CN103769141B - Catalyst for phenylethylene dehydrogenation, preparation method and its usage - Google Patents
Catalyst for phenylethylene dehydrogenation, preparation method and its usage Download PDFInfo
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- CN103769141B CN103769141B CN201210412593.3A CN201210412593A CN103769141B CN 103769141 B CN103769141 B CN 103769141B CN 201210412593 A CN201210412593 A CN 201210412593A CN 103769141 B CN103769141 B CN 103769141B
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Abstract
The present invention relates to a kind of catalyst for phenylethylene dehydrogenation, preparation method and its usage, in the case of mainly solving to be not added with common calcium silicate cement present in conventional art, low potassium catalytic mechanical insufficient strength is high, thus causes the technical problem that catalyst stability declines.The present invention is by using in ferripotassium cerium molybdenum calcium catalyst system, choose the desired amount of cerium source and the desired amount of source of iron, potassium source, molybdenum source, alkaline earth oxide and perforating agent mix homogeneously, molding, it is dried, makes catalyst after roasting, wherein cerium source uses cerous nitrate and cerous carbonate to be raw material and join the technical scheme in catalyst in certain proportion and preferably solve this problem, can be used in the commercial production of ethyl benzene dehydrogenation preparation of styrene.
Description
Technical field
The present invention relates to a kind of catalyst for phenylethylene dehydrogenation, preparation method and its usage.
Background technology
The basic composition of current industrial ethyl benzene dehydrogenation preparation of styrene catalyst includes major catalyst, promoter, system
Hole agent and binding agent etc..Catalyst in early days is Fe-K-Cr system, such as published United States Patent (USP) 4467046 and European patent
0296285A1.Although the activity of such catalyst and stability are preferable, but due to the catalyst oxide containing Cr, environment is made
Become certain pollution, gradually eliminated.Develop into Fe-K-Ce-Mo series afterwards, instead of Cr with Ce, can preferably improve
The activity of catalyst and stability, overcome again Cr toxicity big simultaneously, pollutes the drawback of environment.Then develop into as Fe-K-Ce-
The catalyst of Mo-Mg series, such as published EP502510, WO9710898, CN1233604 and CN1470325.The addition of Ce
The activity of catalyst, especially catalyst on high potassium content can be greatly improved and affect notable.But the catalysis of high potassium content
When agent is placed in atmosphere, the easy adsorption moisture of catalyst, the anti-crushing power making catalyst is low, it is easy to efflorescence.And, anti-in dehydrogenation
During Ying, potassium little by little to granule internal migration, or easily can be washed, thus causes catalyst stability to decline, and impact is urged
Agent service life, therefore, research at present has focused largely on low potassium catalyst.Research finds, in low potassium catalyst, urge
In agent preparation process, the source of Ce is very big, according to relevant reported in literature up to now, scientific research to the performance impact of catalyst
Personnel had made a lot of trial.As published United States Patent (USP) 5376613 and 5171914 uses cerous carbonate to be the cerium of catalyst
Source, Chinese patent 1298856A uses cerous nitrate and Sedemesis. to be cerium source, and Chinese patent 1233604 and 1470325 uses nitric acid
Cerium is cerium source, and its characteristic comparing pays close attention to the impact on catalyst activity of the Ce source, and all adds common silicic acid in catalyst
Calcium cement ensures the mechanical strength of catalyst.In the case of these documents are all without reference to being not added with cement, change cerium source to urging
Agent mechanical strength and the impact of catalyst life.To this end, find suitable Ce source to prepare high mechanical properties and long-life low
Potassium catalyst is the target that research worker is made great efforts.
Summary of the invention
One of the technical problem to be solved is the situation being not added with common calcium silicate cement that conventional art exists
Under, low potassium catalyst (K2O weight percentage is less than 14%) mechanical strength is not high enough, thus cause the problem that stability declines,
A kind of new catalyst for phenylethylene dehydrogenation is provided.It is low that this catalyst has potassium content, is keeping greater activity with the most simultaneously
The advantage also with higher mechanical strength and stability.The two of the technical problem to be solved are to provide a kind of and solve
The certainly preparation method of the catalyst-compatible of one of technical problem.The three of the technical problem to be solved are to provide one
The purposes of described catalyst.
