Method and system for continuous kettle type industrial production of crude acetal product

A production method and technology of continuous kettle, applied in the field of continuous kettle industrial production method and system of crude acetal, can solve the problems of material and energy loss, unsuitability for large-scale industrial production, prolonging production cycle, etc., to achieve acetal The content is increased, which is beneficial to large-scale industrial production and the effect of inhibiting side reactions
CN111018907AActive Publication Date: 2020-04-17LIER CHEM CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LIER CHEM CO LTD
Publication Date
2020-04-17

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Abstract

The invention discloses a method and a system for continuous kettle type industrial production of a crude acetal product, and belongs to the technical field of chemical production. A feeding mode of simultaneously, preferably and continuously adding corresponding reaction materials in the same proportion is adopted, and particularly, the temperature is controlled, so that the whole reaction process is continuously carried out; compared with a feeding mode of dropwise adding an acrolein-weak acid mixture into diethyl methylphosphite in the prior art that, the feeding mode of the invention realizes the continuous kettle type reaction process for preparing the crude acetal product, so the problems existing in the intermittent kettle type production process are effectively solved; and the production efficiency of the crude acetal product is effectively improved, the production cost is reduced, and meanwhile, large-scale industrial production is facilitated.
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Description

technical field

[0001] The invention relates to the technical field of chemical production, in particular to a method and system for continuous-kettle industrial production of crude acetal. Background technique

[0002] Acetal is an intermediate of glufosinate-ammonium in fine chemical products. At present, there are many literature reports on how to prepare glufosinate, such as "Preparation Method of Glufosinate", Yan Haichang, He Hongdong, Pesticides, 2002, 41(9), P46-48. However, the traditional preparation methods generally have the problems of many reaction steps, low reaction yield and high production cost.

[0003] Hoechst's patent document "Method and intermediate for preparing glufosinate", notification number CN1267305A, uses methyl phosphonite as raw material, acid anhydride as condensation agent, and acrolein addition reaction in the presence of alcohol. The production method of acetal is produced by the batch-kettle Michel (Michael) addition method. Zhejiang ...

Claims

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