Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of high-yield preparation method of high-purity dimethyl diallyl ammonium chloride monomer

A dimethyl diallyl ammonium chloride high-yield technology, applied in the field of high-purity dimethyl diallyl ammonium chloride monomer high-yield preparation, can solve the problem of low reaction yield and process Complicated, many process steps, etc., to achieve the effect of low content, less impurities and high purity

Active Publication Date: 2020-08-04
SHANDONG TIANCHENG CHEM CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the process has many process steps, the process is relatively complicated and the reaction yield is low.
[0027] In summary, adopting one-step method and two-step method synthetic technique all have its deficiency, all can not obtain the dimethyl diallyl ammonium chloride monomer of high purity and high yield

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
  • A kind of high-yield preparation method of high-purity dimethyl diallyl ammonium chloride monomer
  • A kind of high-yield preparation method of high-purity dimethyl diallyl ammonium chloride monomer
  • A kind of high-yield preparation method of high-purity dimethyl diallyl ammonium chloride monomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A kind of preparation method of high-purity DMDAAC monomer high yield, its step is:

[0062] Tertiary amination reaction stage: pump 141kg of 40% dimethylamine aqueous solution into a sealed and pressure-resistant reactor equipped with speed-adjustable agitator, pressure gauge, online pH meter, cooling water pipe, heating water pipe, feeding pump, and vacuum pump , circulating water to maintain the temperature in the reactor at 25°C. The reaction kettle was sealed, and the pressure in the kettle was observed with a pressure gauge, and the reaction in the tertiary amination stage was started, and the temperature was controlled at 30°C. Described feeding pump, wherein chloropropene uses a pump, dimethylamine aqueous solution and sodium hydroxide aqueous solution can use a pump

[0063] Step (1): Add 60kg of allyl chloride dropwise into the reactor, and finish adding one-third of the amount of allyl chloride dropwise within 10min-20min, control the pressure in the kettle ...

Embodiment 2

[0073] A kind of preparation method of high-purity DMDAAC monomer high yield, its step is:

[0074]Tertiary amination reaction stage: pump 141kg of 40% dimethylamine aqueous solution into a sealed and pressure-resistant reactor equipped with speed-adjustable agitator, pressure gauge, online pH meter, cooling water pipe, heating water pipe, feeding pump, and vacuum pump , circulating water to maintain the temperature in the reactor at 25°C. The reaction kettle was sealed, and the pressure in the kettle was observed with a pressure gauge, and the reaction in the tertiary amination stage was started, and the temperature was controlled at 40°C. Described feeding pump, wherein chloropropene uses a pump, dimethylamine aqueous solution and sodium hydroxide aqueous solution can use a pump

[0075] Step (1): Add 65kg of allyl chloride dropwise into the reaction kettle, and finish adding one-third of the amount of allyl chloride dropwise in 10min-20min. Under reaction 1h.

[0076] St...

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 present invention belongs to the technical field of organic synthesis, and particularly relates to a method for preparing a high purity dimethyl diallyl ammonium chloride monomer in high yield. The preparation method provided by the present invention involves stagewise and alternating addition of allyl chloride and sodium hydroxide solution dropwise, the optimum alternate addition amounts and reaction times of allyl chloride and sodium hydroxide being determined using an acid-base indicator through extensive tests. The preparation method prevents allyl chloride from being present in a highly alkaline environment, which avoids generation of byproducts such as allyl alcohol in large amounts, and increases the utilization rate of allyl chloride. Further, the preparation method employs a pressure-resistant closed reaction vessel to ensure that dimethylamine does not leak and can participate completely in the reaction. The dimethyl diallyl ammonium chloride monomer solution obtained by the preparation method has a light color and few impurities, does not require decoloration and impurity removal with activated carbon, and has a high purity, has very low contents of amine salts and chlorine ions, and a yield approximate to an ideal value. Use of the product in a homopolymerization experiment affords a colorless, transparent and clear polymer solution, with the viscosity and molecular weight thereof being far superior to those of like products.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a high-yield preparation method of high-purity dimethyl diallyl ammonium chloride monomer. Background technique [0002] Dimethyl diallyl ammonium chloride (DMDAAC for short) monomer is a cationic monomer with a wide range of uses. There are two unsaturated double bonds and quaternary ammonium groups in the molecular structure, and it can be copolymerized with many unsaturated monomers. It is positively charged in aqueous solution to form cationic or zwitterionic polymers. It is mainly used to synthesize water-soluble polymers containing organic cations, which can improve the water solubility of polymers, solution rheology, increase adsorption capacity and bactericidal ability, etc. Its copolymers are widely used in water treatment, petroleum exploration, textile printing and dyeing, daily chemical industry and other fields. [0003] The synthesis of DMDAAC...

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): C07C209/08C07C209/12C07C209/84C07C211/63
CPCC07C209/08C07C209/12C07C209/84C07C211/63
Inventor 朱年德程飞冯斌张银广郭海东杨存新
Owner SHANDONG TIANCHENG CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com