For solving one of above-mentioned technical problem, the technical solution used in the present invention is as follows: a kind of catalyst for phenylethylene dehydrogenation, with
Percentage by weight meter includes consisting of: (a) 65～the Fe of 81%2O3；(b) 5～the K of 13%2O；(c) 8～the CeO of 14%2；
(d) 0.5～the Mo of 5%2O3；(e) 0.5～the CaO of 5%；Wherein the raw material sources of cerium oxide are in cerous nitrate and cerous carbonate, and with
Cerium oxide meter, cerous nitrate is 0.5～30 with the weight ratio of cerous carbonate.
In technique scheme, in terms of cerium oxide, cerous nitrate is 2～18 with the preferred scope of weight ratio of cerous carbonate, more excellent
Selecting scope is 4～12.By weight percentage, Fe2O3The preferred scope of consumption be 70～78%, K2The preferred scope of consumption of O is
7～10%, CeO2The preferred scope of consumption be 9～12%, Mo2O3The preferred scope of consumption be 1～3.5%, the consumption of CaO is excellent
Selecting scope is 1.5～4.5%.
For solving the two of above-mentioned technical problem, the technical solution used in the present invention is as follows: a kind of catalyst for phenylethylene dehydrogenation
Preparation method, comprises the following steps: by weight percentage, by aequum cerium source and the desired amount of source of iron, potassium source, molybdenum source, alkali
Soil metal oxide and perforating agent mix homogeneously, add water, is formed with viscosity, the dough thing of applicable extrusion, through extrusion, one-tenth
Type, dried, roasting 0.5～24 hours at 500～1000 DEG C, prepare catalyst, wherein the raw material sources of cerium oxide are in nitre
Acid cerium and cerous carbonate, and in terms of cerium oxide, cerous nitrate: the weight ratio of cerous carbonate is 0.5～30: 1.
In technique scheme, catalyst all components includes consisting of by weight percentage: 65～81%
Fe2O3, 5～the K of 13%2The CeO of O, 8～14%2, 0.5～the Mo of 5%2O3, 0.5～the CaO of 5%；Fe2O3By iron oxide red and
Iron oxide yellow composition, K used add with potassium salt or hydroxide form, Mo used adds with molybdenum salt or oxide form, alkaline earth
Metal adds with its salt or oxide form；Perforating agent be graphite, polystyrene microsphere, methylcellulose, hydroxyethyl cellulose,
One or more in carboxymethyl cellulose, its addition is the 2～7% of total catalyst weight；Baking temperature is 50～120 DEG C,
Drying time is 2～24 hours；The preferred scope of sintering temperature is 600～870 DEG C, and the preferred scope of roasting time is 4～15 hours.
The catalyst granules that the present invention prepares can be solid cylindrical, hollow cylinder, trilobal, rhombus, quincunx,
Honeycombeds etc. are variously-shaped, the restriction that its diameter and particle length be not the most fixing, it is recommended that a diameter of 3 millimeters of catalyst employing,
The solid cylindrical granule of long 5～10 millimeters.
For solving the three of above-mentioned technical problem, the technical solution used in the present invention is as follows: described catalyst for phenylethylene dehydrogenation is used
In the reaction of ethyl benzene dehydrogenation preparation of styrene, reaction condition is: reaction pressure is normal pressure, and reaction temperature is 580～640 DEG C,
Liquid air speed is 0.5～2.0 hour-1, steam/ethylbenzene weight ratio is 1.0～3.0.
The catalyst prepared carries out activity rating in isotherm formula fixed bed, to catalyst for preparing phenylethylene from dehydrogenation of ethylbenzene activity
For evaluation, process is summarized as follows:
Through dosing pump, reaction raw materials is inputted preheating mixer respectively, and preheating enters reactor, reaction after being mixed into gaseous state
Device uses electric-heating-wire-heating, makes up to predetermined temperature.Reactor inside diameter is 1 " stainless steel tube, interior load 100 milliliters and urge
Agent.The reactant that flowed out by reactor water cooled solidifying after with chromatographic, it forms.
Conversion of ethylbenzene, selectivity of styrene calculate as follows:
Conversion of ethylbenzene %=
Selectivity of styrene %=
The technology requirement that in the present invention, the mechanical strength of catalyst is specified by standard HG/T2782-1996 is measured, and makes
With DL-II type intelligence granule strength instrument.Specimen length 5 millimeters, is one group with 40 and tests, take the arithmetic of its measurement result
Meansigma methods is final mechanical strength value, with the newton (N) unit as mechanical strength.
