CN107008363A - The preparation method of ozone Heterogeneous oxidation solid catalyst - Google Patents

The preparation method of ozone Heterogeneous oxidation solid catalyst Download PDF

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CN107008363A
CN107008363A CN201710274899.XA CN201710274899A CN107008363A CN 107008363 A CN107008363 A CN 107008363A CN 201710274899 A CN201710274899 A CN 201710274899A CN 107008363 A CN107008363 A CN 107008363A
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weight
component
solid catalyst
carrier
ozone heterogeneous
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朱明�
吴雨婕
王麒麟
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Sichuan Normal University
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Abstract

The present invention relates to a kind of preparation method of ozone Heterogeneous oxidation solid catalyst, category environmental protection and technical field of chemical engineering catalysts.The preparation method is to use activated carbon, carnallite, kaolin, red metal and stone, magnesia spinel and peridotite porous material make carrier, carrier is modified through lithium hypochlorite and double (acetylacetone,2,4-pentanedione) beryllium reamings, add surfactant β hydroxyethyl dimethyls ammonium lauryl sulfate and surface activation process is carried out under ul-trasonic irradiation, then ultrasonic surface activated carrier in hydrothermal reaction kettle with composite mineralizer borax and potassium sulfate, the cyclopentadiene promethium of catalytic activity auxiliary agent predecessor three, it is hydrated three acetic acid terbiums, three (6, 6, 7, 7, 8, 8, 8 seven fluorine 2, 2 dimethyl 3, 5 octene diketone) dysprosium (III), ten water holmium oxalate Rare-earth chemicals, catalytic active center component predecessor normal transition metallo-organic compound cobalt edetate, zinc lactate, zirconium carbonate ammonium and the ammino platinum of precious metal chemical complex dichloro two, hydro-thermal reaction is carried out under the effect of emulsifying agent stearic acid trimethylamine groups ethanol ester ammonium iodide, reaction product drying is removed after moisture, in Muffle furnace, calcination obtains ozone Heterogeneous oxidation solid catalyst under certain temperature.

Description

The preparation method of ozone Heterogeneous oxidation solid catalyst
Technical field
The present invention relates to a kind of preparation method of ozone Heterogeneous oxidation solid catalyst, category environmental protection and chemical catalyst skill Art field.
Background technology
Ozonation technology using ozone oxidation ability it is strong the characteristics of, can be by many organic pollution oxidation Decompositions, extensively For wastewater treatment.Catalytic ozonation technology is divided into ozone homogeneous catalytic oxidation and ozone heterogeneous catalytic oxidation, and ozone is equal Phase catalysis oxidation has that the more difficult separation and recovery of catalyst is reused, ozone utilization rate is low causes water process operating cost higher, Organic pollutant removal rate is relatively low simultaneously and easily causing secondary pollution of water is limited to its application;Ozone heterogeneous catalysis oxygen There is change technology catalyst to be easily isolated and recycled and reusable, ozone utilization rate is high, organic pollutant removal rate is higher, drop Low water process operating cost and receive significant attention its application the advantages of do not result in secondary pollution.Ozone heterogeneous catalysis It is to reach local organic matter enrichment by catalyst surface absorption organic matter that oxidation of organic compounds, which is decomposed, while ozone molecule absorption exists The hydroxyl radical free radical that catalyst surface produces high activity under catalyst action decomposes organic matter.Ozone heterogeneous catalytic oxidation Handle in waste water technology, core technology is the preparation of ozone Heterogeneous oxidation solid catalyst.
