Production method and equipment for reducing buprofezin impurities

A technology for thiazide and impurities, which is applied in the field of production methods and equipment for reducing thiazide impurities, can solve the problem of high impurity content of M291, and achieve the effects of improving yield, improving stirring stability and improving process methods.
CN112827445AInactive Publication Date: 2021-05-25JIANGSU ANPON ELECTROCHEM
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU ANPON ELECTROCHEM
Publication Date
2021-05-25
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses equipment for reducing buprofezin impurities. The equipment comprises a kettle body, a power bearing, a stirring shaft and a supporting frame, wherein the power bearing comprises a motor, a driving shaft and a rotor, and the rotor is meshed with the kettle body. The invention also discloses a production method of the equipment for reducing the buprofezin impurities. The method comprises the following steps: adding tert-butyl isothiocyanate in a drying reaction kettle, heating, vacuumizing, and keeping the temperature and stirring in vacuum. The equipment is improved on the basis of the prior art, such that the stirring stability of the kettle body is effectively improved, the M291 impurity can be conveniently removed so as to improve the yield of the intermediate 1-isopropyl-3-tert-butylthiourea, the process method is improved, and the purposes of controlling the impurity M291 is achieved through the simple process operation, and therefore, the aim of conforming to production is fulfilled.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of pesticide production, in particular to a production method and equipment for reducing buprofezin impurities. Background technique

[0002] Pudiling is a new type of insect growth regulator with high efficiency, long-lasting effect, strong selectivity and safety. It is currently the leading species for controlling rice planthoppers. Tert-butyl alcohol reacts in the presence of hydrochloric acid to obtain a mixture of tert-butyl thiocyanate and tert-butyl isocyanate (referred to as mixed ester), which is translocated to obtain tert-butyl isothiocyanate (abbreviated as isoester), and then reacted with isopropylamine Reaction to obtain 1-isopropyl-3-tert-butylthiourea (referred to as thiourea). In addition, react N-methyl-N-phenylcarbamoyl chloride with N-methylamine and phosgene, and then react with chlorine gas to obtain N-chloromethyl-N-phenylcarbamoyl chloride (chloride for short). Finally, the chloride...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More