The present invention is by ferrum-potassium-cerium-molybdenum-calcium system, and cerium source uses the mixture of cerous nitrate and cerous carbonate to be former
Material, and join in catalytic component with suitable mixed proportion, owing to cerous nitrate is dissolved in water, it is easy to cerium oxide is dispersed in and urges
The surface of agent, thus improve the activity and selectivity of catalyst, and cerous carbonate belongs to alkaline matter, is not added with in catalyst simultaneously
Portland cement, improves the alkalescence of system, stabilizes the active phase of catalyst, so that low potassium catalyst is keeping relatively
High activity the most also has higher mechanical strength and preferable stability with selective, uses the catalyst of the present invention,
Normal pressure, liquid air speed 1.0 hours-1, 620 DEG C, under the conditions of steam/ethylbenzene (weight ratio) 2.0, prepare benzene for ethylbenzene dehydrogenation
The reaction of ethylene, its conversion ratio up to 77.5%, selectivity up to 95.2%, the intensity of catalyst reach 135N, and stability is big
In 500 hours, achieve preferable technique effect.
Below by embodiment, the invention will be further elaborated.
Detailed description of the invention
[embodiment 1]
By 212.0 grams of iron oxide reds, 80.0 grams of iron oxide yellows, 58.0 grams of potassium carbonate, 100.0 grams of cerous nitrates, 2.8 grams of carbonic acid
Cerium, 10.0 grams of ammonium molybdates, 6.1 grams of calcium hydroxide and 5.0 grams of magnesium oxide and 20.5 grams of carboxymethyl celluloses stir 1 in kneader
Hour, add deionized water, then mix and stir half an hour, take out extrusion, be extruded into diameter 3 millimeters, length 5～the granule of 10 millimeters, put
Entering baking oven, 80 DEG C are dried 2 hours, and 120 DEG C are dried 2 hours, are subsequently placed in muffle furnace, within 4 hours, obtain finished product catalysis in 850 DEG C of roastings
Agent.
Catalyst is carried out mechanical strength mensuration, and test result is listed in table 1.
100 milliliters of catalyst are loaded reactors, normal pressure, liquid air speed 1.0 hours-1, 620 DEG C, steam/ethylbenzene
Carrying out activity rating under the conditions of (weight ratio) 2.0, test result is listed in table 1.
[embodiment 2]
By 210.0 grams of iron oxide reds, 183.0 grams of iron oxide yellows, 52.0 grams of potassium carbonate, 102.0 grams of cerous nitrates, 9.5 grams of carbon
Acid cerium, 5.1 grams of ammonium molybdates, 8.0 grams of calcium carbonate and 2.0 grams of polystyrene microspheres, 16.5 grams of carboxymethyl celluloses are in kneader
Stir 1 hour, add deionized water, then mix and stir half an hour, take out extrusion, be extruded into diameter 3 millimeters, length 5～10 millimeters
Grain, puts into baking oven, and 120 DEG C are dried 2 hours, are subsequently placed in muffle furnace, within 14 hours, obtain finished catalyst in 650 DEG C of roastings.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[embodiment 3]
By 283.0 grams of iron oxide reds, 103.6 grams of iron oxide yellows, 75.1 grams of potassium carbonate, 89.5 grams of cerous nitrates, 15.2 grams of carbon
Acid cerium, 10.5 grams of ammonium molybdates, 6.0 grams of calcium oxide, 7.0 grams of hydroxyethyl celluloses, 20.3 grams of carboxymethyl celluloses are in kneader
Stir 1 hour, add deionized water, then mix and stir half an hour, take out extrusion, be extruded into diameter 3 millimeters, length 5～10 millimeters
Grain, puts into baking oven, and 50 DEG C are dried 12 hours, are subsequently placed in muffle furnace, within 0.5 hour, obtain finished catalyst in 1000 DEG C of roastings.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[embodiment 4]
By 130.8 grams of iron oxide reds, 145.0 grams of iron oxide yellows, 60.0 grams of potassium carbonate, 50.0 grams of cerous nitrates, 58.0 grams of carbon
