Production method of 1,1,3-trichloroacetone

A technology of trichloroacetone and dichloroacetone, applied in chemical instruments and methods, preparation of organic compounds, separation/purification of carbonyl compounds, etc., can solve the problems of high folic acid production cost, complicated process, and low product purity, and achieve Improving product competitiveness, avoiding separation operations, and making the process green and environmentally friendly
CN113548949AActive Publication Date: 2021-10-26常州新东化工发展有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
常州新东化工发展有限公司
Publication Date
2021-10-26

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Abstract

The invention discloses a method for producing 1,1,3-trichloroacetone, belonging to the technical field of chemical product preparation. The method comprises the following steps: with acetone as a raw material, synthesizing 1,1,3-trichloroacetone in an inert solvent through photocatalytic chlorination, recovering a solvent, acetone, monochloroacetone, 1,1-dichloroacetone and other light components from a chlorination solution in a rectification manner, separating the intermediate component 1,3-dichloroacetone from 1,1,3-trichloroacetone in a simulated moving bed filled with an adsorbent to obtain 1,1,3-trichloroacetone, conducting eluting with a desorption agent to obtain a desorption solution containing 1,3-dichloroacetone and 1,1,3-trichloroacetone, distilling the desorption solution to remove the solvent, and then returning the desorption solution to a chlorination kettle for indiscriminate application. The method has the characteristics of mild reaction conditions, high reaction rate, high selectivity of 1,1,3-trichloroacetone, low wastewater discharge amount, environment-friendly process and the like.
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Description

technical field

[0001] The invention relates to a production method of 1,1,3-trichloroacetone, belonging to the technical field of chemical product preparation. Background technique

[0002] 1,1,3-Trichloroacetone is a colorless, transparent liquid with a strong pungent odor. It is mainly used as an important intermediate for the synthesis of folic acid, and is also widely used in medicine, pesticides, spices and dyes. At present, the main methods for preparing 1,1,3-trichloroacetone include acetone direct chlorination method, acetone indirect chlorination method and acetone catalytic chlorination method.

[0003] For example, in CN106542979A, acetone is reacted with 2-alkylaniline to form an imine, and then chlorinated to obtain 1,1,3-trichloroacetone with a yield of 80%, but the reaction process needs to use a large amount of sodium hydroxide to adjust the pH, resulting in More salty wastewater. CN105461529A chlorinated acetone in methanol to first generate 1,3-dichloroa...

Claims

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