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Hydrogenation catalyst, preparation method and application thereof, and method for preparing succinic acid through maleic anhydride hydrogenation

A hydrogenation catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problems of complex process flow and high catalyst cost, and achieve simple process , Simplify the production operation process and save energy

Active Publication Date: 2022-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a hydrogenation catalyst and its The preparation method and application and the method for producing succinic acid by hydrogenation of maleic anhydride, the catalyst has excellent catalytic activity, stability and selectivity of succinic acid, and the catalyst cost is low, the process is simple, and can be used for the continuous hydrogenation of maleic anhydride to produce succinic acid. in succinic acid

Method used

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preparation example Construction

[0028] As previously mentioned, the second aspect of the present invention provides a method for preparing a hydrogenation catalyst, the method comprising:

[0029] (1) Mix the precursors of Ni and Ce with the carrier, perform the first aging, and then perform the first roasting to obtain the composite oxide;

[0030] (2) mixing the composite oxide with a Ru precursor, performing a second aging, and then performing a second calcination;

[0031] Wherein, the carrier contains SiO 2 ;

[0032] The amount of the precursor of Ni, the precursor of Ce and the precursor of Ru is such that in the prepared catalyst, relative to the carrier, the Ni content is 1-15% by weight, and the Ce oxide content is 0.5-7% by weight %, the Ru content is 0.1-2% by weight.

[0033]The inventors of the present invention have found that in the preparation method of the present invention, when the raw materials used are the same, the aforementioned specific step-by-step loading method can be used to d...

Embodiment approach

[0053] According to a preferred embodiment of the present invention, the preparation method of the hydrogenation catalyst comprises:

[0054] (1) Mix the precursors of Ni and Ce with the carrier, perform the first aging, and then perform the first roasting to obtain the composite oxide;

[0055] (2) mixing the composite oxide with a Ru precursor, performing a second aging, and then performing a second calcination;

[0056] Wherein, the carrier contains SiO 2 ;

[0057] The amount of the precursor of Ni, the precursor of Ce and the precursor of Ru is such that in the prepared catalyst, relative to the carrier, the Ni content is 1-15% by weight, and the Ce oxide content is 0.5-7% by weight %, the Ru content is 0.1-2% by weight;

[0058] The first aging is carried out under standing; the conditions of the first aging also include: the time is 1-6h, the temperature is 30-60°C, more preferably 30-50°C;

[0059] The second aging is carried out at a pH value of 5-10; the second a...

preparation example 1

[0084] This preparation example is used to illustrate the hydrogenation catalyst of the present invention and its preparation method.

[0085] (1) Weigh 10.90g of Ni(NO 3 ) 3 ·6H 2 O and 5.04g of Ce(NO 3 ) 3 ·6H 2 O, dissolved in water and fixed to 50.0ml to obtain nickel nitrate-cerium nitrate mixed solution; then 50g of carrier SiO 2 (The specific surface area is 300m 2 / g, water absorption rate 1.0mL / g) was immersed in the nickel nitrate-cerium nitrate mixed solution, stirred evenly, and aged at 40°C (i.e. the first aging) for 4h, then dried at 120°C for 12h, and finally Calcined at 450°C in air for 4h to obtain composite oxide carrier E;

[0086] (2) adding the composite oxide carrier E to 100ml of ruthenium trichloride aqueous solution with an elemental Ru content of 0.02g / L is exothermic, and under stirring conditions, adding dropwise a concentration of 25wt% ammonia to adjust the solution The pH value was maintained at 9, and then reacted at 55°C (that is, the s...

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Abstract

The invention relates to the technical field of catalysts, in particular to a hydrogenation catalyst, a preparation method and application thereof and a method for preparing succinic acid through maleic anhydride hydrogenation, the catalyst comprises a carrier and active components loaded on the carrier, the active components contain oxides of Ce, Ni and Ru, and the carrier contains SiO2; ru is distributed on the outer layer of the catalyst, and oxides of Ni and Ce are distributed in the catalyst; in the catalyst, relative to the carrier, the content of Ni is 1-15 wt%, the content of Ce oxide is 0.5-7 wt%, and the content of Ru is 0.1-2 wt%. The hydrogenation catalyst has excellent catalytic activity, stability and succinic acid selectivity, and is low in cost and simple in process. The catalyst provided by the invention can be used for preparation of succinic acid by continuous hydrogenation of maleic anhydride at a low catalytic reaction temperature (70-180 DEG C).

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a hydrogenation catalyst, a preparation method and application thereof, and a method for preparing succinic acid by hydrogenating maleic anhydride. Background technique [0002] Succinic acid, commonly known as succinic acid, is a common natural organic acid that widely exists in the human body, animals, plants and microorganisms. Succinic acid is an important organic chemical raw material and intermediate, widely used in medicine, agriculture, food, dyes and other fields. Moreover, succinic acid is also the main raw material of polybutylene succinate biodegradable materials. In recent years, with the country's emphasis on and development of environmental protection policies, the application fields of succinic acid have continued to expand, and the demand for it in domestic and foreign markets has also increased day by day. [0003] Industrially, the production methods of suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/08B01J37/03C07C51/083C07C55/10
CPCB01J23/894B01J23/002B01J37/082B01J37/031C07C51/083B01J2523/00B01J35/397C07C55/10B01J2523/3712B01J2523/41B01J2523/821B01J2523/847
Inventor 赵开径冯海强高继东朱跃辉
Owner CHINA PETROLEUM & CHEM CORP
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