Ozone Heterogeneous oxidation solid catalyst is generally made up of carrier, activated centre and auxiliary agent.Due to being polluted in waste water Species are various, complex chemical composition feature, can produce harmful effect to performance such as absorption, the mithridatism of catalyst. Prepare that the carrier structure that ozone Heterogeneous oxidation solid catalyst uses is more single at present, adsorptivity is relatively low;Activated centre is universal Using normal transition metal salt, mithridatism is poor;Preparation method mainly has infusion process, the precipitation method, mixing method and collosol and gel etc. Method attachment activity center and adjuvant component are easily liquated out in carrier surface, activated centre and adjuvant component, cause catalyst Easily lose catalytic activity.For exist in current ozone Heterogeneous oxidation solid catalyst preparation method Catalyst Adsorption compared with Low, mithridatism is poor and easily loses catalytic activity problem, and exploitation is strengthened using multicomponent porous carrier through reaming, surface active The adsorptivity of catalyst, catalytic activity auxiliary agent predecessor, normal transition Organometallic are made using Rare-earth chemicals Compound and precious metal chemical complex are made catalytic active center predecessor and prepared with multicomponent porous carrier through hydro-thermal reaction, high temperature sintering Ozone Heterogeneous oxidation solid catalyst containing multi-element metal has to improve the preparation method of catalyst mithridatism and catalytic activity There are larger environmental benefit and higher practical value.
The content of the invention
For existing in current ozone Heterogeneous oxidation solid catalyst preparation method, Catalyst Adsorption is relatively low, mithridatism Poor to lose catalytic activity problem with easy, exploitation strengthens catalyst using multicomponent porous carrier through reaming, surface active Adsorptivity, catalytic activity auxiliary agent predecessor, normal transition metallo-organic compound and expensive are made using Rare-earth chemicals Metallic compound is made catalytic active center predecessor and prepared with multicomponent porous carrier through hydro-thermal reaction, high temperature sintering containing polynary gold The ozone Heterogeneous oxidation solid catalyst of category to improve the preparation method of catalyst mithridatism and catalytic activity, it is characterized in that Component A can be added in closed reactor and deionized water stirring prepares the aqueous solution, the weight concentration for control component A is 2%~6%, After the completion of prepared by solution, B component is added under agitation, 35 DEG C~50 DEG C are warming up to, continues stirring reaction 3h~6h, is filtered, instead Product is answered to obtain reaming modified support after 102 DEG C~106 DEG C dry constant weights;Reaming modified support puts into ultrasound reactor, The aqueous solution prepared by component C and deionized water is added, the weight concentration of component C is 3%~8%, is uniformly mixed, and control is super Sound power density is 0.3~0.8W/m3, frequency 20kHz~30kHz, 40 DEG C~55 DEG C, sonic oscillation 2h~5h obtains ultrasound Surface active carrier mixed liquor;Ultrasonic surface activated carrier mixed liquor is transferred in hydrothermal reaction kettle, add D components and go from The aqueous solution that sub- water is prepared, the weight concentration of D components is 40%~55%, by weight, D component deionized water solutions:Ultrasonic table Weight ratio=1 of face activated carrier mixed liquor:(1.5~2), control 120 DEG C~180 DEG C of temperature, the hydro-thermal reaction time be 8h~ 16h, then dries to obtain fine particle;Fine particle is in Muffle furnace, 600 DEG C~950 DEG C, and calcination 3h~8h obtains ozone non- Homogeneous oxidizing solid catalyst.The component A is made up of lithium hypochlorite, double (acetylacetone,2,4-pentanedione) berylliums, by weight, lithium hypochlorite: Weight ratio=1 of double (acetylacetone,2,4-pentanedione) berylliums:(1~1.6), B component is by activated carbon, carnallite, kaolin, red metal and stone, magnesium point crystalline substance Stone, peridotite composition, by weight, activated carbon:Carnallite:Kaolin:Red metal and stone:Magnesia spinel:The weight ratio of peridotite =(5~15):(7~17):(9~19):(11~21):(13~23):(15~25), by weight, component A:The weight of B component The ratio between amount=1:(10~20), component C is beta-hydroxyethyl dimethyl dodecyl base ammonium sulfate, by weight, component C:Reaming is modified Weight ratio=1 of carrier:(5~10), D components are by composite mineralizer borax, potassium sulfate, the ring of catalytic activity auxiliary agent predecessor three Pentadiene promethium, hydration three acetic acid terbiums, three (the fluoro- 2,2- dimethyl -3,5- octenes diketone of 6,6,7,7,8,8,8- seven) dysprosiums (III), Ten water holmium oxalate Rare-earth chemicals, catalytic active center predecessor normal transition metallo-organic compound gluconic acid Cobalt, zinc lactate, zirconium carbonate ammonium and the ammino platinum of precious metal chemical complex dichloro two, emulsifying agent stearic acid trimethylamine groups ethanol ester ammonium iodide Composition, by weight, borax:Potassium sulfate:Three cyclopentadiene promethiums:It is hydrated three acetic acid terbiums:Three (6,6,7,7,8,8,8- seven fluoro- 2, 2- dimethyl -3,5- octenes diketone) dysprosium (III):Ten water holmium oxalates:Cobalt edetate:Zinc lactate:Zirconium carbonate ammonium:Dichloro diamino Close platinum:The weight ratio of stearic acid trimethylamine groups ethanol ester ammonium iodide=(4~8):(6~10):(3~6):(4~7):(5~ 8):(6~9):(10~15):(12~18):(4~7):(6~9):(6~20).Activated carbon, carnallite, the height of the B component Ridge is native, red metal and stone, magnesia spinel, peridotite are crushed respectively, and deionized water washing, which is dried, to be removed after moisture, is entered through standard screen - 200 mesh of row ,+400 mesh sieves point, it is the mm of 0.0370mm~0.0750 control particle diameter.
