/L mix
It is even, be re-fed into ultrasonic microwave composite reaction instrument at 78 DEG C progress ultrasonic microwave combined treatment 20min, then with
The rate of 3000r/min carries out centrifugation 15min, carries out vacuum drying 48h at 60 DEG C after removing supernatant liquor to get the pre- place
Manage carrier；The ultrasonic microwave combined treatment condition are as follows: ultrasonic frequency 30kHz, ultrasonic power 70W, Microwave Frequency
Rate is 1000MHz, microwave power 70W；
By carrying out acid processing and auxiliary ultrasonic microwave combination effect to na-montmorillonite, sodium Ji Mengtuo is effectively increased
The peeling effect of stone advantageously forms the laminated structure that can increase metal precursor load area, while logical peracid treatment introduces
The acidic site that can be used for promoting catalytic performance, effectively increases catalytic activity.
In the present embodiment, the preparation method of the support type efficient hydrogenation catalyst, this method specifically includes the following steps:
1) pretreated carrier is weighed according to parts by weight to carry out being ground to 450 mesh, obtain material A, it is spare；
2) metal precursor and deionized water are weighed according to parts by weight, be sent into ultrasonic cell disruptor after mixing
Ultrasonic treatment 30min is carried out, mixture B is obtained；
Wherein, the ultrasonic power of the ultrasonic treatment is 80W；The frequency of the ultrasonic treatment is 20kHz；At the ultrasound
The temperature of reason is 30 DEG C；By ultrasonic treatment, material dispersion effect is effectively increased, and then is conducive to improve dipping effect, is had
Conducive to the activity for improving catalyst；
3) by material A obtained in step 1) purity be 99.99% nitrogen atmosphere protection under with the heating of 3 DEG C/min
Rate is warming up to 525 DEG C and carries out heat preservation 4h, is then down to room temperature with the rate of temperature fall of 5 DEG C/min, then is ground to 500 mesh, obtains object
Expect C；
4) material C obtained in step 3) is uniformly mixed with mixture B obtained in step 2), is placed in vacuum tank simultaneously
It is evacuated to 50Pa and carries out vacuum impregnation 4h, obtain mixture D；By vacuum impregnation, dipping effect is effectively increased, is conducive to mention
The catalytic hydrogenation activity of high catalyst, while reducing dip time, be conducive to improve production efficiency；
5) mixture D obtained in step 4) is filtered to remove liquid, then carries out vacuum drying 4h at 70 DEG C, obtain mixture
E；
6) mixture E obtained in step 5) is warming up to 555 under atmosphere of hydrogen protection with the heating rate of 1 DEG C/min
DEG C carry out heat preservation 2h, then with the rate of temperature fall of 2 DEG C/min be down to room temperature to get；By being protected in the case where atmosphere of hydrogen is protected
Temperature effectively prevents carrying out the sintering phenomenon that roasting is easy to appear in air atmosphere, effectively prevents the reunion of active component, have
Conducive to the activity for improving catalyst；By control heating and rate of temperature fall, further effectively prevent living caused by sintering phenomenon
Property component reunite, be conducive to improve catalyst activity.
Comparative example 1
Compared with Example 4, except the vacuum impregnation in step 4) is changed to normal pressure dipping 4h, other are same as Example 4.
Comparative example 2
Compared with Example 4, except the atmosphere of hydrogen in step 6) is changed to air atmosphere, other are same as Example 4.
Comparative example 3
Compared with Example 4, except the vacuum impregnation in step 4) being changed to normal pressure dipping 4h and by the hydrogen in step 6)
Atmosphere is changed to air atmosphere, other are same as Example 4.
Comparative example 4
18 parts of 450 mesh na-montmorillonites, 6 parts of Nickelous nitrate hexahydrate, 16 parts of deionized water are weighed according to parts by weight,
Loaded catalyst is prepared according to conventional impregnation method.