Acid cerium, 15.0 grams of ammonium molybdates, 10.8 grams of calcium carbonate, 5.0 grams of magnesium oxide and 3.5 grams of methylcellulose, 16.2 grams of carboxymethyl celluloses
Element stirs 1 hour in kneader, adds deionized water, then mixes and stirs half an hour, takes out extrusion, is extruded into diameter 3 millimeters, length 5
～the granule of 10 millimeters, put into baking oven, 100 DEG C are dried 6 hours, are subsequently placed in muffle furnace, within 24 hours, are become in 500 DEG C of roastings
Product catalyst.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[embodiment 5]
By 241.0 grams of iron oxide reds, 98.0 grams of iron oxide yellows, 60.0 grams of potassium carbonate, 123.0 grams of cerous nitrates, 5.5 grams of carbonic acid
It is little that cerium, 16.8 grams of ammonium molybdates, 18.6 grams of calcium oxide and 4.0 grams of graphite, 15.3 grams of carboxymethyl celluloses stir 1 in kneader
Time, add deionized water, then mix and stir half an hour, take out extrusion, be extruded into diameter 3 millimeters, length 5～the granule of 10 millimeters, put into
Baking oven, 110 DEG C are dried 4 hours, are subsequently placed in muffle furnace, within 12 hours, obtain finished catalyst in 780 DEG C of roastings.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[embodiment 6]
By 190.0 grams of iron oxide reds, 135.0 grams of iron oxide yellows, 78.0 grams of potassium carbonate, 100.0 grams of cerous nitrates, 8.0 grams of carbon
Acid cerium, 6.3 grams of ammonium molybdates, 11.6 grams of calcium hydroxide, 5.0 grams of magnesium oxide and 3.5 grams of methylcellulose, 16.2 grams of carboxymethyl celluloses
Element stirs 1 hour in kneader, adds deionized water, then mixes and stirs half an hour, takes out extrusion, is extruded into diameter 3 millimeters, length 5
～the granule of 10 millimeters, put into baking oven, 90 DEG C are dried 8 hours, are subsequently placed in muffle furnace, within 4 hours, obtain finished product in 800 DEG C of roastings
Catalyst.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[embodiment 7]
By 165.0 grams of iron oxide reds, 100.8 grams of iron oxide yellows, 70.0 grams of potassium carbonate, 92.0 grams of cerous nitrates, 8.5 grams of carbonic acid
It is little that cerium, 21.6 grams of ammonium molybdates, 6.8 grams of calcium carbonate, 13.2 grams of magnesium oxide and 16.2 grams of carboxymethyl celluloses stir 1 in kneader
Time, add deionized water, then mix and stir half an hour, take out extrusion, be extruded into diameter 3 millimeters, length 5～the granule of 10 millimeters, put into
Baking oven, 90 DEG C are dried 8 hours, are subsequently placed in muffle furnace, within 4 hours, obtain finished catalyst in 810 DEG C of roastings.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[embodiment 8]
By 210.0 grams of iron oxide reds, 103.5 grams of iron oxide yellows, 65.0 grams of potassium carbonate, 120.0 grams of cerous nitrates, 4.8 grams of carbon
Acid cerium, 15.9 grams of ammonium molybdates, 5.6 grams of calcium carbonate and 4.0 grams of hydroxyethyl celluloses, 22.8 grams of carboxymethyl celluloses are in kneader
Stir 1 hour, add deionized water, then mix and stir half an hour, take out extrusion, be extruded into diameter 3 millimeters, length 5～10 millimeters
Grain, puts into baking oven, and 90 DEG C are dried 8 hours, are subsequently placed in muffle furnace, within 4 hours, obtain finished catalyst in 810 DEG C of roastings.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[embodiment 9]
By 214.0 grams of iron oxide reds, 112.8 grams of iron oxide yellows, 68.0 grams of potassium carbonate, 119.5 grams of cerous nitrates, 8.6 grams of carbon
Acid cerium, 14.5 grams of ammonium molybdates, 5.2 grams of calcium hydroxide, 9.8 grams of magnesium oxide and 18.5 grams of carboxymethyl celluloses stir in kneader