What the technical method of the present invention was realized in:Lithium hypochlorite LiClO, double (second can be being added in closed reactor Acyl acetone) beryllium C10H14BeO4The aqueous solution is prepared with deionized water stirring, it is 0.0370mm~0.0750mm to add particle diameter after screening Activated carbon, carnallite, kaolin, red metal and stone, magnesia spinel and peridotite porous material carrier, in certain temperature and stirring bar Under part, the small Be of aqueous solution Ionic Radius2+(0.31Å)、Li+(0.60Å)Displace part ion radius in porous material big Ca2+(0.99Å)、K+(1.33Å)、Ba2+(1.35Å)Plasma, the aperture of porous material carrier becomes big, surface roughness increasing Plus, filtering dries the reaming modified support input ultrasound reactor after constant weight, adds beta-hydroxyethyl dimethyl dodecyl base Ammonium sulfate [C12H25N(CH3)2CH2CH2OH]+CH3SO4 -The aqueous solution, controls ultrasonic power density, ultrasonic frequency, temperature and surpasses The sound oscillation time, under ultrasonic cavitation effect, beta-hydroxyethyl dimethyl dodecyl base ammonium sulfate [C12H25N(CH3)2CH2CH2OH]+CH3SO4 -It is easy to escape into reaming modified support duct from the aqueous solution or is attached to reaming modified support surface, It is beneficial to being interconnected and carrier surface activation for carrier duct, enhances adsorptivity;After the completion of ultrasonic activation, ultrasonic surface is lived Change carrier mixed liquor to be transferred in hydrothermal reaction kettle, with borax Na2B4O7·10H2O, potassium sulfate K2SO4Composite mineralizer, catalysis The cyclopentadiene promethium Pm (C of coagent predecessor three5H5)3, hydration three acetic acid terbium C6H11O7Tb, three (6,6,7,7,8,8,8- seven Fluoro- 2,2- dimethyl -3,5- octenes diketone) dysprosium (III) C30H30DyF21O6, ten water holmium oxalate C6Ho2O12Rare earth metal organises Compound, catalytic active center component predecessor normal transition metallo-organic compound cobalt edetate C12H22O14Co, zinc lactate C6H10O6Zn, zirconium carbonate ammonium (NH4)2·C2H2O8The Zr and ammino platinum Pt (NH of dichloro two3)2Cl2Precious metal chemical complex, in emulsifying agent Stearic acid trimethylamine groups ethanol ester ammonium iodide [C17H35COOCH2CH2N(CH3)CH2]+I-Hydro-thermal reaction is carried out under, mineralizer adds Fast diffusion, make reactant lattice activate, promote the progress of solid phase reaction, ultrasonic surface activated carrier has with rare earth metal Machine compound, normal transition metallo-organic compound, precious metal chemical complex Uniform Doped, emulsifying agent stearic acid trimethylamine groups ethanol Ester ammonium iodide make reaction solution formed quasi-stationary emulsion prevent separation of solid and liquid, sedimentation, while to the further surface of porous carrier Activation, by the way that in certain temperature, the hydro-thermal reaction of time, drying obtains the fine silt thing of Uniform Doped;The fine powder of Uniform Doped Grain thing is in Muffle furnace, and through high temperature sintering, organic matter carbonization therein further enhances the microcellular structure of porous carrier, Obtain the ozone of the catalytic active center of porous carrier supported rare earth metal oxide, transition metal oxide and noble metal formation Heterogeneous oxidation solid catalyst, improves the mithridatism and catalytic activity of catalyst.
