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Catalyst for synthesizing succinic acid through water-phase catalytic hydrogenation, and application of catalyst

A catalytic hydrogenation and catalyst technology, applied in the direction of organic compound/hydride/coordination complex catalyst, metal/metal oxide/metal hydroxide catalyst, heterogeneous catalyst chemical elements, etc., can solve the problem of succinic acid It is difficult to fall back and increase the cost price

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

AI Technical Summary

Problems solved by technology

Therefore, although the water-phase catalytic hydrogenation process helps to save production costs, in view of the above-mentioned increase in raw material costs, it is still difficult to reduce the cost price of succinic acid

Method used

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  • Catalyst for synthesizing succinic acid through water-phase catalytic hydrogenation, and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The catalyst described in this embodiment is prepared by impregnation method with silicon carbide as the carrier and ruthenium as the active component, which specifically includes the following steps:

[0039] (1) With ruthenium as active component, with zirconia as auxiliary agent, prepare impregnation solution with the precursor of ruthenium (ruthenium chloride) and the precursor of zirconia (zirconium nitrate), control the mass concentration of ruthenium chloride to be 2wt %, the mass concentration of controlling zirconium nitrate is 8.1wt%;

[0040](2) Using 10wt% nitric acid to pretreat the silicon carbide carrier at 40° C. for 12 hours to obtain a pretreated carrier;

[0041] (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

[0044] 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:

[0045] (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%;

[0046] (2) Using 30wt% sulfuric acid to pretreat the activated carbon carrier at 90°C for 0.5h to obtain a pretreated carrier;

[0047] (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 450°C, the active component copper content is 20wt%, and the additive sodium nitrite Catalyst at 4.5% by weight.

[0048] Such as figu...

Embodiment 3

[0050] 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:

[0051] (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%;

[0052] (2) Pretreating the α-alumina carrier at 20° C. for 5 hours with 5 wt % hydrofluoric acid to obtain a pretreated carrier;

[0053] (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%.

[0054] Such as figure 1 As shown in the flow chart, the method for synthesizing succinic acid by aqueous catalytic hydrogenation described in this example uses 5 wt% maleic ...

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Abstract

The invention belongs to the technical field of catalyst processing, particularly relates to a catalyst for synthesizing succinic acid through water-phase catalytic hydrogenation, and further discloses a preparation method of the catalyst and application of the catalyst for synthesizing succinic acid through catalytic hydrogenation. The invention discloses a catalyst for synthesizing succinic acidthrough water-phase catalytic hydrogenation, and further discloses a method for synthesizing succinic acid through water-phase hydrogenation by directly catalyzing a maleic acid aqueous solution through the catalyst, wherein an intermediate product maleic acid aqueous solution generated in the existing maleic anhydride synthesis process is directly used as a raw material to directly perform aqueous phase catalytic hydrogenation to synthesize succinic acid, so that the step of post-treatment from maleic acid to a maleic anhydride product is omitted, continuous large-scale production can be realized, the production process of succinic acid is greatly simplified, and the production cost is effectively saved. The catalyst is also completely suitable for a process of preparing succinic acid bytaking an aqueous solution obtained by dissolving maleic anhydride as a raw material.

Description

technical field [0001] The invention belongs to the technical field of catalyst processing, specifically relates to a catalyst for synthesizing succinic acid by catalytic hydrogenation in water phase, and further discloses its preparation method and its application for synthesizing succinic acid by catalytic hydrogenation. 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 abro...

Claims

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Application Information

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IPC IPC(8): B01J27/224B01J23/78B01J23/44B01J23/63B01J23/755B01J31/34C07C51/36C07C55/10
CPCB01J27/224B01J23/78B01J23/44B01J23/63B01J23/755B01J23/002B01J31/34C07C51/36B01J2523/00B01J2231/645B01J2523/3712B01J2523/41B01J2523/828B01J2523/31B01J2523/47B01J2523/847C07C55/10
Inventor 王宏涛
Owner 王宏涛
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