Unlock instant, AI-driven research and patent intelligence for your innovation.

Dehydrogenation catalyst for preparing styrene, preparation method and application thereof, and ethylbenzene dehydrogenation method

A dehydrogenation catalyst, styrene technology, applied in metal/metal oxide/metal hydroxide catalyst, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problem that the catalyst is not resistant to high space velocity and high content of by-products , low catalyst cost and other issues

Active Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of high cost of noble metal catalysis or poor styrene selectivity, low ethylbenzene conversion rate and high content of by-products and conventional catalysts that are not resistant to high space velocity when using noble metal catalysts in the prior art. , provide a dehydrogenation catalyst for preparing styrene, its preparation method and application, and an ethylbenzene dehydrogenation method, the dehydrogenation catalyst for preparing styrene does not contain noble metals, and the cost of the catalyst is low. Not only that, the present invention Even in the case of high-quality space velocity, the invented catalyst has good catalytic selectivity and conversion rate of ethylbenzene, and the content of benzene in the product is low, which has the advantage of saving energy and reducing consumption

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Dehydrogenation catalyst for preparing styrene, preparation method and application thereof, and ethylbenzene dehydrogenation method
  • Dehydrogenation catalyst for preparing styrene, preparation method and application thereof, and ethylbenzene dehydrogenation method
  • Dehydrogenation catalyst for preparing styrene, preparation method and application thereof, and ethylbenzene dehydrogenation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0031] In a preferred embodiment of the invention, the dehydrogenation catalyst also contains B 2 O 3 , preferably B 2 O 3 The content of is 0.05-0.5% by weight, further preferably 0.2-0.4% by weight. In this embodiment, the catalyst has higher selectivity and ethylbenzene conversion even in the case of high mass space velocity, and the content of benzene in the product is lower.

[0032] According to the invention, the catalyst can adopt the above element types and ratios, and can also add other additives, such as TiO 2 The invention can be realized. Preferably, TiO is contained in the catalyst 2 The content of TiO is 0.3-1.5% by weight, further preferably TiO 2 The content of is 0.5-1% by weight.

[0033] In a preferred embodiment of the invention, the catalyst does not contain molybdenum oxide.

[0034] In a preferred embodiment of the invention, the catalyst does not contain binder; Without binder, the catalyst showed better catalytic selectivity and ethylbenzene conversion, a...

Embodiment 1

[0072] In terms of oxide, it will be equivalent to 57.16 parts by weight of Fe 2 O 3 Iron oxide red, equivalent to 14.67 parts by weight of Fe 2 O 3 Iron oxide yellow, equivalent to 3.36 parts by weight of K 2 Potassium carbonate of O, equivalent to 8.76 parts by weight of CEO 2 Cerium acetate, equivalent to 2.76 parts by weight of wo 3 Ammonium tungstate, magnesium hydroxide equivalent to 3.3 parts by weight of MgO, barium carbonate equivalent to 3.7 parts by weight of Bao, and 2.86 parts by weight of Li 2 O. 1.32 parts by weight sb 2 O 5 0.3 parts by weight B 2 O 3 And 5.2 parts by weight of graphite were stirred in a kneader for 0.5h, and 1.81 parts by weight of K was added 2 O, stir again for 0.8h, and add the catalytic element sources (iron oxide red, iron oxide yellow, potassium carbonate, cerium acetate, ammonium tungstate, magnesium hydroxide, barium carbonate and Li) of the catalyst calculated by oxide 2 O、Sb 2 O 5 And B 2 O 3 ）Deionized water with a total weight of 23.9%...

Embodiment 2

[0082] The dehydrogenation catalyst was prepared according to the method of example 1, except that the same amount of Nb was used 2 O 5 Replace sb 2 O 5 , the preparation method, evaluation conditions and analysis method of the catalyst are the same as those in example 1, and the composition of the catalyst is listed in Table 1. The evaluation results are listed in Table 3 and table 4 respectively.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of catalyst preparation, and discloses a dehydrogenation catalyst for preparing styrene, a preparation method and application of the dehydrogenation catalyst and an ethylbenzene dehydrogenation method.Based on the total amount of the dehydrogenation catalyst, the dehydrogenation catalyst contains 74-95 wt% of oxides of main catalytic elements, 0.8-5 wt% of WO3, 0.7-5 wt% of MgO and 0.5-5 wt% of BaO, the main catalytic elements comprise, by weight, 0.5-7% of Li2O and 0.5-5% of V-group metal element oxides, and the main catalytic elements comprise a Fe element, a K element and a Ce element; wherein the alkali content of the catalyst ranges from 0.387 mmol / g to 0.455 mmol / g. The catalyst has good catalytic selectivity and ethylbenzene conversion rate even under the condition of high mass airspeed, the content of benzene in the product is low, and the catalyst has the advantages of energy conservation and consumption reduction.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a dehydrogenation catalyst for preparing styrene, a preparation method and application thereof, and a method for dehydrogenation of ethylbenzene with the catalyst. Background technology [0002] The main reaction of ethylbenzene dehydrogenation is C 6 H 5 -C 2 H 5 →C 6 H 5 CH＝CH 2 +H 2 +124kj / mol, toluene and benzene are the main by-products. At present, the industrial catalysts for dehydrogenation of alkyl aromatics are mostly Fe-K-Ce-Mo catalysts, such as zl91109968 9、ZL95113340. 3. This kind of catalyst has high activity and selectivity, but K as cocatalyst in the component 2 The content of O is quite high. Such as zl91109968 9 is a dehydrogenation catalyst for alkyl aromatics. Its composition is that a variety of metal oxides are added to the iron potassium cerium molybdenum system. Specifically, its composition is Fe in weight percentage 2 O 4 40-70％，K 2 CO 3 10-40...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J35/10C07C5/333C07C15/46
CPCB01J23/888B01J23/002C07C5/3332B01J2523/00B01J35/60B01J2523/11B01J2523/13B01J2523/22B01J2523/25B01J2523/305B01J2523/3712B01J2523/53B01J2523/69B01J2523/842B01J2523/56B01J2523/55B01J2523/47C07C15/46Y02P20/52
Inventor 宋磊朱敏缪长喜张征湃徐永繁
Owner CHINA PETROLEUM & CHEM CORP