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Method for synthesizing succinic acid through low-cost continuous water-phase catalytic hydrogenation

A technology for catalytic hydrogenation and succinic acid, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, catalytic reactions, etc., can solve the problem of high cost of succinic acid synthesis process, achieve cheap raw materials, avoid side reactions, No effect of three wastes pollution

Inactive Publication Date: 2021-03-12
王宏涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For this reason, the technical problem to be solved by the present invention is to provide a method for the synthesis of succinic acid by continuous aqueous catalytic hydrogenation with low cost, so as to solve the problem that the cost of succinic acid synthesis process is higher in the prior art

Method used

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  • Method for synthesizing succinic acid through low-cost continuous water-phase catalytic hydrogenation

Examples

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Effect test

Embodiment 1

[0033] The catalyst described in this embodiment is prepared by using silicon carbide as a carrier and ruthenium as an active component by impregnation method, which specifically includes the following steps:

[0034] (1) With ruthenium as the active component, with zirconia as auxiliary agent, prepare impregnation solution with the precursor of ruthenium (ruthenium trichloride) and the precursor of zirconia (zirconium nitrate), control the mass concentration of ruthenium chloride as 2wt%, the mass concentration of the control zirconium salt is 8.1wt%;

[0035] (2) Using 10wt% nitric acid to pretreat the silicon carbide carrier at 40° C. for 12 hours to obtain a pretreated carrier;

[0036] (3) Immerse the obtained carrier in the impregnating solution prepared in step (1) by impregnation method to carry out normal temperature loading, after conventional drying and roasting at 400°C, the active component ruthenium content is 3wt%, and the auxiliary agent zirconia content is 7wt...

Embodiment 2

[0039] The catalyst described in this example is prepared by using activated carbon as a carrier and copper as an active component by an impregnation method, which specifically includes the following steps:

[0040] (1) take copper as active component, take sodium nitrite as auxiliary agent, prepare dipping solution with copper precursor (copper nitrate) and sodium nitrite, control the mass concentration of copper nitrate to be 11.8wt%, control sodium nitrite The mass concentration is 0.9wt%;

[0041] (2) Using 30wt% sulfuric acid to pretreat the activated carbon carrier at 90°C for 0.5h to obtain a pretreated carrier;

[0042] (3) Use the impregnation method to impregnate the obtained carrier in the impregnation solution prepared in step (1) to carry out normal temperature loading, and through conventional drying and roasting in nitrogen at 400°C, the active component copper content is 20wt%, and the additive sodium nitrite Catalyst at 4.5% by weight.

[0043] As the flow c...

Embodiment 3

[0045] The catalyst described in this example is prepared with α-alumina as the carrier and palladium as the active component by impregnation method, which specifically includes the following steps:

[0046] (1) Taking palladium as an active component, preparing an impregnating solution with a palladium precursor (palladium chloride), controlling the mass concentration of palladium chloride to be 0.5wt%;

[0047] (2) Pretreating the α-alumina carrier at 20° C. for 5 hours with 5 wt % hydrofluoric acid to obtain a pretreated carrier;

[0048] (3) Immerse the obtained carrier in the impregnation solution prepared in step (1) by impregnation method to carry out normal temperature loading, conventional drying and roasting at 400° C. to obtain a catalyst with an active component palladium content of 0.1 wt%.

[0049] As the flow chart shown in the accompanying drawing, the method for synthesizing succinic acid by aqueous catalytic hydrogenation described in this example uses 5 wt% ...

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Abstract

The invention belongs to the technical field of chemical synthesis, and particularly relates to a method for synthesizing succinic acid through low-cost continuous water-phase catalytic hydrogenation.According to the method for synthesizing succinic acid through low-cost continuous water-phase catalytic hydrogenation, a fixed bed catalytic mode is adopted, an intermediate product maleic acid aqueous solution generated in an existing maleic anhydride or maleic anhydride synthesis process is directly used as a raw material for directly carrying out water-phase catalytic hydrogenation to synthesize succinic acid, so that the step of post-treatment from maleic acid to a maleic anhydride product is omitted, and continuous large-scale production can be realized; and the method has the advantages of cheap raw materials, recyclable water in the preparation process, almost no three-waste pollution in the whole preparation process, great simplification of the succinic acid production process, and effective saving of the production cost.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a low-cost continuous water-phase catalytic hydrogenation method for synthesizing succinic acid. Background technique [0002] Succinic acid, also known as succinic acid, is an important fine chemical product and organic synthesis intermediate, and is widely used in synthetic plastics, rubber, medicine, food, paint and other industries. In recent years, due to the application of succinic acid in the synthesis of biodegradable plastic polybutylene succinate (PBS), its demand has increased rapidly. PBS is a biodegradable plastic with excellent performance. Compared with traditional biodegradable plastics, it has the advantages of high melting point, good heat resistance, and excellent mechanical properties. It has broad market prospects at home and abroad. However, due to the current high price of succinic acid, the production cost of PBS is directly increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C51/36C07C55/10B01J27/224B01J23/78B01J23/44B01J23/63B01J23/755B01J31/34
CPCC07C51/36B01J27/224B01J23/78B01J23/44B01J23/63B01J23/755B01J23/002B01J31/34B01J2523/00B01J2231/645C07C55/10B01J2523/31B01J2523/47B01J2523/847B01J2523/3712B01J2523/41B01J2523/828
Inventor 王宏涛
Owner 王宏涛
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