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Oxide catalyst used in ethyl benzene dehydrogen for preparing phenyl ethylene

A technology of ethylbenzene dehydrogenation and catalyst, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, hydrocarbon, etc. It can solve the problems of ineffective reduction of by-products, catalyst activity, and poor selectivity And other issues

Active Publication Date: 2006-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main problem to be solved by the present invention is that the activity and selectivity of the catalyst in the prior art are poor, and the by-products in the production process cannot be effectively reduced, and a new oxide catalyst for the preparation of styrene by ethylbenzene dehydrogenation is provided

Method used

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  • Oxide catalyst used in ethyl benzene dehydrogen for preparing phenyl ethylene
  • Oxide catalyst used in ethyl benzene dehydrogen for preparing phenyl ethylene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 307.2 grams of ordinary iron oxide, 59.6 grams of potassium carbonate, 53.7 grams of cerium carbonate with a particle size of 4 microns, 23.2 grams of molybdenum oxide, 15.1 grams of magnesium oxide, 60.4 grams of cement, and 25.7 grams of carboxymethyl cellulose were stirred in a kneader After 1 hour, add deionized water, stir for another half an hour, take out the extruded strips, extrude them into particles with a diameter of 3 mm and a length of 8 to 10 mm, put them in an oven, bake at 80°C for 2 hours, and at 120°C for 2 hours, then place The catalyst was prepared by calcining at 900°C for 4 hours in a muffle furnace.

[0026] The evaluation conditions of the catalyst are as above, the evaluation results are shown in Table 1, and the weight percentage composition of the catalyst is shown in Table 2.

Embodiment 2～9

[0028] The preparation method of embodiment 2~9, the composition of catalyst are the same as embodiment 1, just oxidation precursor and particle size are different, and wherein embodiment 2 and 3 take acid cerium as precursor and its particle size is respectively 8 and 16 microns, embodiment 4, 5 and 6 with 48.5 g Ce(OH) 4 Its particle size is respectively 4,8,16 micron for precursor, and embodiment 7,8 and 9 are with 127.3 gram Ce 2 (C 2 o 4 ) 3 Its particle size is respectively 4, 8, 16 microns for precursor, the evaluation condition of catalyst is as above-mentioned, and its evaluation result is shown in Table 1, and its catalyst weight percent composition is shown in Table 2, wherein the catalyst stability data of embodiment 7 sees table 3.

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Abstract

An oxide catalyst for preparing styrene from ethylbenzene by dehydrogenation features that at least one of Ce(OH)4, Ce2(C2O4)3, and Ce3(CO3)3 is introduced to the Fe-K-Ce-Mo system for higher activity and selectivity.

Description

technical field [0001] The invention relates to an oxide catalyst for preparing styrene by dehydrogenating ethylbenzene. Background technique [0002] The production of alkenyl aromatics is achieved industrially by the dehydrogenation of alkyl aromatics. The basic composition of the catalyst used is a main catalyst, a co-catalyst, a porogen, a reinforcing agent, and the like. Catalysts reported in patents can be divided into two broad categories. A class is the Fe-K series catalyst that contains Cr, as disclosed U.S. Patent 4467046, 4684619, European Patent 0195252A2, although the activity and stability of this type of catalyst are better, due to the oxidation of Cr more or less exists in the composition Therefore, the catalyst preparation, operation and waste catalyst treatment process will cause certain environmental pollution, which has been gradually eliminated. The other is the Fe-K-Ce-Mo series successfully developed in the early 1980s...

Claims

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Application Information

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IPC IPC(8): B01J23/881B01J23/88B01J21/10B01J23/04B01J23/745B01J23/10C07C15/46C07C5/333B01J23/889
CPCY02P20/52
Inventor 杨诚廖仕杰朱敏缪长喜
Owner CHINA PETROLEUM & CHEM CORP