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Catalyst for hydrogenating cis-butenedioic anhydride to prepare butanedioic anhydride and its prepn and application

A technology for preparing succinic anhydride and catalyst, which is applied in the direction of carboxylic anhydride preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., which can solve the difficulty and high price of Ru-P complex synthesis , Ru-P complex solvent is difficult to separate and other problems, to achieve the effect of high activity and selectivity, easy separation, high space-time yield

Inactive Publication Date: 2003-11-05
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the reaction conditions are relatively mild, it is difficult to separate the Ru-P complex from the product and the solvent, and the synthesis of the Ru-P complex is difficult and expensive.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take the Ni(NO 3 ) 2 Solution 6.4ml 30ml tetraethyl orthosilicate, 15ml acetic acid, 75ml ethanol, 1.3ml water, stir evenly, heat at 80°C to form a gel, dry in an oven at 100-120°C, and stir intermittently, place in a muffle furnace at 400°C Roasting at ℃ for 3 hours, naturally down to room temperature, under hydrogen flow (hydrogen volume space velocity 300-500h -1 ) at 580°C for 3 hours, and naturally cooled to room temperature, the catalyst was uniformly dark black.

Embodiment 2

[0021] Take Ni(NO 3 ) 2 .6H 2 O 17g of ethyl orthosilicate 30ml, 15ml of acetic acid dissolved in 75ml of ethanol, add 1.4ml of water and stir evenly, heat at 80°C to form a gel, dry in an oven at 100-120°C, and stir intermittently, place in a muffle furnace at 500°C Roasting at ℃ for 3 hours, naturally down to room temperature, under hydrogen flow (hydrogen volume space velocity 300-500h -1 ) at 400° C. for 3 hours, and naturally cooled to room temperature to take out the catalyst, which was uniformly dark black.

Embodiment 3

[0023] Take Ni(NO 3 ) 2 .6H 2 O 10g of tetraethyl orthosilicate 30ml, dissolved in 75ml of ethanol, add 15ml of acetic acid, 4ml of water, stir evenly, heat at 80°C to form a gel, dry in an oven at 100-120°C, and stir intermittently, place in a muffle furnace Roast at 400°C for 3 hours, then cool down to room temperature naturally, under hydrogen flow (hydrogen volume space velocity 300-500h -1 ) at 400° C. for 3 hours, and naturally cooled to room temperature to take out the catalyst, which was uniformly dark black.

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PUM

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Abstract

The catalyst has active component Ni and carrier SiO2 and Al2O3 in the molar ratio of 1 to 1.47-5.98 to 0-3.3. The catalyst is prepared with Ni(NO3)2, ethyl metasilicate with or without aluminum nitrate and ethanol, and through pH regulation to 3-5 or 7-9 with acetic acid, ammonia water or urea, heating at 80-120 deg.c to form gel, roasting at 400-550 deg.c and reduction at 400-580 deg.c. One technological process of catalytically hydrogenating cis-butenedioic anhydride to prepare butasnedioic anhydride in the state with or without solvent is provided. The catalyst has the features of highspecific surface area, high dispersion of metal in carrier, high heat stability, high catalytic activity, high selectivity, capacity of being reused, easy separation from the product, low cost, low consumption and mild reaction condition.

Description

Technical field: [0001] The invention belongs to a nickel-based supported catalyst for preparing succinic anhydride by catalytic hydrogenation of maleic anhydride and its preparation and application. Background technique: [0002] Succinic anhydride, also known as succinic anhydride, has extensive and important uses in medicine, pesticides, petrochemicals, dyes, and alkyd resins. With the development of my country's pharmaceutical, pesticide, petrochemical and other industries, the demand for succinic anhydride is bound to increase. According to the report of China Chemical Industry Information Center, there is a certain gap in domestic succinic anhydride, especially for refined products with a content of more than 99%. Succinic anhydride is almost entirely imported. [0003] At present, succinic anhydride is mainly prepared by succinic acid dehydration method or maleic anhydride catalytic hydrogenation. The disadvantage of succinic acid dehydration method is that the proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C07C51/56C07C55/10
Inventor 赵永祥秦晓琴高春光王永钊刘滇生
Owner SHANXI UNIV
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