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Dehydrogenation catalyst for preparing alkyl alkenyl arene

A technology for dehydrogenation catalysts and alkenyl aromatics, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbons, etc., can solve the problem of low crushing resistance of dehydrogenation catalysts, etc. problem, to achieve the effect of high activity and selectivity, high resistance to crushing force, and good technical effect

Active Publication Date: 2007-02-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problem that the dehydrogenation catalyst for preparing alkenyl aromatics with low potassium content has low crush resistance, and a new dehydrogenation catalyst for preparing alkenyl aromatics is provided

Method used

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  • Dehydrogenation catalyst for preparing alkyl alkenyl arene
  • Dehydrogenation catalyst for preparing alkyl alkenyl arene

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Experimental program
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Effect test

Embodiment 1

[0025] 210 grams of iron oxide red, 150 grams of iron oxide yellow, 70 grams of potassium carbonate, 3.5 grams of cerium oxalate, 88 grams of cerium nitrate, 14 grams of ammonium molybdate, 9.6 grams of magnesium oxide, 2.4 grams of manganese oxide, 1.2 grams of zinc oxide, 20 12 grams of cement and 12 grams of carboxymethyl cellulose were mixed evenly, and 180 grams of deionized water was added, and the wet material was kneaded to a dough-like object suitable for extrusion, extruded, cut into pellets, aged at room temperature for 10 hours, put into an oven, and dried at 80 °C for 6 hours, placed in a roaster, and roasted at 800 °C for 2 hours to obtain a finished catalyst. 100 ml of catalyst was loaded into the evaluation reactor, and the catalytic activity was evaluated at a reaction temperature of 620°C and a water ratio of 2.0, and the catalyst’s crush resistance, pass rate of boiling water test, and pass rate of cold water test were measured. Test results: the conversion ...

Embodiment 2

[0027] 210 grams of iron oxide red, 150 grams of iron oxide yellow, 70 grams of potassium carbonate, 9.2 grams of cerium oxalate, 82 grams of cerium nitrate, 14 grams of ammonium molybdate, 9.6 grams of magnesium oxide, 2.4 grams of manganese oxide, 1.2 grams of zinc oxide, 20 gram cement, 12 gram carboxymethyl cellulose are mixed homogeneously, prepare and measure by the method for embodiment 1. Test results: Ethylbenzene conversion rate is 79.3%, styrene selectivity is 95.4%, styrene yield is 75.7%, crush resistance is 122N, boiling water test is qualified, and cold water test is qualified.

Embodiment 3

[0029] 210 grams of iron oxide red, 150 grams of iron oxide yellow, 70 grams of potassium carbonate, 15 grams of cerium oxalate, 78 grams of cerium nitrate, 14 grams of ammonium molybdate, 9.6 grams of magnesium oxide, 2.4 grams of manganese oxide, 1.2 grams of zinc oxide, 20 gram cement, 12 gram carboxymethyl cellulose are mixed homogeneously, prepare and measure by the method for embodiment 1. Test results: The conversion rate of ethylbenzene is 79.5%, the selectivity of styrene is 95.3%, the yield of styrene is 75.8%, the crushing resistance is 121N, the boiling water test is qualified, and the cold water test is qualified.

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Abstract

A dehydrocatalyst for preparing alkenyl arylhydrocarbon has low content of K and high activity, selectivity and compression strength, and features that in the Fe-K-Ce-Mo catalyst system, the Ce component is cerium nitrate and / or cerium oxalate (or hydroxide).

Description

technical field [0001] The present invention relates to a dehydrogenation catalyst for the preparation of alkenyl arenes, in particular to a dehydrogenation catalyst for the preparation of styrene. Background technique [0002] At present, most of the dehydrogenation catalysts for the industrial preparation of alkenyl aromatics are Fe-K-Ce-Mo catalysts, such as CN1028495C and CN1050535C. quite high. For example, CN1028495C is a dehydrogenation catalyst for alkylaromatics. Its composition is in the iron-potassium-cerium-molybdenum system, adding a variety of metal oxides. Received as 71.9%, ethylbenzene conversion rate is 74.4%, styrene selectivity is 96.6%, but in the catalyst component K 2 The O content is as high as about 30%. Due to the strong water absorption of potassium, when the catalyst is placed in the air, the catalyst with high potassium content is easy to absorb water, which reduces the crush resistance of the catalyst particles and...

Claims

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Application Information

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IPC IPC(8): B01J23/88B01J23/887C07C5/327C07C5/42C07C15/44
Inventor 范勤毛连生
Owner CHINA PETROLEUM & CHEM CORP
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