Method for the preparation of coupling gamma-butyrolactone and silvan

A technology of methyl furan and butyrolactone, which is applied in sustainable manufacturing/processing, chemical industry, climate sustainability, etc., can solve the problem of uneven temperature distribution in the catalyst bed, increased production costs, and insufficient use of high liquid air. It can save hydrogen production equipment and reduce energy.

Inactive Publication Date: 2003-03-26
SYNEFUELS CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The dehydrogenation of 1,4-butanediol to GBL is a moderate-intensity endothermic reaction, and the general reaction conditions are at normal pressure, 200-270°C, and 0.1-3hr by Air Liquide -1 In a wide range of reactions, due to the endothermic reaction, the actual production process is affected by heat transfer, and its high liquid space is not fully utilized, and due to the uneven temperature distribution of the catalyst bed, there are still a small amount of butanol, butyric acid, etc. product formation
The generated hydrogen is vented or hydrogen is recovered through a series of unit operations, which increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Catalyst preparation process: take copper nitrate 53.2g, chromium nitrate 172.3g, its composition is CuO35%, Cr 2 o 3 65%. Dissolve them in 700ml of deionized water to prepare a solvent. Stir the solution and ammonium bicarbonate precipitant at about 50°C, mix to obtain a precipitate, then age for 1.5 hr, wash and filter the precipitate, dry at 110°C for 12 hr, and roast at 350°C for 5 hr. Finally, 1% graphite powder was added to form a tablet to obtain the desired catalyst sample.

[0052] (2) Reaction performance:

[0053] Catalyst activity evaluation and stability test are carried out on fixed bed evaluation device (commonly known as small test device). The reactor is made of a stainless steel tube with an inner diameter of 12 mm and a length of 600 mm. There is a 4 mm thermocouple sleeve in the center and a metal sleeve outside, and an electric furnace wire is wound on it. The reaction temperature is measured by a 1 mm armored thermocouple inserted into ...

Embodiment 2

[0057] (1) Catalyst preparation process:

[0058] Weigh copper nitrate 68.4g, chromium nitrate 145.8g, its composition is CuO 45%, Cr 2 o 3 55% others are with embodiment 1.

[0059] (2) Reaction performance:

[0060] Under the conditions of 240°C, 0.05MPa, hydrogen-to-oil ratio of 60, and butanediol / furfural molar ratio of 1.8, the conversion rate of 1,4-butanediol was 89.5%, the conversion rate of furfural was 94.6%, and the total selectivity was 78.3%.

Embodiment 3

[0062] (1) Catalyst preparation process:

[0063] Weigh copper nitrate 83.6g, chromium nitrate 119.3g, its composition is CuO 55%, Cr 2 o 3 45% others are with embodiment 1.

[0064] (2) Reaction performance:

[0065] Under the conditions of 210°C, 0.08MPa, hydrogen-to-oil ratio of 50, butanediol / furfural molar ratio of 1.5, the conversion rate of 1,4-butanediol was 88.6%, the conversion rate of furfural was 93.3%, and the total selectivity was 80.5%.

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PUM

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Abstract

The invention relates to a coupling method for preparing gamma-bulyrolactone and 2-methylfuran. It is characterized by making the mixture of the furfural and 1,4-butanediol implement close-coupled reaction on the hydrogenation catalyst under the conditions of gas phase, hydrogenation or no hydrogenation and proper temperature. Said invention possesses hydrogenation and dehydrogenation integration process, so that it can save hydrogen-making equipment, has no need of hydrogenation or recovering hydrogen, and its coupling process is a high-effective one.

Description

[0001] Field: [0002] The invention belongs to a method for preparing gamma-butyrolactone and 2-methylfuran, in particular to a method for preparing gamma-butyrolactone (abbreviated as GBL) and 2-methylfuran with 1,4-butanediol and furfural as raw materials. methyl furan. Background technique: [0003] γ-butyrolactone is an important organic chemical product, widely used in petrochemical, pharmaceutical, dyestuff, pesticide and fine chemical industry, especially in the synthesis of pyrrolidone, N-methylpyrrolidone, vinylpyrrolidone, α-acetyl It is widely used in important products such as butyrolactone. In addition, γ-butyrolactone is also a high-boiling solvent with strong solvency, good conductivity and stability, and is safe and convenient to use and manage. [0004] At present, there are two main raw material routes to produce γ-butyrolactone in the world, namely 1,4-butanediol dehydrogenation method and maleic anhydride hydrogenation method. Among them, the 1,4-butane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/06C07D307/33
CPCY02P20/10Y02P20/129
Inventor 朱玉雷李永旺吴贵升相宏伟苏化连
Owner SYNEFUELS CHINA
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