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Energy-saving catalyst for preparing phenylethylene from dehydrogenation of ethylbenzene

An ethylbenzene dehydrogenation production and catalyst technology, which can be used in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, hydrocarbons, etc. The effect of improving stability, preventing accumulation, and enhancing adsorption capacity

Active Publication Date: 2008-10-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the low-potassium catalyst in the prior art has the disadvantages of easy carbon deposition and poor stability under low water ratio conditions, and provides a new energy-saving catalyst for the preparation of styrene by dehydrogenation of ethylbenzene

Method used

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  • Energy-saving catalyst for preparing phenylethylene from dehydrogenation of ethylbenzene
  • Energy-saving catalyst for preparing phenylethylene from dehydrogenation of ethylbenzene
  • Energy-saving catalyst for preparing phenylethylene from dehydrogenation of ethylbenzene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 328.0 grams of iron oxide red, 136.0 grams of iron oxide yellow, 70.0 grams of potassium carbonate, 113.4 grams of cerium oxalate, 7.2 grams of ammonium tungstate, 11.0 grams of magnesium oxide, 9.0 grams of nickel oxide, 12.0 grams of lanthanum oxide and 13.0 grams of cement and 18.2 grams Sodium carboxymethyl cellulose was stirred in a kneader for 1 hour, added deionized water, stirred for half an hour, took out the extruded strips, extruded into granules with a diameter of 3 mm and a length of 5-10 mm, put them in an oven, and baked at 80 ° C for 2 hours , baked at 120°C for 2 hours, then placed in a muffle furnace, and fired at 950°C for 4 hours to obtain the finished catalyst.

[0034] 100 milliliters of catalysts are loaded into the reactor, at normal pressure, liquid space velocity 1.0 hours -1 , 620°C, and water ratio (weight) 1.6 for performance evaluation, the test results are listed in Table 1.

Embodiment 2

[0036] Prepare catalyst by the method for embodiment 1, difference is 370.0 gram iron oxide red, 160.0 gram iron oxide yellow, 63.0 gram potassium carbonate, 94.9 gram cerium nitrate, 5.8 gram ammonium tungstate, 5.0 gram magnesium oxide, 8.0 gram nickel oxide , 12.8 grams of samarium nitrate, 11.4 grams of strontium carbonate, 9.0 grams of kaolin and 19.0 grams of graphite.

[0037] Performance evaluation was carried out according to the evaluation conditions of Example 1, and the test results are listed in Table 1.

Embodiment 3

[0039] Prepare catalyst by the method for embodiment 1, difference is 320.0 gram iron oxide red, 150.0 gram iron oxide yellow, 82.0 gram potassium carbonate, 86.6 gram cerium oxalate, 13.8 gram ammonium tungstate, 8.0 gram magnesium oxide, 13.0 gram nickel oxide , 10.0 grams of lanthanum oxide, 3.0 grams of strontium oxide, 15.0 grams of cement and 17.3 grams of sodium carboxymethylcellulose.

[0040] Performance evaluation was carried out according to the evaluation conditions of Example 1, and the test results are listed in Table 1.

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Abstract

The present invention relates to an energy-saving catalyst for preparing styrene by ethylbenzene dehydrogenation which mainly solves the problems that the low-kalium catalyst in the prior technology is easy to accumulate carbon and has poor stability under a low water-ratio condition. The present invention adopts a technical proposal of adding nickel oxide and another light rare earth oxide into a Fe-K-Ce-W-Mg system, thus better solving the problem. The present invention can be used for the industrial production of styrene by ethylbenzene dehydrogenation under the lower water ratio condition.

Description

technical field [0001] The invention relates to an energy-saving catalyst for producing styrene by dehydrogenation of ethylbenzene, in particular to an energy-saving catalyst for producing styrene by dehydrogenation of ethylbenzene suitable for use at a relatively low water ratio (water / ethylbenzene). Background technique [0002] The main reaction for the dehydrogenation of ethylbenzene is C 6 h 5 -C 2 h 5 →C 6 h 5 CH=CH 2 +H 2 +124KJ / mol, reducing the partial pressure of ethylbenzene is beneficial to the balance, so water vapor is usually used as a diluent in industry to promote the reaction to move towards the product. Water vapor also has the following effects: [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) The carbon deposition on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C07C5/333C07C15/46
Inventor 宋磊缪长喜邬时海危春玲徐永繁
Owner CHINA PETROLEUM & CHEM CORP