Catalyst for continuous production of succinic anhydride from hydrogenation of maleic anhydride and preparation method thereof

The technology of succinic anhydride and catalyst is applied in the field of supported nickel catalyst and its preparation, which can solve the problems of high catalyst cost and high reaction pressure, and achieve the effects of simple preparation method, high dispersion and high hydrogenation selectivity.

Active Publication Date: 2009-08-12
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this process provides a continuous production method for succinic anhydride, its reaction pressure is relatively high, which requires sp...

Method used

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  • Catalyst for continuous production of succinic anhydride from hydrogenation of maleic anhydride and preparation method thereof
  • Catalyst for continuous production of succinic anhydride from hydrogenation of maleic anhydride and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take a certain amount of SiO 2 The carrier was calcined in a muffle furnace at 400°C for 6 hours in an air atmosphere, cooled to room temperature and used for later use; 127.19g of nickel nitrate hexahydrate, 10.19g of copper nitrate trihydrate and 82ml of 25wt%-28wt% ammonia were prepared to prepare 200ml of mixed nickel Salt solution; take 200ml of the above-mentioned prepared nickel salt solution and impregnate it into the above-mentioned 100g of the treated carrier, and let it stand at room temperature for 0.5h; Roast at 400°C for 8 hours in air atmosphere; hydrogen space velocity at normal pressure is 300 hours -1 , reduced at 350°C for 4h, and then deactivated with oxygen to obtain catalyst A after cooling down to room temperature.

Embodiment 2

[0031] Take a certain amount of Al 2 o 3 The carrier was calcined in a muffle furnace at 800° C. for 3 hours in an air atmosphere, cooled to room temperature and then used for later use; the rest was the same as in Example 1 to obtain catalyst B.

Embodiment 3

[0033] Take a certain amount of SiO 2 4 wt% SiO 2 -Al 2 o 3 The composite oxide carrier was calcined in a muffle furnace at 600° C. for 5 hours in an air atmosphere, cooled to room temperature and then used for later use; the rest was the same as in Example 1 to obtain catalyst C.

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Abstract

The invention provides a catalyst for continuously producing butanedioic anhydride by maleic anhydride hydrogenation. The catalyst is a nickel loaded catalyst prepared by an equivalent-volume impregnation method, wherein in the catalyst, the content of nickel is 13 to 20 weight percent, the content of accelerating agent is 1 to 7 weight percent, and a carrier is a composite oxide of SiO2 and Al2O3 or SiO2-Al2O3. A preparation method for the catalyst comprises the following steps: impregnating impregnation solution blended by ammonia water and active metal salt solution on a carrier subjected to baking pretreatment at a temperature between 400 and 800 DEG C by the equivalent-volume impregnation method to form the catalyst through drying, baking and reducing treatment. The catalyst is applied to continuously preparing the butanedioic anhydride by maleic anhydride hydrogenation on a fixed bed reactor, the conversion rate of maleic anhydride is more than or equal to 99.98 percent, and the selectivity of the butanedioic anhydride is more than or equal to 98.85 percent. The catalyst achieves the technical-scale continuous production of the butanedioic anhydride, and has the advantages of high activity, good selectivity, high yield (more than or equal to 98.83 percent) and long service life.

Description

technical field [0001] The invention relates to a nickel-loaded catalyst, in particular to a nickel-loaded catalyst used for hydrogenation of maleic anhydride on a fixed-bed reactor to continuously produce succinic anhydride and a preparation method thereof. Background technique [0002] Succinic anhydride (Succinic acid), also known as succinic anhydride, the molecular formula is C 4 h 4 o 3 , is an important organic synthetic raw material, widely used in medicine, food flavoring, pesticide, fine chemical industry, alkyd resin and other fields. In recent years, succinic anhydride has Applications such as glycol esters (PBS) and organic coatings have greatly increased the demand. [0003] The current production methods of succinic anhydride can be divided into three methods: succinic acid dehydration method; biological fermentation method and maleic anhydride hydrogenation method. The dehydration method of succinic acid is divided into direct dehydration method and chemi...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/72B01J23/83C07D307/60
Inventor 赵永祥张因张鸿喜潘丽杨燕萍
Owner SHANXI UNIV
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