Relative to art methods, outstanding feature of the present invention is that activated carbon, carnallite, kaolinite are used in technology of preparing Native, red metal and stone, magnesia spinel, peridotite porous material make carrier, due to lithium hypochlorite LiClO and double (acetylacetone,2,4-pentanedione) berylliums C10H14BeO4Reaming effect, beta-hydroxyethyl dimethyl dodecyl base ammonium sulfate [C12H25N(CH3)2CH2CH2OH]+CH3SO4 -, it is hard Resin acid trimethylamine groups ethanol ester ammonium iodide [C17H35COOCH2CH2N(CH3)CH2]+I-To being interconnected and surface active for duct Effect;Rare-earth chemicals, normal transition metallo-organic compound and precious metal chemical complex are reached by hydro-thermal reaction To Uniform Doped and it is attached in carrier surface and duct, high temperature sintering makes organic matter carbonization strengthen and form multi-level Microcellular structure, porous carrier supported rare earth metal oxide, transition metal oxide and noble metal formation multi-element metal urge Change activated centre and combined with porous carrier more firm, the ozone Heterogeneous oxidation solid catalyst of preparation has stronger absorption Property, the cooperative effect of multi-element metal, the noble metal of particularly doping have stability and high activity, can suppress metal catalytic work Liquating out for property component, improves the mithridatism and catalytic activity of catalyst, with good environmental benefit and economic benefit.
Embodiment
Embodiment 1:1.35g lithium hypochlorites, double (acetylacetone,2,4-pentanedione) berylliums of 1.65g, 140ml deionized waters, being added to volume is 500ml's can be uniformly mixed in closed reactor, and the weight concentration of the aqueous solution is 2.1%, lithium hypochlorite:Double (levulinics Ketone) beryllium weight ratio=1:1.2;Add deionized water wash to it is neutral, 103 DEG C dry remove -200 mesh of sieving after moisture~+ The 2.75g activated carbons of 400 mesh standard sieves, 3.75g carnallites, 4.75g kaolin, the red metals and stones of 5.75g, 6.75g magnesia spinels, The weight of 7.75g peridotites, lithium hypochlorite and double (acetylacetone,2,4-pentanedione) berylliums(3g):The weight of porous material(31.5g)=1:10.5, 36 DEG C are warming up to, reaming modified support 31g is obtained after continuing stirring reaction 3.2h, filtering, 103 DEG C of dry constant weights;It is super in 500ml In sound wave reactor, reaming modified support 31g is put into, 3.25g beta-hydroxyethyl dimethyl dodecyl base ammonium sulfate is added and is dissolved in The aqueous solution of 100ml deionized waters, the weight concentration of the aqueous solution is 3.1%, is uniformly mixed, beta-hydroxyethyl dimethyl ten Dialkyl group ammonium sulfate(3.25g):Reaming modified support(31g )=1:9.5;It is 0.4 W/m to control ultrasonic power density3, ultrasound 41 DEG C of wave frequency rate 21kHz, temperature, sonic oscillation 2.2h;After the completion of ultrasonic activation, the ultrasonic surface in ultrasound reactor is lived Change carrier mixed liquor to be transferred in 500ml hydrothermal reaction kettles, add by 2.1g boraxs, 3.05g potassium sulfates, the rings penta 2 of 1.6g tri- Alkene promethium, 2.05g are hydrated three acetic acid terbiums, 2.6g tri- (the fluoro- 2,2- dimethyl -3,5- octenes diketone of 6,6,7,7,8,8,8- seven) dysprosium (III), the water holmium oxalates of 3.05g ten, 5.05g cobalt edetates, 6.1g zinc lactates, 2.05g zirconium carbonate ammoniums, 3.1g dichloro diaminos Close the aqueous solution that platinum, 3.05g stearic acid trimethylamine groups ethanol ester ammonium iodides and 50ml deionized waters are prepared, the weight of the aqueous solution It is 40.3%, the weight of the aqueous solution to measure concentration:Weight=83.8g of ultrasonic surface activated carrier mixed liquor:134.25g =1: 1.6,125 DEG C of temperature is controlled, the hydro-thermal reaction time is 8.3h, then dries to obtain fine silt thing for 105 DEG C;Fine silt thing is in Muffle furnace Interior, 620 DEG C, calcination 3.2h after cooling down, can obtain the ozone Heterogeneous oxidation solid catalyst of fine particle shape.
