Dedevap continuous production method

A technology of dichlorvos and temperature control, applied in the production field of dichlorvos, can solve the problems of poor production stability and safety, product quality and yield cannot reach a better level, low production efficiency, etc., and achieve stable product quality and reduce energy. The effect of consumption and improving the efficiency of the device
CN1951944AInactive Publication Date: 2007-04-25荆州沙隆达控股有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
荆州沙隆达控股有限公司
Publication Date
2007-04-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparing method of continual manufacturing of atgard, which comprises the following steps: filling atgard base in the first grade reactor; adding trichloroacetaldehyde and trimethyl phosphite into the first grade reactor; controlling the temperature between 0 and 100 deg.c; flowing the reacting material from the first grade reactor to the second grade reactor; insulating at 0-100 deg.c.
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Description

technical field

[0001] The invention relates to a production method of dichlorvos, in particular to a preparation method of continuous production of dichlorvos. Background technique

[0002] Dichlorvos, chemical name: O, O-dimethyl-O-(2,2-dichlorovinyl) phosphate. It is an organophosphorus insecticide that is widely used in agricultural production and requires a large amount. The pure product is a colorless oily liquid, and the industrial product is an amber oily liquid. There are two ways to produce dichlorvos industrially: one is to produce dichlorvos by trichlorfon alkali hydrolysis; the other is to produce dichlorvos by reacting trimethyl phosphite with chloral. Trichlorfon-alkali hydrolysis method to prepare dichlorvos is gradually being eliminated due to complex process, low yield, high consumption and many wastes.

[0003] The batch reaction of trimethyl phosphite and chloral to prepare dichlorvos is the most widely used synthesis technology at present, but because ...

Claims

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