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Alkyl arene dehydrogenating catalyst

A technology for dehydrogenation catalysts and alkyl aromatic hydrocarbons, which can be used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbons, etc. Advanced problems, to achieve good technical effect, improve anti-coking performance, improve the effect of stability

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

[0005] The technical problem to be solved by the present invention is the problem that the catalyst in the prior art has low anti-coking ability and poor stability under the condition of low water ratio, and a new catalyst for dehydrogenation of alkyl aromatic hydrocarbons is provided

Method used

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  • Alkyl arene dehydrogenating catalyst
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 250.0 grams of iron oxide red, 130.0 grams of iron oxide yellow, 66.0 grams of potassium carbonate, 80.0 grams of cerium nitrate, 10.0 grams of ammonium aluminate, 12 grams of barium oxide, 4 grams of copper oxide, 2.0 grams of zinc oxide, 2.6 grams of manganese oxide, 2.0 grams Titanium oxide, 20.0 grams of cement, and 16.0 grams of carboxymethyl cellulose were first mixed by dry method for 1 hour, added deionized water, kneaded, extruded, extruded into particles with a diameter of 3 mm and a length of 8 to 10 mm, and put them in an oven for 80 Bake for 2 hours at 120°C and 2 hours at 120°C, then place in a muffle furnace for continuous activation in two stages: calcination at 100-500°C for 2 hours, and calcination at 500-1000°C for 4 hours to obtain the finished catalyst.

[0027] 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 follo...

Embodiment 2

[0029] The catalyst is prepared according to the method of Example 1, except that 423.0 gram iron oxide red, 210.0 gram iron oxide yellow, 65.0 gram potassium carbonate, 105.0 gram cerium oxalate, 10.0 gram ammonium molybdate, 22.0 gram barium oxide, 4.5 gram oxide Cobalt, 4.5 grams of nickel oxide, 1.1 grams of zirconia, 10.0 grams of cement, and 18.0 grams of carboxymethyl cellulose.

[0030] The activity evaluation was carried out according to the evaluation conditions of Example 1, and the activity evaluation results are listed in Table 1.

Embodiment 3

[0032] The catalyst is prepared according to the method of Example 1, except that 200.0 grams of iron oxide red, 220.0 grams of iron oxide yellow, 55.0 grams of potassium carbonate, 98.0 grams of cerium oxalate, 10.0 grams of ammonium molybdate, 5.5 grams of barium oxide, 5 grams of oxide Cobalt, 4.0 grams of manganese oxide, 2.0 grams of vanadium pentoxide, 26.0 grams of cement, and 18.0 grams of carboxymethyl cellulose.

[0033] The activity evaluation was carried out according to the evaluation conditions of Example 1, and the activity evaluation results are listed in Table 1.

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Abstract

The present invention relates to one kind of alkyl arene dehydrogenating catalyst and aims at raising the carbon deposit resistance and stability of the catalyst in low water ratio condition. The technological scheme of the present invention includes adding carbon deposit resisting assistant, active center regulator, selective assistant and metal oxide assistant to the Fe-K-Ce-Mo catalyst system. The catalyst system may be used in industrial alkyl arene dehydrogenating production.

Description

technical field [0001] The invention relates to a catalyst for dehydrogenation of alkylaromatic hydrocarbons, in particular to a catalyst for preparing styrene from ethylbenzene dehydrogenation. Background technique [0002] Ethylbenzene dehydrogenation is a reversible reaction with strong endothermic and molecular increase. In industry, water vapor is usually used as a diluent to reduce the partial pressure of ethylbenzene and promote the reaction to move to the product. The water ratio (the mass ratio of water vapor in the feed to ethylbenzene) is an important factor affecting the partial pressure of ethylbenzene and the reaction temperature, and is also a key indicator for examining energy consumption. Styrene production consumes a large amount of water vapor as a dehydrogenation medium, and the problems of high energy consumption and high production cost have always plagued the healthy development of the styrene industry. It is an urgen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/88B01J23/889C07C5/333C07C15/46
Inventor 宋磊缪长喜邬时海徐永繁甘明华
Owner CHINA PETROLEUM & CHEM CORP
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