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Method for preparing alkyl aromatics dehydrogenation catalyst

A technology for dehydrogenation catalysts and alkyl aromatic hydrocarbons, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc. And other issues

Inactive Publication Date: 2005-01-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a new method for preparing alkylaromatic dehydrogenation catalysts in order to overcome the shortcomings of catalyst reactivity and water resistance in previous literatures.

Method used

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  • Method for preparing alkyl aromatics dehydrogenation catalyst
  • Method for preparing alkyl aromatics dehydrogenation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0024] 232.2 grams of iron oxide red, 172.4 grams of iron oxide yellow, 77.8 grams of potassium carbonate, 82.1 grams of cerium nitrate, 7.5 grams of molybdenum oxide, 20.0 grams of magnesium oxide, 25 grams of cement, and 10.0 grams of carboxymethyl cellulose were stirred in a kneader 1 hour, add deionized water, stir for another 0.5 hours, take out the extruded strips, extrude them into particles with a diameter of 3 mm and a length of 8-10 mm, put them in an oven, dry at a certain temperature for a certain period of time, and then place them in a muffle furnace. Calcination at a certain temperature for a certain period of time to prepare the catalyst. The preparation method of embodiment 2,3, charging amount are the same as embodiment 1, just drying temperature, time and roasting temperature, roasting time are different.

[0025] Catalyst preparation charging amount is:

[0026] Raw material Feeding amount, grams

[0027] Fe 2 o 3 ...

Embodiment 1

[0037] Example 1 80 10 810 8

Embodiment 2

[0038] Example 2 90 8 850 6

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Abstract

The present invention relates to a method for preparing alkyl aromatics dehydrogenation catalyst. It is mainly aimed at resolving the problems of previous technology in which its catalyst can not simultaneously have the reaction performance and water-proofing property. Said invention utilizes the adoption of the invented technical scheme of raising roasting temp. and prolonging roasting time to better resolve the above-mentioned problems.

Description

technical field [0001] The invention relates to a method for preparing an alkylaromatic dehydrogenation catalyst. Background technique [0002] Generally, alkenyl aromatics are produced industrially by catalytic dehydrogenation of alkyl aromatics. One of the keys to this method is to select a dehydrogenation catalyst with high activity, high selectivity and high stability. At present, Fe-K-Ce-Mo-Mg series catalysts are commonly used in industry, Fe 2 o 3 is the main active component, K 2 O is one of the most important activity accelerators, and its addition can increase the activity of iron-based catalysts by an order of magnitude. K 2 While the introduction of O effectively improves the reaction performance of the catalyst, there are also some problems such as the catalyst is very sensitive to water vapor, especially liquid water, during the preparation, transportation, and filling process. In addition, during the dehydrogenation process,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/74C07C4/12
Inventor 缪长喜单明杨城毛连生
Owner CHINA PETROLEUM & CHEM CORP