Alkyl aromatics dehydrogen catalyst

A technology for dehydrogenation catalysts and alkylaromatics, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbons, etc., can solve the problem of low catalyst activity and selectivity, and catalyst potassium content Advanced problems, to achieve the effect of high activity and product selectivity

Inactive Publication Date: 2006-12-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main problem to be solved by the present invention is that there are problems in the prior art that the catalyst potassium content used is high or the activity and selectivity of the catalyst are low, and a new alkylaromatic dehydrogenation catalyst is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 252.0 grams of iron oxide red, 136.8 grams of iron oxide yellow, 80.8 grams of potassium carbonate, 105.8 grams of cerium nitrate, 7.5 grams of molybdenum oxide, 9.0 grams of magnesium oxide, 6.0 grams of calcium oxide, 2.5 grams of niobium oxide, 3.0 grams of copper oxide, 2.0 grams Nickel oxide, 30.0 grams of cement, and 15.0 grams of carboxymethyl cellulose were stirred in a kneader for 1 hour, added deionized water, and stirred for another half an hour, taken out and extruded into particles with a diameter of 3 mm and a length of 8 to 10 mm. , placed in an oven, baked at 80°C for 2 hours, baked at 120°C for 2 hours, then placed in a muffle furnace, and calcined at 900°C for 4 hours to obtain a catalyst with the following active composition in weight percent.

[0029] Fe 2 o 3 75.0

[0030] K 2 O 11.0

[0031] Ce 2 o 3 8.0

[0032] MoO 3 1.5

[0033] MgO 1.8

[0034] CaO 1.2

[0035] ...

Embodiment 2

[0041] Prepare catalyst by the method for embodiment 1, difference is with 245.0 gram iron oxide red, 132.37 gram iron oxide yellow, 79.3 gram potassium carbonate, 124.34 gram cerium nitrate, 11.04 gram ammonium molybdate, 9.5 gram magnesium oxide, 16.07 gram carbonic acid Calcium, 4.0 grams of niobium oxide, 2.0 grams of zinc oxide, 1.5 grams of boron and 32.0 grams of cement, 20.0 grams of carboxymethyl cellulose. The active composition of the catalyst obtained is as follows in weight percent:

[0042] Fe 2 o 3 72.8

[0043] K 2 O 10.8

[0044] Ce 2 o 3 9.4

[0045] MoO 3 1.8

[0046] MgO 1.9

[0047] CaO 1.8

[0048] Nb 2 o 5 0.8

[0049] ZnO 0.4

[0050] B 2 o 3 0.3

[0051] 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

[0053] Prepare catalyst by the method for embodiment 1, difference is with 248.0 gram iron oxide red, 135.15 gram iron oxide yellow, 80.03 gram salt of wormwood, 112.43 gram cerium nitrate, 7.36 gram ammonium molybdate, 8.0 gram magnesium oxide, 29.54 gram nitric acid Calcium, 9.0 grams of niobium oxide, 2.0 grams of tin oxide, 1.5 grams of aluminum oxide, 28.0 grams of cement, and 16.0 grams of carboxymethyl cellulose. The active composition of the catalyst obtained is as follows in weight percent:

[0054] Fe 2 o 3 73.9

[0055] K 2 O 10.9

[0056] Ce 2 o 3 8.5

[0057] MoO 3 1.2

[0058] MgO 1.6

[0059] CaO 1.4

[0060] Nb 2 o 5 1.8

[0061] SnO 2 0.4

[0062] Al 2 o 3 0.3

[0063] 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

A dehydrocatalyst for alkylarylhydrocarbon features that the oxide of Nd is introduced to the Fe-K-Ce-Mo-Mg catalyst system for high activity and selectivity. It can be used to prepare alkylenyl arylhydrocarbon from alkyl arylhydrocarbon by dehydrogenation.

Description

technical field [0001] The present invention relates to a catalyst for the dehydrogenation of alkylaromatic hydrocarbons, in particular to a catalyst for dehydrogenating ethylbenzene to produce styrene. Background technique [0002] Generally, alkenyl aromatics are produced industrially by catalytic dehydrogenation of alkyl aromatics, and the catalyst used is an iron-based catalyst with iron oxide as the main active component and potassium oxide as the main promoter. As we all know, potassium can increase the activity of iron oxide by an order of magnitude, and can promote the water gas reaction to eliminate carbon deposits and make the catalyst self-regenerate. Therefore, since the first generation of iron-based catalysts, potassium has been included in the composition. [0003] The "energy crisis" in the early 1980s caused the cost of steam in the production of alkenyl aromatics to rise sharply, and high-potassium energy-saving catalysts came...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/881B01J23/88B01J21/10B01J23/04B01J23/745B01J23/10B01J23/20C07C15/46C07C5/333
Inventor 宋磊缪长喜徐永繁杨诚毛连生
Owner CHINA PETROLEUM & CHEM CORP
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