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Energy-saving catalyst for phenylethylene dehydrogenation

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 poor activity, achieve high activity, improve electronic The effect of transferability

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

[0005] The technical problem to be solved by the present invention is the shortcoming of the low-potassium catalyst in the prior art that has poor activity at low temperature, and a new catalyst for the preparation of styrene by dehydrogenation of ethylbenzene is provided

Method used

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  • Energy-saving catalyst for phenylethylene dehydrogenation
  • Energy-saving catalyst for phenylethylene dehydrogenation
  • Energy-saving catalyst for phenylethylene dehydrogenation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 350.0 grams of iron oxide red, 160.0 grams of iron oxide yellow, 62.0 grams of potassium carbonate, 92.3 grams of cerium nitrate, 13.8 grams of ammonium tungstate, 3.0 grams of magnesium oxide, 5.0 grams of tellurium dioxide, 3.0 grams of boron oxide, 0.2 grams of nickel oxide, Stir 5.0 grams of cement and 16.0 grams of sodium carboxymethylcellulose 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, and put them in Oven, bake at 80°C for 2 hours, bake at 120°C for 2 hours, then place in a muffle furnace, and bake at 900°C for 4 hours to obtain the finished catalyst.

[0028] 100 milliliters of catalysts are loaded into the reactor, at normal pressure, liquid space velocity 1.0 hours -1 , 600°C and 580°C, and the water ratio (water / ethylbenzene) (weight) 2.0 conditions for activity evaluation, the test results are listed in Table 1.

Embodiment 2

[0030] The catalyst is prepared according to the method of Example 1, except that 300.0 gram iron oxide red, 150.0 gram iron oxide yellow, 82.0 gram potassium carbonate, 40.0 gram cerium oxide, 4.0 gram tungsten oxide, 5.0 gram magnesium oxide, 10.0 gram carbon dioxide Tellurium, 6.0 grams of tin oxide, 2.0 grams of zirconia, 8.0 grams of kaolin, and 15.0 grams of graphite.

[0031] Activity evaluation was carried out according to the evaluation conditions of Example 1, and the test results are listed in Table 1.

Embodiment 3

[0033] The catalyst is prepared according to the method of Example 1, except that 280.0 gram iron oxide red, 138.0 gram iron oxide yellow, 70.0 gram potassium carbonate, 52.0 gram cerium oxide, 8.0 gram tungsten oxide, 10.0 gram magnesium oxide, 20.0 gram carbon dioxide Tellurium, 10.0 grams of tin oxide, 1.2 grams of copper oxide, 1.3 grams of zirconia, 15.0 grams of cement and 18.0 grams of sodium carboxymethylcellulose.

[0034] Activity 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 ethylbenzene dehydrogenation catalyst mainly solves the problems that the low-kalium catalyst in the prior art has poor activity under a low temperature condition. The invention adopts a technical proposal of inducing tellurium dioxide into a Fe-K-Ce-W-Mg system and the reaction temperature of the obtained catalyst is lower than the same catalyst by 5 to 10 DEG C. The present invention can be used for the industrial production of styrene by ethylbenzene dehydrogenation.

Description

technical field [0001] The invention relates to an energy-saving ethylbenzene dehydrogenation catalyst, in particular to an energy-saving ethylbenzene dehydrogenation catalyst suitable for use at a relatively low reaction temperature. Background technique [0002] As we all know, most of styrene is produced by catalytic dehydrogenation of ethylbenzene, and one of the keys of this method is the catalyst. The catalyzer of patent report divides two classes: a class is Fe-K-Cr series, as disclosed U.S. Patent 4134858,4152300,4144197, Chinese patent CN87100517, although the activity and stability of this class catalyzer are better, but because catalyzer contains Chromium, which is less environmentally friendly, 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 gre...

Claims

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Application Information

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IPC IPC(8): B01J23/888C07C5/333C07C15/46
Inventor 宋磊邬时海朱敏徐永繁缪长喜
Owner CHINA PETROLEUM & CHEM CORP
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