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Industrial preparation method of low-cost 2,5-furan dicarboxylic acid

A technology of furandicarboxylic acid and furan formic acid, which is applied in the direction of organic chemistry, can solve the problems of difficult industrial production and high cost, and achieve the effects of reducing reaction cost, simple process and low reaction temperature

Inactive Publication Date: 2018-09-21
芜湖万隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But, because the catalyst used in this method is high-cost cesium carbonate, it is difficult to be used in industrialized production

Method used

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  • Industrial preparation method of low-cost 2,5-furan dicarboxylic acid

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preparation example Construction

[0043] The invention provides a kind of preparation method of 2,5-furandicarboxylic acid, comprising the following steps:

[0044] 1) by furan formic acid salt, molten salt and catalyst, under the condition of carbon dioxide gas, after carrying out reaction, obtain 2,5-furandicarboxylic acid;

[0045] The melting point of the molten salt is less than or equal to 400°C;

[0046] The catalysts include metal salt catalysts and / or organic base catalysts.

[0047] The present invention is not particularly limited to the furan formate, and the furan formate well known to those skilled in the art can be used. Those skilled in the art can select and adjust according to actual production conditions, quality control and product requirements. The furanic acid salt preferably includes furanic acid potassium salt and / or furanic acid sodium salt, more preferably includes furanic acid potassium salt or furanic acid sodium salt.

[0048] The present invention is not particularly limited to ...

Embodiment 1

[0077] Into a 100 ml flask, 1.12 g (10 mmol) of furancarboxylic acid, 0.7 g (5 mmol) of potassium carbonate, and 10 ml of water were sequentially added. The obtained clear potassium furanic acid salt solution was evaporated to dryness under reduced pressure to obtain a white solid powder of potassium furanic acid salt. In a 100ml high-temperature and high-pressure reactor, add respectively the mixed molten salt 5.0g of the above-mentioned prepared potassium furoate, anhydrous potassium carbonate 3.45g (25mmol), potassium acetate and sodium acetate (the quality of potassium acetate and sodium acetate The ratio is 1:1). After the addition is complete, replace the air in the reactor with carbon dioxide. Then, under the condition of maintaining a certain air flow, the pressure of carbon dioxide was kept at 0.8 MPa, and the reaction was carried out at 280° C. for 24 hours, and the conversion rate was 95%.

[0078] After the reaction is over, add 100ml of deionized water to the re...

Embodiment 2

[0083] Into a 100 ml flask, 1.12 g (10 mmol) of furancarboxylic acid, 0.7 g (5 mmol) of potassium carbonate, and 10 ml of water were sequentially added. The obtained clear potassium furanic acid salt solution was evaporated to dryness under reduced pressure to obtain a white solid powder of potassium furanic acid salt. In a 100ml high temperature and high pressure reactor, add respectively the mixed molten salt 5.0g (mass ratio of potassium acetate and sodium acetate) of the above-mentioned prepared potassium salt of furanic acid, anhydrous potassium carbonate 3.45g (25mmol), potassium acetate and sodium acetate is 1:1). After the addition is complete, replace the air in the reactor with carbon dioxide. Then, under the condition of maintaining a certain gas flow, the pressure of carbon dioxide was kept at 0.8 MPa, and the reaction was carried out at 280° C. for 6 hours, and the conversion rate was 87%.

[0084] After the reaction is over, add 100ml of deionized water to the ...

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Abstract

The invention provides a preparation method of low-cost 2,5-furan dicarboxylic acid. The preparation method comprises the step of reacting furan formate, molten salt and a catalyst under the conditionof carbon dioxide gas to obtain the 2,5-furan dicarboxylic acid; a melting point of the molten salt is less than or equal to 400 DEG C; the catalyst comprises a metal salt catalyst and / or an organicalkali catalyst. The preparation method provided by the invention has the benefits that the 2,5-furan dicarboxylic acid is prepared by taking the furan formate as an initial raw material and the cheapand easy-to-obtain conventional metal salt as the catalyst and by specially utilizing a monomer or a mixture of organic salt or inorganic salt; both the used catalyst and the used molten salt are cheap chemical products, so that the reaction cost is greatly reduced; the preparation method is simple in process, low in reaction temperature, economic, environmentally-friendly and suitable for large-scale industrial production and pushes the industrialization progress of the 2,5-furan dicarboxylic acid.

Description

technical field [0001] The invention belongs to the technical field of 2,5-furandicarboxylic acid synthesis, and relates to a preparation method of 2,5-furandicarboxylic acid, in particular to a low-cost industrial preparation method of 2,5-furandicarboxylic acid. Background technique [0002] 2,5-furandicarboxylic acid (FDCA), the chemical formula is C 6 h 4 o 5 , the structural formula is As an important derivative of furan, its bio-based polymer aromatic ring monomer with a "rigid" planar structure can be polymerized with monomers such as diols and diamines to prepare new bio-based polymer synthetic materials with excellent performance. It is an important chemical raw material and organic chemical intermediate. [0003] At present, with the wide application of polyester products, the rapid development of the polyester raw material industry has been driven. Among them, the development of bio-based polyester monomers used to replace petroleum-based raw materials has b...

Claims

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Application Information

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IPC IPC(8): C07D307/68
CPCC07D307/68
Inventor 周光远王瑞姜敏王国强张强
Owner 芜湖万隆新材料有限公司
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