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Catalyst for preparing gamma-butyrolactone through maleic anhydride liquid phase hydrogenation, preparation method and application of catalyst, and method for preparing gamma-butyrolactone

The technology of a catalyst and a maleic anhydride solution is applied in the field of liquid-phase hydrogenation of maleic anhydride to produce γ-butyrolactone, can solve the problems of requiring an alcohol aqueous solution, high catalyst cost, poor catalyst performance, etc., and achieves simple preparation process and low price. , the effect of reducing operating costs

Inactive Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, CN106955710A discloses a maleic anhydride liquid-phase hydrogenation catalyst; it consists of nickel / zirconia / alumina / silicon oxide, the catalyst preparation process is complex, and requires an aqueous alcohol solution, resulting in high catalyst cost
CN101940927A discloses a copper / zinc / titanium silicon maleic anhydride liquid-phase hydrogenation catalyst, which has poor performance, the conversion rate of maleic anhydride is 88.2-99.6%, and the selectivity of gamma-butyrolactone is 80.7-89.8%

Method used

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specific Embodiment approach

[0027] According to a preferred embodiment of the present invention, the preparation method comprises:

[0028] (1) Mix the precursors of copper oxide, zinc oxide and silicon oxide with water to obtain a first mixed solution; mix the aqueous solution of the precursor of tin oxide with the first mixed solution to obtain a second mixed solution;

[0029] (2) performing a contact reaction with the alkali solution and the second mixed solution to obtain a precipitate;

[0030] (3) The catalyst is obtained after the precipitate is filtered, washed, dried and calcined.

[0031] According to the present invention, preferably, step (1) includes: adding the aqueous solution of the precursor of tin oxide into the first mixed solution under stirring condition, and the mixing temperature is 40-90°C.

[0032] In the present invention, the aqueous solution of the precursor of tin oxide is preferably added later, so that the aqueous solution of the precursor of tin oxide can be fully disper...

Embodiment 1

[0049] This example is used to illustrate the catalyst for producing γ-butyrolactone by liquid-phase hydrogenation of maleic anhydride, its preparation method and application, and the method for producing γ-butyrolactone according to the present invention.

[0050] Weigh copper nitrate (Cu(NO 3 ) 2 ·3H 2 O) 249.04g, zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O) 314.39g, acidic silica sol (SiO 2 Mass content about 25%) 48.00g miscible in 2000mL deionized water, obtain the first mixed solution; Potassium stannate (K 2 Sn(OH) 6 )39.67g was dissolved in 150mL deionized water; firstly, the first mixed solution was put into the reaction kettle, and under constant stirring, the potassium stannate aqueous solution was added to the first mixed solution, and the temperature of the reaction solution was raised to 70°C at the same time , continue to add the ammonium bicarbonate solution that mass concentration is 10wt% after feeding, until the pH value reaches 7.2, after feeding again, insulate...

Embodiment 2

[0053] This example is used to illustrate the catalyst for producing γ-butyrolactone by liquid-phase hydrogenation of maleic anhydride, its preparation method and application, and the method for producing γ-butyrolactone according to the present invention.

[0054] The method for preparation according to embodiment 1 is used for the catalyst of maleic anhydride liquid-phase hydrogenation γ-butyrolactone, and the difference of embodiment 1 is (1) adjusting copper nitrate (Cu(NO 3 ) 2 ·3H 2 O), zinc nitrate (Zn(NO 3 ) 2 ·6H 2 O), the addition of acidic silica sol and potassium stannate makes the prepared catalyst contain CuO 36%, ZnO 46%, SnO 2 11%, SiO 2 7%, based on the total weight of the catalyst. (2) The potassium stannate aqueous solution was added to the first mixed solution, and the temperature of the reaction solution was raised to 80°C at the same time; other preparation methods, process parameters and material consumption were the same as in Example 1.

[0055...

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Abstract

The invention belongs to the technical field of catalysts, and discloses a catalyst for preparing gamma-butyrolactone through maleic anhydride liquid phase hydrogenation, a preparation method and application of the catalyst, and a method for preparing gamma-butyrolactone. The catalyst comprises the following components in percentage by weight: 20-70wt% of CuO, 25-75wt% of ZnO, 25-15wt% of SnO and2-8wt% of SiO2. The catalyst has high activity and selectivity, the conversion rate of maleic anhydride is greater than or equal to 95%, and the selectivity of gamma-butyrolactone is greater than or equal to 90%.

Description

technical field [0001] The present invention relates to the technical field of catalysts, more specifically, to a catalyst for preparing gamma-butyrolactone by liquid-phase hydrogenation of maleic anhydride and a preparation method thereof. The application of the catalyst, and a method for preparing gamma-butyrolactone by liquid-phase hydrogenation of maleic anhydride. Background technique [0002] γ-butyrolactone is an important fine organic chemical raw material, widely used in petrochemical, coating, pesticide, pharmaceutical and other fields. γ-butyrolactone can be used as a raw material for the production of γ-butyrolactam, N-methylpyrrolidone and N-vinylpyrrolidone. In addition, γ-butyrolactone is also a high-safety, low-toxic and environmentally friendly solvent that can dissolve most low-molecular polymers and some high-molecular polymers. [0003] At present, there are many methods for synthesizing γ-butyrolactone in industry, and the maleic anhydride hydrogenatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835B01J37/03C07D307/33
CPCB01J23/835B01J23/002B01J37/031C07D307/33B01J2523/00
Inventor 冯海强赵开径朱跃辉高继东
Owner CHINA PETROLEUM & CHEM CORP
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