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Improved process system for preparing hydroxyl esters

A process improvement, hydroxyester technology, applied in the preparation of carboxylate, the preparation of organic compounds, the separation/purification of carboxylate, etc., can solve the problems of improper handling, high cost, adverse environmental impact, etc., to avoid blockage , the effect of reducing pollution

Active Publication Date: 2014-07-23
JIANGSU CHENGXIN PHARMA
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Problems solved by technology

Then by distillation, the solvent is recovered, the inorganic salt is removed by water washing, and finally the product is obtained by extraction and concentration, which makes the cost of the synthesis method relatively high, and the reaction is difficult to control. Improper handling will pollute the environment and have adverse effects on the environment.

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  • Improved process system for preparing hydroxyl esters

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Embodiment Construction

[0010] The technology of the present invention will be further described below in conjunction with the accompanying drawings and specific examples, but the protection scope of the present invention is not limited to the following examples.

[0011] Such as figure 1 Shown, a kind of process improvement system for preparing hydroxy ester, comprises raw material tank 1, booster pump 5, circulation tank 2, separation tank 3, water tank 4, collecting tank 7, described raw material tank 1 and described The circulation tank 2 is connected by the pressurized pump 5 pipelines, and the upper filter layer 8 and the lower filter layer 9 are set in the described separation tank 3, and the upper filter layer 8 and the lower filter layer 9 separate the separation tank 3 is divided into three cavity parts, and the three cavity parts are respectively connected to the collection tank 7 by pipelines, and there are multiple collection tanks 7.

[0012] The lower end of the separation tank 3 ...

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Abstract

The invention relates to an improved process system for preparing hydroxyl esters. The improved process system comprises a raw material tank, a pressure pump, a circulation tank, a separation tank, a water tank and a collection tank, wherein the raw material tank is connected with the circulation tank by virtue of the pressure pump pipe, an upper filtering layer and a lower filtering layer are arranged in the separation tank, and the separation tank is divided into three cavities by the upper and lower filtering layers. The process system is applicable to the production in chemical and pharmaceutical industries.

Description

technical field [0001] The invention relates to the field of chemical industry. Background technique [0002] Hydroxyester is a pharmaceutical intermediate, and its downstream product, polyhydroxyester polymer, has good biocompatibility and can be degraded at a controlled rate and enter the metabolism. In the process of industrial production of hydroxy esters, ethyl 4-chloro-3-carbonylbutyrate is reacted with a large amount of anhydrous methanol to obtain a methanol solution of ethyl 4-chloro-3-hydroxybutyrate. Then by distillation, the solvent is recovered, the inorganic salts are removed by water washing, and finally the product is extracted and concentrated to obtain the product. This makes the synthesis method cost relatively high, and the reaction is difficult to control. Improper handling will pollute the environment and have adverse effects on the environment. Contents of the invention [0003] Purpose of the invention: In order to overcome the above defects, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/31C07C67/48C07C69/675
CPCC07C67/31C07C67/48C07C69/675
Inventor 邢将军刘加根许刘华
Owner JIANGSU CHENGXIN PHARMA
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