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New process for preparing 2-acetylfuran from furan

A technology of acetylfuran and acetylfuran crude product, applied in directions such as organic chemistry, can solve problems such as yield and purity decline, multiple side reactions, influence product generation, etc., and achieve the effects of improving utilization rate, improving conversion rate, and improving catalytic effect

Inactive Publication Date: 2021-06-18
安徽金轩科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many ways to prepare acetylfuran, but the yield and purity of the products obtained by different production processes are different, especially in the selection of catalysts, which will bring more side reactions, which will affect the formation of products. Both yield and purity will decrease

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  • New process for preparing 2-acetylfuran from furan

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] A new process for preparing 2-acetylfutyofuran using furan, including the following steps:

[0033] Step S1: furanization

[0034] Acetic acid, furan, acetic anhydride and water were added to the esterification reaction kettle, and the solid catalyst was added and uniform, and the esterification reaction was carried out at 30 ° C, pressure + 0.05 MPa, and the esterified reaction liquid, wherein acetic acid, furan is obtained. , The proportion of adding mass of acetic anhydride and solid catalyst is 1: 1: 5: 0.1;

[0035] Step S2: Esterified reaction liquid circulation

[0036] The esterification reaction liquid in which the esterified reaction kettone bottom is packed into the circulating condenser, and then introduced into the esterification reaction kettle after cooling temperature drop to -10 ° C, circulating reaction;

[0037] Step S3: Refining of the esterified reaction liquid

[0038] After the esterification reaction, the esterified reaction liquid was subjected to p...

Embodiment 2

[0043] A new process for preparing 2-acetylfutyofuran using furan, including the following steps:

[0044] Step S1: furanization

[0045] Acetic acid, furan, acetic anhydride and water were added to the esterification reaction kettle, and the solid catalyst was added and uniformly added, and the esterification reaction was carried out at 45 ° C, pressure + 0.05 MPa, and the esterified reaction liquid, wherein the acetic acid, furan is obtained. The ratio of the addition quality ratio of acetic anhydride and solid catalyst is 3: 1.5: 8: 0.5;

[0046] Step S2: Esterified reaction liquid circulation

[0047] The esterification reaction liquid in which the esterified reaction kettone bottom is pumped into the circulating condenser, and then introduced into the esterification reaction kettle, circulating reaction;

[0048] Step S3: Refining of the esterified reaction liquid

[0049] After the esterification reaction, the esterification reaction liquid was subjected to pressure-reduced ...

Embodiment 3

[0054] A new process for preparing 2-acetylfutyofuran using furan, including the following steps:

[0055] Step S1: furanization

[0056]Acetic acid, furan, acetic anhydride and water were added to the esterified reaction kettle, and the solid catalyst was added and uniform, and the esterification reaction was carried out at 60 ° C, pressure + 0.05 MPa, and the esterified reaction liquid was obtained, wherein the acetic acid, furan is obtained. , The proportion of the addition mass of acetic anhydride and solid catalyst is 5: 2: 10: 1;

[0057] Step S2: Esterified reaction liquid circulation

[0058] The esterification reaction liquid in which the esterified reactor bottom is obtained by obtaining step S1, and then introduces the esterification reaction kettle, circulating reaction in the chemical renovation of 30 ° C.

[0059] Step S3: Refining of the esterified reaction liquid

[0060] After the esterification reaction, the esterified reaction solution was subjected to pressure-...

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Abstract

The invention discloses a novel process for preparing 2-acetylfuran from furan. The process comprises the following steps: adding acetic acid, furan, acetic anhydride and water into an esterification reaction kettle, uniformly mixing, adding a solid catalyst, and carrying out an esterification reaction to obtain an esterification reaction liquid; pumping the esterification reaction liquid at the bottom of the esterification reaction kettle into a circulating condenser, condensing and cooling, and then introducing into the esterification reaction kettle; carrying out reduced pressure distillation on the esterification reaction liquid to separate out acetic acid, and refining the residual esterification reaction liquid multiple times to obtain a crude product; and carrying out reduced pressure distillation on the crude product to obtain a 2-acetylfuran finished product for the next working section, transferring the kettle bottom solution of the reduced pressure distillation kettle into a flushing distillation kettle, and further carrying out reduced pressure distillation to finally obtain the 2-acetylfuran finished product. According to the method, furan is used as a raw material, 2-acetylfuran is obtained through esterification, reaction liquid circulation and multiple times of refining, the raw material in the process can be recycled, so that resource waste is reduced, and the utilization rate of the raw material is further increased.

Description

Technical field [0001] The present invention relates to the preparation of organic synthesis intermediates and fine chemical intermediates, and in particular, therefore, a new process for preparing 2-acetylfuran by furan. Background technique [0002] 2-Acetylfuran is an important organic synthetic intermediate and food additive, 2-acetylofuran can synthesize a variety of pharmaceuticals and chemical products including furanides, or in the food industry, such as additives for coffee , Meat-flavored flavor, soup, meat, seasoning and baking food. [0003] At present, a variety of acetylfuran has a variety of methods, but the yield and purity of the product obtained by different production processes have differentiated, especially the choice of catalysts, which will bring more side reactions, which in turn affect the production of the product. The yield and purity will fall. Therefore, there is an important practical significance of providing a new process of 2-acetylfuran. Inventi...

Claims

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Application Information

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IPC IPC(8): C07D307/46
CPCC07D307/46
Inventor 孙多龙程光锦胡坤伏忠祥
Owner 安徽金轩科技有限公司
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