Performance test
Catalytic performance detection is carried out to the catalyst of the preparation of embodiment 4 and comparative example 1-4, specific method is by 3.5mm
Be put into 0.12g catalyst among the steel pipe of internal diameter, then fill up quartz sand in the steel pipe of catalyst two sides, by steel pipe with
The rate of 40mL/min, which is continually fed into hydrogen and is warming up to 600 DEG C with the rate of 15 DEG C/min, carries out reduction 50min, then cools down
To 100 DEG C, be passed through mixed gas under normal pressure, the mixed gas is according to hydrogen: carbon dioxide be 4:1 ratio mixing and
At air speed GHSV=15000mL h-1gcat-1, 360 DEG C of reaction 30min are warming up to the rate of 8 DEG C/min, then use chromatography
Sampling analysis is carried out, obtains methanation yield, specific testing result is as shown in table 1.
It 4 is compared with the data of comparative example 1 it can be found that the present invention passes through vacuum impregnation, Neng Gouyou in conjunction with the embodiments
Effect improves methanation yield, while explanation is conducive to improve the catalytic activity of catalyst, and due to using vacuum impregnation, compare biography
The normal pressure of system impregnates, and can effectively improve dipping effect, is conducive to the catalytic hydrogenation activity for improving catalyst, reduces simultaneously
Dip time is conducive to improve production efficiency；It 4 is compared with the data of comparative example 2 it can be found that the present invention in conjunction with the embodiments
It is roasted by atmosphere of hydrogen, methanation yield can be effectively improved, while explanation is conducive to improve the catalytic activity of catalyst, this
It is due to effectively preventing carrying out the sintering that roasting is easy to appear in air atmosphere by being kept the temperature in the case where atmosphere of hydrogen is protected
Phenomenon effectively prevents the reunion of active component, is conducive to the activity for improving catalyst, by controlling heating and rate of temperature fall,
The reunion of active component caused by sintering phenomenon is further effectively prevented, the activity for improving catalyst is conducive to；
In addition, the data of 4 and comparative example 1-4 compare it can be found that the present invention is first by sodium in conjunction with the embodiments
Base montmorillonite carries out acid processing and auxiliary ultrasonic microwave combination effect, effectively increases the peeling effect of na-montmorillonite, has
The laminated structure of metal precursor load area can be increased conducive to formation, while logical peracid treatment introducing can be used for promoting catalytic
The acidic site of energy, effectively increases catalytic activity；Meanwhile passing through vacuum impregnation and the phase kept the temperature under atmosphere of hydrogen protection
Mutually cooperation plays synergistic effect, can effectively improve the catalytic activity of catalyst.
1 testing result table of table
| Group | Methanation yield/% |
| Embodiment 4 | 87.5 |
| Comparative example 1 | 74.4 |
| Comparative example 2 | 70.8 |
| Comparative example 3 | 60.7 |
| Comparative example 4 | 42.1 |
As can be seen that catalyst prepared by the present invention has excellent catalytic hydrogenation property from result above, avoid making
Use common inorganic oxide as carrier, but by carrying out acid processing and auxiliary ultrasonic microwave combination to na-montmorillonite
Effect forms the laminated structure that can increase metal precursor load area, while logical peracid treatment introducing can be used for promoting catalytic
The acidic site of energy, effectively increases catalytic activity；Meanwhile passing through vacuum impregnation and the phase kept the temperature under atmosphere of hydrogen protection
Mutually cooperation plays synergistic effect, can effectively improve the catalytic activity of catalyst；By then passing through in atmosphere of hydrogen
It is kept the temperature under protection, effectively prevents carrying out the sintering phenomenon that roasting is easy to appear in air atmosphere, effectively prevent activity
The reunion of component, and then be conducive to improve the activity of catalyst；Also by control heating and rate of temperature fall, further effectively avoid
Active component caused by sintering phenomenon is reunited, and is conducive to the activity for improving catalyst, be can be used in catalytic hydrogenation reaction, have
Vast market prospect.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.There is no need and unable to give all embodiments
With exhaustion.Therefore, the present invention is not limited to the above embodiments, and those skilled in the art's announcement according to the present invention does not depart from this hair
The improvement and modification that bright scope is made all should be within protection scope of the present invention.
