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Process for producing ethyl levulinate

A technology of ethyl levulinate and production process, which is applied in the directions of carboxylate preparation, organic chemistry, chemical instruments and methods, etc., can solve the problems of producing more waste water, low conversion rate, low output and the like, saving raw materials, simplifying Production process, the effect of improving product purity and yield

Inactive Publication Date: 2010-01-06
浦杰香料(上海)有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of ethyl levulinate production process, solve the prior art low conversion rate, low yield, high cost, poor aroma and the problem that each batch of reaction produces waste water after washing

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  • Process for producing ethyl levulinate

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Embodiment Construction

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] The esterification reaction is a typical reversible reaction. The reaction rate of the esterification reaction is inversely proportional to the concentration of the product and directly proportional to the concentration of the reactant. Therefore, in order to effectively promote the transfer of the reaction to the direction of the forward reaction, the best way is to lead the product out of the reaction system at any time. Reduce the concentration of the product while continuously feeding into the reaction pot to increase the concentration of the raw material, thereby reducing the concentration of ethyl levulinate that has been generated, and promoting the esterification reaction to continue in the direction of the positive reaction.

[0020] The present invention relates to a kind of ethyl levulinate production technique, it is characterized in...

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Abstract

The invention aims to provide a process for producing ethyl levulinate to solve the problems of low conversion rate, low yield, high cost, poor fragrance and much wastewater generated after the reaction and washing in each batch in the prior art. The process has the advantages that: the process can ensure the esterification speed in the production process to make raw materials fully reacted, improve the impurity, yield and quality of the product, save the raw materials, improve the production capacity of equipment, and simplify production process; and the product produced by the process is not needed to be neutralized, washed and refined to meet the perfume level standard, saves energy, protects environment, saves water resource, greatly reduces the generation of three waste, has wide application, and is suitable for perfume industry, organic synthesis, food industry and the like.

Description

technical field [0001] The invention relates to an esterification reaction in the production process of ethyl levulinate, in particular to a production process of ethyl levulinate. Background technique [0002] Ethyl levulinate is an edible spice allowed by China GB 2760-2007, mainly used for removing nicotine from tobacco essence, and also used for fruit preservation. [0003] Retrieval of relevant documents such as the Chinese Patent Index CD-ROM shows that: currently, research on the production process of ethyl levulinate has not seen the research on the esterification process similar to the present invention. [0004] According to the second edition of "Encyclopedia of Chinese Chemical Products" (Chemical Industry Press, second edition in June 1998, edited by Chemical Industry Press, page 739), the preparation method of ethyl levulinate is to adopt levulinic acid, ethanol It is formed by esterification in benzene or toluene in the presence of sulfuric acid. The traditi...

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Application Information

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IPC IPC(8): C07C69/716C07C67/08
Inventor 张桂华丁秉钧
Owner 浦杰香料(上海)有限公司
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