Embodiment 2:0.24g lithium hypochlorites, double (acetylacetone,2,4-pentanedione) berylliums of 0.36g, 10ml deionized waters, being added to volume is 100ml's can be uniformly mixed in closed reactor, and the weight concentration of the aqueous solution is 5.7%, lithium hypochlorite:Double (levulinics Ketone) beryllium weight ratio=1:1.5;Add deionized water wash to it is neutral, 103 DEG C dry remove -200 mesh of sieving after moisture~+ The 1.45g activated carbons of 400 mesh standard sieves, 1.65g carnallites, 1.85g kaolin, the red metals and stones of 2.05g, 2.25g magnesia spinels, The weight of 2.45g peridotites, lithium hypochlorite and double (acetylacetone,2,4-pentanedione) berylliums(0.6g):The weight of porous material(11.7g)=1: 19.5,48 DEG C are warming up to, reaming modified support 11.5g is obtained after continuing stirring reaction 5.8h, filtering, 105 DEG C of dry constant weights; In 100ml ultrasound reactors, reaming modified support 11.5g is put into, 2.2g beta-hydroxyethyl dimethyl dodecyl base sulphur is added Sour ammonium is dissolved in the aqueous solution of 26ml deionized waters, and the weight concentration of the aqueous solution is 7.8%, is uniformly mixed, beta-hydroxyethyl two Methyl ammonium lauryl sulfate(2.2g):Reaming modified support(11.5g )=1:5.2;It is 0.7 W/ to control ultrasonic power density m3, ultrasonic frequency 29kHz, 54 DEG C of temperature, sonic oscillation 4.7h;After the completion of ultrasonic activation, super in ultrasound reactor Sound surface active carrier mixed liquor is transferred in 100ml hydrothermal reaction kettles, add by 0.78g boraxs, 0.97g potassium sulfates, The cyclopentadiene promethiums of 0.58g tri-, 0.67g be hydrated three acetic acid terbiums, 0.78g tri- (fluoro- 2,2- dimethyl -3 of 6,6,7,7,8,8,8- seven, 5- octenes diketone) dysprosium (III), the water holmium oxalates of 0.87g ten, 1.48g cobalt edetates, 1.77g zinc lactates, 0.68g zirconium carbonates It is water-soluble that ammonium, the ammino platinum of 0.87g dichloros two, 1.98g stearic acid trimethylamine groups ethanol ester ammonium iodides and 10ml deionized waters are prepared Liquid, the weight concentration of the aqueous solution is 53.3%, the weight of the aqueous solution:The weight of ultrasonic surface activated carrier mixed liquor= 21.43g:39.7g =1:1.9,175 DEG C of temperature is controlled, the hydro-thermal reaction time is 15.5h, then dries to obtain fine silt for 105 DEG C Thing;Fine silt thing is in Muffle furnace, 930 DEG C, calcination 7.5h, and after cooling down, the ozone that can obtain fine particle shape is heterogeneous Oxidized solid catalyst.
Comparative example 1:Preparation process is not added with lithium hypochlorite, double (acetylacetone,2,4-pentanedione) berylliums, Β-hydroxyethyl dimethyl dodecyl Outside ammonium sulfate, stearic acid trimethylamine groups ethanol ester ammonium iodide, borax and potassium sulfate, whole preparation process, preparation condition and implementation Example 1 is identical.
The parameter of ozone Heterogeneous oxidation solid catalyst prepared by embodiment 1, embodiment 2 and comparative example 1 is included in table 1.