Claims (10)
1. a kind of support type efficient hydrogenation catalyst, which is characterized in that including below according to the raw material of parts by weight: pretreated carrier
15-20 parts, 4-7 parts of metal precursor, 14-24 parts of deionized water；
Wherein, the preparation method of the pretreated carrier is to weigh suitable na-montmorillonite to be crushed to 400 mesh, is then added 8
It is uniformly mixed that the concentration of times volume is that the sulfuric acid solution of 0.15mol/L carries out, and is re-fed into ultrasonic microwave composite reaction instrument
Ultrasonic microwave combined treatment 20min is carried out at 78 DEG C, centrifugation 15min is then carried out with the rate of 3000r/min, removes upper layer
Vacuum drying 48h is carried out to get the pretreated carrier at 60 DEG C after clear liquid.
2. support type efficient hydrogenation catalyst according to claim 1, which is characterized in that including below according to parts by weight
Raw material: 18 parts of pretreated carrier, 6 parts of metal precursor, 16 parts of deionized water.
3. support type efficient hydrogenation catalyst according to claim 2, which is characterized in that the ultrasonic microwave combination
Treatment conditions are as follows: ultrasonic frequency 30kHz, ultrasonic power 50-70W, microwave frequency 1000MHz, microwave power 50-
70W。
4. support type efficient hydrogenation catalyst according to claim 1, which is characterized in that the metal precursor is six water
Close one of copper nitrate, Nickelous nitrate hexahydrate, cabaltous nitrate hexahydrate or six nitric hydrate ceriums or a variety of combinations.
5. a kind of preparation method of the support type efficient hydrogenation catalyst as described in claim 1-4 is any, which is characterized in that should
Method specifically includes the following steps:
1) pretreated carrier is weighed according to parts by weight to carry out being ground to 450 mesh, obtain material A, it is spare；
2) metal precursor and deionized water are weighed according to parts by weight, is sent into ultrasonic cell disruptor carries out after mixing
It is ultrasonically treated 30min, obtains mixture B；
3) material A obtained in step 1) is warming up to 525 DEG C of progress under nitrogen atmosphere protection with the heating rate of 3 DEG C/min
4h is kept the temperature, room temperature is then down to the rate of temperature fall of 5 DEG C/min, then be ground to 500 mesh, obtains material C；
4) material C obtained in step 3) is uniformly mixed with mixture B obtained in step 2, be placed in vacuum tank and taken out and is true
Sky carries out vacuum impregnation 4h to 50Pa, obtains mixture D；
5) mixture D obtained in step 4) is filtered to remove liquid, then carries out vacuum drying 4h at 70 DEG C, obtain mixture E；
6) mixture E obtained in step 5) is warming up to 555 DEG C under atmosphere of hydrogen protection and carries out heat preservation 2h, be then down to room
Temperature to get.
6. the preparation method of support type efficient hydrogenation catalyst according to claim 5, which is characterized in that in step 2,
The ultrasonic power of the ultrasonic treatment is 80W；The frequency of the ultrasonic treatment is 20kHz；The temperature of the ultrasonic treatment is 30
℃。
7. the preparation method of support type efficient hydrogenation catalyst according to claim 5 or 6, which is characterized in that step 3)
In, the purity of the nitrogen is 99.99%.
8. the preparation method of support type efficient hydrogenation catalyst according to claim 7, which is characterized in that in step 6),
The heating rate is 1 DEG C/min.
9. the preparation method of support type efficient hydrogenation catalyst according to claim 8, which is characterized in that in step 6),
The rate of temperature fall is 2 DEG C/min.
10. a kind of support type efficient hydrogenation catalyst as described in claim 1-4 is any is in the use prepared in hydrogenation catalyst
On the way.
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