Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for continuous production of 0,0-dimethyl thiophosphoryl chloride

A technology of dimethylphosphorylthioate and methylphosphorylthiodichloride, which is applied in the field of continuous preparation of O, can solve the problems of low equipment utilization, long reaction time, and low yield, and it is very easy to achieve production capacity Amplify, improve labor productivity and reduce labor intensity

Active Publication Date: 2011-08-17
XIANGTAN UNIV +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional process adopts batch production mode, which has the characteristics of long reaction time, low equipment utilization rate, low yield, unstable product quality, and small production capacity of a single reactor.

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
  • Method for continuous production of 0,0-dimethyl thiophosphoryl chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 1mol of O-methylphosphorylthiodichloride and 4.8mol of methanol into the first-stage reactor, and at the same time add 0.46mol of alkali to the first-stage reactor, and control the temperature of each stage of the reactor: -5~0 ℃, add 0.31mol alkali to the second stage reactor, add 0.16mol alkali to the third stage reactor, and add 0.12mol alkali to the fourth stage reactor. The reaction mixture was washed with water and separated into layers to obtain O, O-dimethylphosphorylthiochloride with a mass content of 91.3%.

Embodiment 2

[0021] Add 100kmol of O-methylphosphorylthiodichloride and 600kmol of methanol into the first-stage reactor, and at the same time add 35kmol of alkali to the first-stage reactor, and control the temperature of each stage of the reactor: -8~-2°C , add the alkali of 20kmol in the second-stage reactor, add the alkali of 15kmol in the third-stage reactor, add the alkali of 10kmol in the fourth-stage reactor, add the alkali of 10kmol in the fifth-stage reactor, and react in the sixth stage Add 5kmol of alkali to the reactor, and add 5kmol of alkali to the seventh-stage reactor. The reaction mixture enters the oil-water separator after being washed with water, and is layered to obtain O, O-dimethylphosphoryl thiochloride, with a mass content of 92.6%.

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 a continuous preparation method of 0, 0-dimethyl thiophosphoryl chloride, which comprises adding 0-methyl thiophosphoryl chloride, methanol and alkali continuously into a combination reactor composed of serial multistage reactors, adding alkali into the reactor at each stage, using a hydraulic cyclone to separate the material continuously flown outside the reactor, using the oil phase as product, and feeding water phase into a settler to further separate residual 0, 0-dimethyl thiophosphoryl chloride, recovers methanol in the water phase, and removes waste water. The invention has high reaction yield and equipment utilization, high product quality, short reaction time and reduced production cost, which can continuously prepare 0, 0-dimethyl thiophosphoryl chloride.

Description

technical field [0001] The invention relates to a method for continuously preparing O, O-dimethylphosphoryl thiochloride. Background technique [0002] O, O-dimethylphosphoryl thiochloride is an important intermediate in the production of chlorpyrifos methyl, acephate, and methamidophos. At present, the traditional reaction process for industrial production of O, O-dimethylphosphoryl thiochloride , using a stirred reactor for intermittent production. The reaction is to add O-methylphosphoryl thiodichloride first, then quickly add methanol, control the reaction temperature -5 ~ 0°C, and add alkali dropwise. After each batch of reaction is completed, the output is static Separate layers to obtain O, O-dimethylphosphoryl thiochloride. The reaction equation is as follows: [0003] [0004] The traditional process adopts a batch production method, which has the characteristics of long reaction time, low equipment utilization rate, low yield, unstable product quality, and sma...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/42
Inventor 罗和安艾秋红王良芥刘平乐刘志明张彬彬张方灯刘孝平从兴红
Owner XIANGTAN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com