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Catalyst and method of reaction for preparing butanedioic anhydride from maleic anhydride through liquid phase hydrogenation

A technology for preparing succinic anhydride and catalyst, which is applied in chemical instruments and methods, molecular sieve catalysts, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problem of large loss rate of Pd, conversion rate of maleic anhydride and succinic anhydride selection. low Pd loss rate, excellent reactivity, and good reproducibility

Inactive Publication Date: 2016-05-25
SHANGHAI HUAYI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the technical problems to be solved by the present invention is that in the prior art, the Pd loss rate is large, the conversion rate of maleic anhydride and the selectivity of succinic anhydride are relatively low. Catalyst for acid anhydride reaction

Method used

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  • Catalyst and method of reaction for preparing butanedioic anhydride from maleic anhydride through liquid phase hydrogenation
  • Catalyst and method of reaction for preparing butanedioic anhydride from maleic anhydride through liquid phase hydrogenation
  • Catalyst and method of reaction for preparing butanedioic anhydride from maleic anhydride through liquid phase hydrogenation

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Experimental program
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Embodiment 1

[0031] Weigh 500gSiO2 2 For the carrier, add 100g of silica sol and 300ml of aqueous solution to it and knead evenly in a kneader, place it in an extruder for extrusion molding, screen a circular template for extrusion, and cut into pellets with a pelletizer to obtain a long carrier. The formed carrier was dried at 110° C. for 24 hours, and then calcined at 600° C. for 8 hours to obtain a strip-shaped catalyst carrier.

[0032] A Pd-containing precursor impregnation solution was prepared, and the concentration of the impregnation solution was 0.01mol / L. Under normal pressure or vacuum, take 200 g of the formed strip-shaped carrier and immerse it in the impregnation solution. The impregnation temperature is 50°C, impregnated and stirred for 2 hours, dried at 110°C for 8 hours, and then calcined at 450°C for 4 hours. That is, a strip-shaped catalyst is obtained. The size of the bar-shaped catalyst is 2.0mm in particle size, 2-5mm in length, and 190m in specific surface area ...

Embodiment 2

[0041] Weigh 1000gSiO 2 Carrier, add 200g silica sol and 600ml aqueous solution to it, knead evenly in the kneader, put it in extruder to extrude, and screen the template to extrude and pelletize to obtain elongated carrier, and elongated particles are passed through The spherical granulator granulates into spherical granules. The formed carrier was dried at 110° C. for 24 hours, and then calcined at 600° C. for 8 hours to obtain a spherical catalyst carrier.

[0042] A Pd-containing precursor impregnation solution was prepared, and the concentration of the impregnation solution was 0.01mol / L. Under normal pressure or vacuum, take 200 g of the shaped spherical carrier and immerse it in the impregnation solution. The impregnation temperature is 50°C, impregnated and stirred for 2 hours, dried at 110°C for 8 hours, and then calcined at 450°C for 4 hours to obtain a spherical catalyst. The size of the spherical catalyst is 2.5mm in particle size and 200m in specific surface ar...

Embodiment 3

[0045] Weigh 800gSiO2 2 For the carrier, add 160g of silica sol and 480ml of aqueous solution, knead evenly in a kneader, put it in an extruder to extrude, screen a clover-shaped template, extrude, and cut into pellets to obtain a clover-shaped carrier. The formed carrier was dried at 110° C. for 24 hours, and then calcined at 600° C. for 8 hours to obtain a clover-shaped catalyst carrier.

[0046] A Pd-containing precursor impregnation solution was prepared, and the concentration of the impregnation solution was 0.01mol / L. Under normal pressure or vacuum, take 300 g of the formed clover carrier and immerse it in the immersion solution. The impregnation temperature is 50°C, impregnated and stirred for 2 hours, dried at 120°C for 8 hours, and then calcined at 550°C for 4 hours to obtain the clover-shaped catalyst. The size of the catalyst is 3.0mm in particle size and 220m in specific surface area 2 / g, pore volume 0.8ml / g, pore diameter 18nm. The lateral pressure strength ...

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Abstract

The invention relates to a catalyst and method of the reaction for preparing butanedioic anhydride from maleic anhydride through liquid phase hydrogenation. The problems that in the prior art, the Pd loss rate is high and the maleic anhydride conversion rate and butanedioic anhydride selectivity are low are mainly solved. The catalyst is prepared through a dipping method, carriers or carriers with active auxiliaries are formed into strip-shaped, spherical or special-shaped particles through forming auxiliaries, Pd is the active ingredient, the problems are well solved through the technical scheme of the method for spraying a solution with Pd metal compounds on the forming particle carriers through the dipping method, and the catalyst and the method can be used for the reaction for preparing butanedioic anhydride from maleic anhydride through liquid phase hydrogenation.

Description

technical field [0001] The invention relates to a catalyst and a method for the reaction of maleic anhydride liquid-phase hydrogenation to succinic anhydride. Background technique [0002] Maleic anhydride is a commonly used important organic chemical raw material. In recent years, domestic maleic anhydride enterprises have the advantage of low raw material cost. There are many new and expanded plants, and the production capacity of maleic anhydride plants is increasing rapidly. Statistics show that in 2005, the production capacity of maleic anhydride in my country was only 278,000 tons, but by 2013, there were more than 30 enterprises producing maleic anhydride in my country, with a production capacity of about 1.53 million tons. It is expected that by 2015, the national maleic anhydride production capacity will exceed 180 tons. The production capacity of maleic anhydride has grown too fast and the supply exceeds demand. In contrast, the development speed of downstream pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J29/22B01J29/74C07D307/60
CPCB01J23/44B01J29/22B01J29/7476B01J2229/186C07D307/60
Inventor 吴文娟卢磊廖湘洲李永刚宁春利揭元萍张春雷
Owner SHANGHAI HUAYI GRP CO
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