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Catalysis method for synthesizing gamma butyrolactone

A synthesis method and technology of butyrolactone, which is applied in the field of catalytic synthesis of γ-butyrolactone, can solve the problems of high catalyst preparation cost, easy loss of active components, complicated process, etc., and achieve good catalytic effect, long service life and excellent process simple effect

Inactive Publication Date: 2007-02-28
FUDAN UNIV
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Problems solved by technology

[0007] The above method has the disadvantages of high catalyst preparation cost, complex process, easy loss of active components, etc.

Method used

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  • Catalysis method for synthesizing gamma butyrolactone

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Embodiment

[0020] 1. 6 grams of CuO-Cr prepared by sol-gel method 2 o 3 / SiO 2 The catalyst is loaded into a stainless steel reactor with a diameter of 20 mm. The content of copper oxide particles in the catalyst is 10.0%, the content of chromium oxide is 0.5%, and the content of silicon dioxide is 89.5%. Catalyst is prepared as follows:

[0021] (1) Copper oxide and chromium oxide are loaded on silica by sol-gel method. Take [Cu(NO 3 ) 2 ·3H 2 O] solid 1.82 grams, [Cr(NO 3 ) 3 9H 2 O] 0.16 g of solid was dissolved with an appropriate amount of distilled water, an appropriate amount of sodium hydroxide solution was added, and 17.9 g (30 wt%) of silica sol was added after the precipitation was complete. Stir for about 1 hour, age at 70-80 degrees for 4 hours, filter, and wash with distilled water;

[0022] (2) drying the above solid at 100-120° C., and roasting at 450-550° C. for 6 hours to obtain a catalyst for synthesizing γ-butyrolactone by gas-phase dehydrogenation and epoxi...

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Abstract

The present invention adopts CuO-Cr2O5 / SiO2 synthesized by sol-gel method as catalyst, and makes 1,4-butanediol undergo the process of gas-phase dehydrogenation treatment so as to obtain the invented gamma-butyrolactone. Said invention also provides the composition of said catalyst and its operation condition, the per pass convertion of 1,4-butanediol is up to 100% and the selectivity of gamma-butyrolactone can be up to 99%.

Description

technical field [0001] The present invention aims to provide a CuO-Cr synthesized by the existing sol-gel method 2 o 3 / SiO 2 The catalyst is used in the method for preparing γ-butyrolactone by gas-phase dehydrogenation of 1,4-butanediol. Background technique [0002] There have been many studies on the production of γ-butyrolactone by gas-phase dehydrogenation of 1,4-butanediol, and good results have been obtained. As early as 1946, John George Mackay Bremner et al. mentioned in GB583344 that γ-butyrolactone was prepared by dehydrogenation of 1,4-butanediol on Cu-ZnO prepared by co-precipitation method, and the yield of γ-butyrolactone was Only 30%. [0003] By 1967, in GB1066979, Smeykal Kart et al. mixed 1,4-butanediol in mechanically mixed Cu-ZnO / Al 2 o 3 The yield of gamma-butyrolactone is up to 94% in gas phase dehydrogenation. But the catalyst has a lifespan of only a few months and becomes less active as it is used more often. [0004] In order to further imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D307/33
Inventor 沈伟杨新艳徐华龙
Owner FUDAN UNIV