Isoester continuous production process and reactor

A production process and reactor technology, which is applied in the field of isoester continuous production process and reactor, and can solve the problems of low conversion rate of sodium thiocyanate and dichloropropene

Pending Publication Date: 2022-05-27
河北野田农用化学有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a continuous isoester production process and reactor, which s

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Isoester continuous production process and reactor
  • Isoester continuous production process and reactor

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts are all related to the protection scope of the present invention.

[0032] like figure 1 As shown, the present embodiment proposes an isoester continuous production process, comprising the following steps:

[0033] S1, sodium thiocyanate aqueous solution and dichloropropene are passed through successively through cyanide reaction column one, through cyanide reaction column two, and after the reaction of thermal stratifier one, product A and product B are obtained;

[0034] S2, the product A is passed into the distillation colu...

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

PUM

No PUM Login to view more

Abstract

The invention relates to the technical field of isoester synthesis, and provides an isoester continuous production process which comprises the following steps: S1, sequentially introducing a sodium thiocyanate aqueous solution and dichloropropene into a first cyanogen-passing reaction column, a second cyanogen-passing reaction column and a first thermal layering device for reaction to obtain a product A and a product B; s2, the product A is introduced into a distillation tower for a reaction, a product C and a product D are obtained, the product B and dichloropropene are sequentially introduced into an alkene-passing reaction column I, an alkene-passing reaction column II and a thermal layering device II for a reaction, and a product E and a product F are obtained; s3, introducing the product D and the product F into a cyanogen-passing reaction column I; s4, the product E is introduced into a wastewater evaporation separation coupler for a reaction, and a product G and a product H are obtained. Through the technical scheme, the problem of low conversion rate of sodium thiocyanate and dichloropropene in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of isoester synthesis, in particular to a continuous isoester production process and a reactor. Background technique [0002] Thiamethoxam is a second-generation nicotinic high-efficiency and low-toxicity insecticide with a brand-new structure. It has stomach toxicity, contact killing and systemic activity against pests. It is used for foliar spraying and soil irrigation. It is quickly absorbed by the system after spraying, and is transmitted to all parts of the plant, which has a good control effect on piercing-sucking pests such as aphids, planthoppers, leafhoppers, and whiteflies. [0003] In the preparation of thiamethoxam, 2-chloro-5-chloromethylthiazole, the precursor of thiamethoxam, needs to be obtained first, and 2-chloropropenyl isosulfide needs to be obtained first in the preparation of 2-chloro-5-chloromethylthiazole Cyanate ester, wherein, 2-chloropropenyl isothiocyanate is obtained by sodium t...

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

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07C331/22B01D3/00B01J4/02B01J19/00B01J19/24
CPCC07C331/22B01J19/0053B01J19/24B01J19/00B01J4/02B01J19/0006B01D3/00B01D3/009Y02P20/10
Inventor 夏金科周扬刘建峰郭永亮任晓倩朱西志刘占民
Owner 河北野田农用化学有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap