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Low-temperature ethylbenzene dehydrogenation catalyst

A technology of ethylbenzene dehydrogenation and catalyst, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, hydrocarbons, etc., can solve the problems of low potassium catalyst activity and achieve improved electronic performance Transmission channels, improve activity, improve the effect of alkalinity

Inactive Publication Date: 2011-03-30
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 of low activity of low-potassium catalysts existing in the prior art under low temperature conditions, and a new catalyst for the preparation of styrene by dehydrogenation of ethylbenzene is provided

Method used

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  • Low-temperature ethylbenzene dehydrogenation catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 320.0 grams of iron oxide red, 100.0 grams of iron oxide yellow, 50.0 grams of potassium carbonate, 85.0 grams of cerium oxalate, 5.0 grams of ammonium tungstate, 23.0 grams of magnesium oxide, 23.0 grams of selenium oxide, 10.0 grams of holmium oxide, 12.2 grams of cement and 22.0 grams Stir the sodium carboxymethyl cellulose in a kneader for 1 hour, add deionized water, and stir for another half an hour, take out the extruded strips, extrude them into granules with a diameter of 3 mm and a length of 5 to 8 mm, put them in an oven, and bake at 110 ° C for 2 hour, then placed in a muffle furnace, roasted at 300°C for 2 hours, and roasted at 900°C for 4 hours to obtain a finished catalyst. The weight percent composition of the catalyst is listed in Table 1.

[0029] 100 milliliters of catalysts are loaded into the reactor, at normal pressure, liquid space velocity 1.0 hours -1 , 610°C and 580°C, and water ratio (weight) 2.0, the activity evaluation was carried out, and t...

Embodiment 2

[0031] Prepare catalyst by the method for embodiment 1, difference is with 200.0 gram iron oxide red, 180.0 gram iron oxide yellow, 85.0 gram potassium carbonate, 116.3 gram cerium nitrate, 8.3 gram tungsten oxide, 8.0 gram magnesium oxide, 8.0 gram selenium oxide , 0.4 gram of titanium oxide, 10.6 gram of erbium oxide, 10.4 gram of holmium oxide, 22.2 gram of kaolin and 32.5 gram of graphite, the weight percent composition of gained catalyst is listed in Table 1.

[0032] Activity evaluation was carried out according to the evaluation conditions of Example 1, and the test results are listed in Table 2.

Embodiment 3

[0034] Prepare the catalyst according to the method of Example 1, except that 310.0 grams of iron oxide red, 160.0 grams of iron oxide yellow, 63.6 grams of potassium carbonate, 59.5 grams of cerium carbonate, 9.0 grams of ammonium tungstate, 4.0 grams of magnesium oxide, 5.0 grams of oxide Selenium, 13.5 grams of thulium oxide, 19.2 grams of diatomaceous earth and 17.2 grams of polystyrene microspheres, the weight percentage composition of the catalyst is listed in Table 1.

[0035] Activity evaluation was carried out according to the evaluation conditions of Example 1, and the test results are listed in Table 2.

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Abstract

The invention relates to a low-temperature ethylbenzene dehydrogenation catalyst which mainly ensures that the problem in the prior art that the catalytic activity of low-potassium catalyst is low at low temperature is solved. The technical scheme of the invention is as follows: adding selenium oxide and at least one rare earth oxide of Ho2O3, Er2O3, Tm2O3, Yb2O3 or Lu2O3 to a Fe-k-Ce-W-Mg catalytic system to better solve the problem in the prior art. The low-temperature ethylbenzene dehydrogenation catalyst of the invention can be used in the industrial production of preparing phenylethylene by ethylbenzene dehydrogenation.

Description

technical field [0001] The invention relates to a low-temperature ethylbenzene dehydrogenation catalyst. Background technique [0002] As we all know, about 90% of styrene in industry is produced by catalytic dehydrogenation of ethylbenzene, and one of the keys of this method is the catalyst. There are two types of catalysts reported in patents: one is Fe-K-Cr series, such as published U.S. Patents 4,134,858, 4,152,300, and 4,144,197. Although the activity and stability of this type of catalyst are better, they are not environmentally friendly because they contain Chromium, has been phased out. The other is Fe-K-Ce-Mo series, such as published U.S. Patent 4804799, European Patent 0502510A1, 0297685A1, 0305020A1, this type of catalyst not only replaces Cr with Ce, Mo, but also has higher activity and stability than the former It has been greatly improved and has been adopted by styrene manufacturers in various countries. Its main problem is that the reaction temperature is ...

Claims

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Application Information

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IPC IPC(8): B01J27/057B01J23/888B01J23/83B01J23/78C07C15/46C07C5/333
Inventor 宋磊陈铜危春玲缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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