Dehydrogenating catalyst for preparing alkyl alkenyl arene

A technology for dehydrogenation catalysts and alkenyl aromatics, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrocarbons, etc. Low capacity, easy migration and loss of potassium, etc., to achieve the effect of long-term operation, good activity and selectivity, and strong anti-coking ability

Active Publication Date: 2006-08-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the potassium in the catalyst existing in the prior art is easy to migrate and lose during the reaction process, the anti-coking ability of the catalyst is not high, and the problem of affecting the service life of the catalyst is provided. A new method for preparing alkanes is provided. Dehydrogenation Catalysts of Alkenyl Arenes

Method used

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  • Dehydrogenating catalyst for preparing alkyl alkenyl arene
  • Dehydrogenating catalyst for preparing alkyl alkenyl arene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 260.0 grams of iron oxide red, 118.0 grams of iron oxide yellow, 50.0 grams of potassium carbonate, 60.0 grams of potassium feldspar, 100.0 grams of cerium nitrate, 11.5 grams of ammonium molybdate, 7.8 grams of lanthanum oxide, 6.0 grams of magnesium oxide, 3.6 grams of copper oxide, Stir 2.6 grams of tin oxide, 24.0 grams of cement, and 12.0 grams of carboxymethyl cellulose in a kneader for 1 hour, add deionized water, and stir for another half an hour, take out the extruded strips, and extrude them into 3 mm in diameter and 8 to 10 mm in length. The particles were put into an oven, baked at 80°C for 2 hours and at 120°C for 2 hours, then placed in a muffle furnace, and calcined at 900°C for 4 hours to obtain a finished catalyst.

[0032] 100 milliliters of catalysts were loaded into the reactor, and the activity evaluation was carried out under the condition of low water ratio. The catalyst evaluation conditions were as follows: normal pressure, liquid space velocity ...

Embodiment 2

[0034] The catalyst is prepared according to the method of Example 1, except that 340.0 gram iron oxide red, 150.0 gram iron oxide yellow, 40.0 gram potassium carbonate, 90.0 gram potassium feldspar, 64.3 gram cerium oxalate, 5.0 gram ammonium molybdate, 7.8 gram Lanthanum oxide, 8.0 grams of magnesium oxide, 1.6 grams of copper oxide, 2.6 grams of lead oxide, 24.0 grams of cement, and 12.0 grams of carboxymethyl cellulose.

[0035] Activity evaluation was carried out according to the conditions of Example 1, and the evaluation results are listed in Table 1.

Embodiment 3

[0037] The catalyst is prepared according to the method of Example 1, except that 240.0 gram iron oxide red, 150.0 gram iron oxide yellow, 55.0 gram salt of wormwood, 160.0 gram potassium feldspar, 125.0 gram cerium nitrate, 10.0 gram ammonium molybdate, 16.1 gram Lanthanum oxide, 6.4 grams of magnesium oxide, 3.2 grams of tin oxide, 2.6 grams of nickel oxide, 26.0 grams of cement, and 18.0 grams of carboxymethyl cellulose.

[0038] Activity evaluation was carried out according to the conditions of Example 1, and the evaluation results are listed in Table 1.

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Abstract

The present invention relates to one kind of alkyl arene preparing dehydrogenating catalyst and aims at avoiding potassium loss of catalyst during reaction, raising the carbon deposit resistance of catalyst and increasing catalyst life. The technological scheme of the present invention includes replacing partial soluble potassium compound in the Fe-K-Ce-Mo catalyst system with potash feldspar, and adding carbon separation resisting assistant to inhibit carbon separation reaction to the Fe-K-Ce-Mo catalyst system. The dehydrogenating catalyst system may be used in industrial alkyl arene preparing production.

Description

technical field [0001] The present invention relates to a dehydrogenation catalyst for the preparation of alkenyl aromatics, in particular to a catalyst for the dehydrogenation of ethylbenzene to styrene. Background technique [0002] Ethylbenzene dehydrogenation is a reversible reaction with strong endothermic and molecular increase. In the industry, inert gas is usually used as a diluent to reduce the partial pressure of ethylbenzene and promote the reaction to move to the product. The role of water vapor in the production of styrene is reflected in: [0003] (1) Heating the reaction raw materials to the required temperature, avoiding directly heating ethylbenzene to a higher temperature, and suppressing the generation of side reactions; [0004] (2) Supplement heat to avoid cooling due to endothermic reaction; [0005] (3) reduce the partial pressure of ethylbenzene and promote the equilibrium to move to the direction of styrene; [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/88B01J27/19C07C5/333C07C15/46
Inventor 宋磊徐永繁缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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