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

Synthesis of high-purity N-acyl-N-methyl sodium sulfate

A technology of sodium methyl taurate and a synthetic method, which is applied in the field of surfactant synthesis, can solve the problems of organic solvent consumption, high cost, troublesome operation, etc., and achieve the effect of high product purity and low saponified impurity fatty acid sodium

Active Publication Date: 2005-10-12
SHANGHAI OLI ENTERPRISES CO LTD
View PDF1 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water content in the system needs to be below 5%, consumes a large amount of organic solvents, and uses high-concentration sodium N-methyl taurate as raw material, which is troublesome to operate and high in cost

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
  • Synthesis of high-purity N-acyl-N-methyl sodium sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In a 500ml four-necked flask, add 139.6g (0.22 mol) of an aqueous solution of N-methyl taurine with a concentration of 25.73%, add 80ml of acetone, stir evenly, cool to 15°C ± 2°C, slowly and uniformly drop in laurel 44 g (0.2 mol) of acid chloride, at the same time, drop into 50% aqueous sodium hydroxide solution, carefully control the pH of the reaction solution between 9 and 10, and finish dropping in about 2 hours. Continue to keep the pH between 9 and 10 at 20°C to 30°C for 2 to 3 hours (until the pH remains unchanged). The obtained white paste reactant was placed in the refrigerator overnight, filtered to dryness, treated with 50% acetone aqueous solution, and dried at 60 °C to obtain 59.53 g of white powdery sodium N-lauroyl-N-methyl taurate crystals in a yield of 59.53 g. 86.65%.

[0020] Analysis: Actives 95.32% Sodium Laurate 1.56%

[0021] Sodium chloride 1.99% Weight loss 0.32%

[0022] I.R(cm -1 )3452 2920 2851 1640

[0023] ...

Embodiment 2

[0025] In a 500ml four-necked flask, add 139.6g (0.22 mol) of an aqueous solution of N-methyl taurine with a concentration of 25.73%, add 80ml of ethanol, stir and mix, cool to 16°C, and dropwise slowly and uniformly within 2 hours 48.6 grams (0.2 moles) of lauroyl chloride, at the same time, drop in 50% aqueous sodium hydroxide solution, control the pH of the reaction solution to be between 9 and 10, drop it in about 2 hours, and then react at about 20 ° C for 3 hours, ( Keep pH 9~10), put in refrigerator overnight, filter, wash with 50% ethanol, and dry to obtain 56.65 g of white N-lauroyl-N-methyl taurate sodium crystals, with a yield of 82.4%.

[0026] Analysis: Actives 93.01% Sodium Laurate 0.73%

[0027] Sodium chloride 1.35% Weight loss 1.54%

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

Synthesis of high-purity N-acyl-N-methyl-sodium taurine is carried out by reacting N-acyl-N-methyl-sodium taurine with fatty acyl chloride under inorganic base condition in water and hydrophilic mixed dissolving medium. It achieves convenient operation and industrial production.

Description

technical field [0001] The invention relates to a method for synthesizing a surfactant, in particular to a method for synthesizing high-purity sodium N-acyl-N-methyl taurate. Background technique [0002] Sodium N-acyl-N-methyl taurate has been used as a surfactant for a long time. It is widely used in cosmetics because of its good detergency on hair, good softness and little irritation to the skin. [0003] Industrially available higher fatty acids and their anhydrides, esters or acid chlorides, and N-methyl taurine sodium acylation derived. The commonly used method is the Schott-Baumann method, which is obtained by acylating fatty acid chlorides with sodium N-methyl taurine in an alkaline aqueous solution. The product obtained as (Public Patents: Hei 4-154756, Hei 2-218657) is a "paste-like" aqueous solution. The purity is not high and there are many impurities, so special methods are required to purify. (Hei 4-149169, Zhao 62-63555) is quite inconvenient, and a high-p...

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): C07C303/22C07C309/15
Inventor 初白江志洁黄骁
Owner SHANGHAI OLI ENTERPRISES 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