The embodiment of table 1 and comparative example prepare ozone Heterogeneous oxidation solid catalysis agent parameter
Project Average pore size (nm) Pore volume (cm3/g) BET is than surface (m2/g)
Embodiment 1 4.602 0.6109 781.57
Embodiment 2 4.116 0.5627 673.54
Comparative example 1 2.220 0.3242 477.98

Claims (2)

1. a kind of preparation method of ozone Heterogeneous oxidation solid catalyst, it is characterized in that A groups can added in closed reactor Divide and deionized water stirring prepares the aqueous solution, the weight concentration for controlling component A is 2%~6%, after the completion of prepared by solution, in stirring Lower addition B component, is warming up to 35 DEG C~50 DEG C, continues stirring reaction 3h~6h, and filtering, reaction product is dry at 102 DEG C~106 DEG C Reaming modified support is obtained after dry constant weight, reaming modified support input ultrasound reactor, addition is matched somebody with somebody by component C and deionized water The aqueous solution of system, the weight concentration of component C is 3%~8%, is uniformly mixed, and it is 0.3~0.8W/ to control ultrasonic power density m3, frequency 20kHz~30kHz, 40 DEG C~55 DEG C, sonic oscillation 2h~5h obtains ultrasonic surface activated carrier mixed liquor, transfer Into hydrothermal reaction kettle, the aqueous solution that D components and deionized water are prepared is added, the weight concentration of D components is 40%~55%, is pressed Weight meter, D component deionized water solutions:Weight ratio=1 of ultrasonic surface activated carrier mixed liquor:(1.5~2), control temperature 120 DEG C~180 DEG C, the hydro-thermal reaction time is 8h~16h, then dries to obtain fine silt thing, fine silt thing is in Muffle furnace, 600 DEG C~950 DEG C, calcination 3h~8h obtains ozone Heterogeneous oxidation solid catalyst;The component A by expanding agent lithium hypochlorite, Double (acetylacetone,2,4-pentanedione) beryllium compositions, by weight, lithium hypochlorite:Weight ratio=1 of double (acetylacetone,2,4-pentanedione) berylliums:(1~1.6), B groups Divide and be made up of activated carbon, carnallite, kaolin, red metal and stone, magnesia spinel, peridotite, by weight, activated carbon:Carnallite:It is high Ridge soil:Red metal and stone:Magnesia spinel:The weight ratio of peridotite=(5~15):(7~17):(9~19):(11~21):(13~ 23):(15~25), by weight, component A:Weight ratio=1 of B component:(10~20), component C is beta-hydroxyethyl dimethyl Ammonium lauryl sulfate, by weight, component C:Weight ratio=1 of reaming modified support:(5~10), D components are by grandidierite Agent borax, potassium sulfate, the cyclopentadiene promethium of catalytic activity auxiliary agent predecessor three, three acetic acid terbiums of hydration, three (6,6,7,7,8,8,8- Seven fluoro- 2,2- dimethyl -3,5- octene diketone) dysprosium (III), ten water holmium oxalate Rare-earth chemicals, in catalytic activity Heart predecessor normal transition metallo-organic compound cobalt edetate, zinc lactate, zirconium carbonate ammonium and precious metal chemical complex dichloro two Ammino platinum, emulsifying agent stearic acid trimethylamine groups ethanol ester ammonium iodide composition, by weight, borax:Potassium sulfate:Three cyclopentadiene Promethium:It is hydrated three acetic acid terbiums:Three (the fluoro- 2,2- dimethyl -3,5- octenes diketone of 6,6,7,7,8,8,8- seven) dysprosiums (III):Ten pasture and water Sour holmium:Cobalt edetate:Zinc lactate:Zirconium carbonate ammonium:The ammino platinum of dichloro two:The weight of stearic acid trimethylamine groups ethanol ester ammonium iodide The ratio between amount=(4~8):(6~10):(3~6):(4~7):(5~8):(6~9):(10~15):(12~18):(4~7):(6 ~9):(6~20).
2. B component is by activated carbon, carnallite, kaolin, red metal and stone, magnesia spinel, peridotite group according to claim 1 Into activated carbon, carnallite, kaolin, red metal and stone, magnesia spinel, peridotite are crushed respectively, and deionized water washing drying is removed Go after moisture, sieved through standard screen, it is 0.0370mm~0.0750mm to control particle diameter.
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