1 hour, add deionized water, then mix and stir half an hour, take out extrusion, be extruded into diameter 3 millimeters, length 5～the granule of 10 millimeters, put
Entering baking oven, 80 DEG C are dried 8 hours, are subsequently placed in muffle furnace, within 4 hours, obtain finished catalyst in 820 DEG C of roastings.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[embodiment 10]
By 198.0 grams of iron oxide reds, 143.2 grams of iron oxide yellows, 70.0 grams of potassium carbonate, 94.0 grams of cerous nitrates, 7.8 grams of carbonic acid
It is little that cerium, 10.2 grams of ammonium molybdates, 5.2 grams of calcium carbonate, 8.6 grams of magnesium oxide and 14.0 grams of carboxymethyl celluloses stir 1 in kneader
Time, add deionized water, then mix and stir half an hour, take out extrusion, be extruded into diameter 3 millimeters, length 5～the granule of 10 millimeters, put into
Baking oven, 90 DEG C are dried 8 hours, are subsequently placed in muffle furnace, within 6 hours, obtain finished catalyst in 810 DEG C of roastings.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[embodiment 11]
By 225.0 grams of iron oxide reds, 80.0 grams of iron oxide yellows, 68.0 grams of potassium carbonate, 92.0 grams of cerous nitrates, 10.0 grams of carbonic acid
Cerium, 10.2 grams of ammonium molybdates, 6.0 grams of calcium hydroxide, 5.0 grams of magnesium oxide and 16.0 grams of carboxymethyl celluloses stir 1 in kneader
Hour, add deionized water, then mix and stir half an hour, take out extrusion, be extruded into diameter 3 millimeters, length 5～the granule of 10 millimeters, put
Entering baking oven, 90 DEG C are dried 8 hours, are subsequently placed in muffle furnace, within 6 hours, obtain finished catalyst in 810 DEG C of roastings.
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
The percentage by weight composition of gained catalyst is as follows:
| Composition (%) | Fe2O3 | K2O | CeO2(deriving from cerous nitrate) | CeO2(deriving from cerous carbonate) | Mo2O3 | CaO | MgO | Cerous nitrate/cerous carbonate |
| Embodiment 1 | 73.46 | 10.74 | 10.60 | 0.37 | 2.22 | 1.26 | 1.36 | 28.65 |
| Embodiment 2 | 80.14 | 7.95 | 8.93 | 1.04 | 0.93 | 1.01 | - | 8.59 |
| Embodiment 3 | 77.82 | 11.12 | 7.59 | 1.61 | 1.86 | 1.29 | - | 4.71 |
| Embodiment 4 | 68.99 | 11.32 | 5.40 | 7.84 | 3.39 | 1.68 | 1.39 | 0.69 |
| Embodiment 5 | 72.42 | 9.45 | 11.09 | 0.62 | 3.17 | 3.26 | - | 17.89 |
| Embodiment 6 | 72.07 | 12.91 | 9.48 | 0.95 | 1.25 | 2.13 | 1.21 | 10.00 |
| Embodiment 7 | 65.65 | 12.86 | 11.04 | 1.12 | 4.75 | 1.03 | 3.56 | 9.88 |
| Embodiment 8 | 72.49 | 11.12 | 11.76 | 0.59 | 3.26 | 0.79 | - | 20.00 |
| Embodiment 9 | 71.00 | 10.95 | 11.02 | 0.99 | 2.79 | 0.93 | 2.32 | 11.11 |
| Embodiment 10 | 74.07 | 11.34 | 8.72 | 0.90 | 1.98 | 0.94 | 2.05 | 9.64 |
| Embodiment 11 | 72.92 | 11.95 | 9.26 | 1.26 | 2.15 | 1.17 | 1.29 | 7.36 |
[comparative example 1]
Catalyst is prepared, except that cerium source all uses cerous nitrate to be 103.5 grams by the method for [embodiment 1].
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
[comparative example 2]
Catalyst is prepared, except that cerium source all uses cerous carbonate to be 82.8 grams by the method for [embodiment 1].
Carrying out activity rating by the appreciation condition of [embodiment 1] and mechanical strength measures, test result is listed in table 1.
Table 1 catalyst performance contrasts
Above example illustrates, in the present invention, cerium source uses the mixture of cerous nitrate and cerous carbonate to be raw material, and with suitably
Proportioning join in catalytic component, the catalyst obtained is when ethyl benzene dehydrogenation preparation of styrene reacts, in low potassium situation
Under, catalyst is keeping greater activity and is optionally the most also having higher mechanical strength, and have preferable stability.
Claims (9)
1. a catalyst for phenylethylene dehydrogenation, includes consisting of by weight percentage:
(a) 65～the Fe of 81%2O3；
(b) 5～the K of 13%2O；
(c) 8～the CeO of 14%2；
(d) 0.5～the Mo of 5%2O3；
(e) 0.5～the CaO of 5%；
Wherein the raw material sources of cerium oxide are in cerous nitrate and cerous carbonate, and in terms of cerium oxide, cerous nitrate and the weight ratio of cerous carbonate
It is 2～18.
Catalyst for phenylethylene dehydrogenation the most according to claim 1, it is characterised in that in terms of cerium oxide, cerous nitrate and cerous carbonate
Weight ratio is 4～12.
Catalyst for phenylethylene dehydrogenation the most according to claim 1, it is characterised in that by weight percentage, Fe2O3Consumption be
70～78%, K2The consumption of O is 7～10%, CeO2Consumption be 9～12%, Mo2O3Consumption be 1～3.5%, the use of CaO
Amount is 1.5～4.5%.
4. the preparation method of catalyst for phenylethylene dehydrogenation described in claim 1, comprises the following steps: by weight percentage, by institute
Requirement cerium source and the desired amount of source of iron, potassium source, molybdenum source, alkaline earth oxide and perforating agent mix homogeneously, add water, make
Toughness, it is suitable for the dough thing of extrusion, through extrusion, molding, dried, roasting 0.5～24 hours at 500～1000 DEG C,
Preparing catalyst, wherein the raw material sources of cerium oxide are in cerous nitrate and cerous carbonate, and in terms of cerium oxide, cerous nitrate: cerous carbonate
Weight ratio is 2～18.
The preparation method of catalyst for phenylethylene dehydrogenation the most according to claim 4, it is characterised in that the Fe in catalyst2O3By oxygen
Changing iron oxide red and iron oxide yellow composition, K used adds with its salt or hydroxide form, Mo used adds with its salt or oxide form
Enter, alkaline-earth metal adds with its salt or oxide form.
The preparation method of catalyst for phenylethylene dehydrogenation the most according to claim 4, it is characterised in that in catalyst, perforating agent is selected from
At least one in graphite, polystyrene microsphere, methylcellulose, hydroxyethyl cellulose or carboxymethyl cellulose, its addition
For total catalyst weight 2～7%.
The preparation method of catalyst for phenylethylene dehydrogenation the most according to claim 4, it is characterised in that the baking temperature of catalyst is
50～120 DEG C, drying time is 2～24 hours.
The preparation method of catalyst for phenylethylene dehydrogenation the most according to claim 4, it is characterised in that the sintering temperature of catalyst is
600～870 DEG C, roasting time is 4～15 hours.
9. the catalyst for phenylethylene dehydrogenation described in claim 1 is in the reaction of ethyl benzene dehydrogenation preparation of styrene, and reaction condition is:
Reaction pressure is normal pressure, and reaction temperature is 580～640 DEG C, and liquid air speed is 0.5～2.0 hour-1, steam/ethylbenzene weight ratio
It is 1.0～3.0.
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| CN105478132B (en) * | 2014-10-13 | 2018-07-17 | 中国石油化工股份有限公司 | Catalyst for phenylethylene dehydrogenation of low-carbon type and its preparation method and application |
| CN108722430A (en) * | 2018-04-19 | 2018-11-02 | 天津理工大学 | Using nano-sized iron oxide as catalyst for phenylethylene dehydrogenation of source of iron and preparation method thereof |
| CN111054369B (en) * | 2018-10-16 | 2021-05-11 | 中国石油化工股份有限公司 | Catalyst for dehydrogenation of alkyl aromatic hydrocarbon |
| CN113877595B (en) * | 2020-07-01 | 2024-02-02 | 中国石油化工股份有限公司 | Dehydrogenation catalyst, preparation method and application thereof and method for dehydrogenating mixed diethylbenzene |
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| CN101992092A (en) * | 2009-08-31 | 2011-03-30 | 中国石油化工股份有限公司 | Catalyst for preparing styrene by dehydrogenizing ethylbenzene and preparation method thereof |
| CN102728371A (en) * | 2011-04-15 | 2012-10-17 | 廖仕杰 | High cerium content alkylaromatic dehydrogenation catalyst and preparation method thereof |
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