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Condensation production process and special equipment of n-long-chain acyl amino acid salt

A long-chain acyl amino acid salt and long-chain acyl methyl taurate technology, which is applied in the direction of sulfonate preparation, carboxylic acid amide preparation, organic compound preparation, etc., can solve the problem of increasing acid chloride addition time, prolonging production cycle, Increase the dropping time and other issues to achieve the effect of increasing conversion rate, improving product quality and improving production efficiency

Active Publication Date: 2014-10-01
SHANGHAI OLI ENTERPRISES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the technology of the condensation process of N-long-chain acyl amino acid salts, the hydrolysis of the acid chlorides is suppressed by increasing the addition time of the acid chlorides or reducing the reaction temperature. However, a considerable part of the fatty acid acid chlorides will still be hydrolyzed, and the addition time is increased. Extend the production cycle
Reducing the reaction temperature, although the rate of acid chloride hydrolysis can be appropriately reduced, will also reduce the main reaction, that is, the reaction rate of N-long chain acyl sarcosinate

Method used

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  • Condensation production process and special equipment of n-long-chain acyl amino acid salt
  • Condensation production process and special equipment of n-long-chain acyl amino acid salt

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Embodiment 1

[0032] with attached figure 1 The single-pot reaction process shown in the synthesis of sodium lauroyl sarcosinate, the process is as follows: add sodium sarcosinate and pure water to the reactor 4 ' through the pipeline 6 (the specific consumption is determined by the volume of the reactor 4 '), so that the muscle The initial concentration of sodium phosphate is 12%-15% (w / w). Under the temperature condition of 10-15°C, the acid chloride is slowly added dropwise from the pipeline 8, and the stirring rate is increased as far as possible. During the process of adding lauroyl chloride , add sodium hydroxide dropwise from pipeline 5 to maintain the pH of the reaction solution at 9.5-10.5 until the addition of the acid chloride is completed and the material is discharged.

[0033]In the whole single-pot process, the molar ratio of sodium sarcosinate and lauroyl chloride is 1.05: 1.00. The average dropping time of 99% lauroyl chloride of 570kg is 8-12, and the average content of so...

Embodiment 2

[0035] with attached figure 2 Shown process of the present invention produces sodium lauroyl sarcosinate, and process is as follows: inject a certain amount of 25% sodium sarcosinate and a certain amount of pure water into storage tank 4 by pipeline 6 (concrete consumption is determined by the volume of storage tank 4 ), make the initial concentration of sodium sarcosinate aqueous solution be 12%-15% (w / w), under the temperature condition of 15-20 ℃, open storage tank 4 bottom valves and the upper circulation valve that connects pipeline reactor, open Pump, so that the mixed solution of sodium sarcosinate and water flows out from the bottom valve through the storage tank 4, passes through the pipeline reactor 1, and enters the storage tank 4 at a flow rate of 25m 3 / h. The purpose of this process is to mix the sodium sarcosinate and pure water evenly. After sodium sarcosinate and pure water are mixed evenly, lauroyl chloride is added to the circulation system of sodium sarc...

Embodiment 3

[0042] with attached figure 1 The single-pot reaction process shown in the synthesis of sodium lauroyl methyl taurate, the process is as follows: add sodium methyl taurate and the pure water of an equivalent amount of sodium methyl taurate to the reaction kettle 4' through the pipeline 6, the temperature Control the temperature at 5-10°C, slowly add acid chloride dropwise from pipeline 8, and at the same time increase the stirring rate as much as possible, add sodium hydroxide dropwise from pipeline 5 during the reaction, and maintain the pH of the reaction solution at 9.0-10.0. Until the dropwise addition of the acid chloride is completed, the material is discharged.

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Abstract

The invention relates to a production process and special device of the condensation process of N-long-chain acyl amino acid salt. By adopting the process and special device, the hydrolysis of acyl chloride can be inhibited and the content of the by-product fatty acid salt can be reduced in the condensation process of acyl amino acid type surfactant. Therefore, the weight of the surfactant can be increased, the content of fatty acid salt can be reduced by 50%-75% compared with the single-pot reaction, the conversion rate can be increased to more than 99%, the feeding ratio can be reduced, the condensation time can be shortened and the production efficiency can be increased.

Description

Technical field: [0001] The invention relates to a production process and special equipment for the condensation process of N-long chain acyl amino acid salt. Said equipment is a circulating feeding pipeline reactor device. The process and device of the present invention are also applicable to all amino acid surfactants synthesized by Schotten-Bauman reaction. Background technique: [0002] Surfactants are used as raw materials for various detergents and cosmetics. Depending on its properties and uses, liquid, solid, and pasty substances can be used. Liquid surfactants are mainly used as raw materials for cosmetic detergents such as shampoos and body washes. Compared with solid and paste surfactants, liquid surfactants are more fluid. [0003] N-long chain acyl amino acid salt is a mild anionic surfactant. It has the characteristics of good foamability and easy biodegradation. This surfactant is used as a washing raw material in the formulations of many cosmetic compan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C233/47C07C231/02C07C309/15C07C303/32B01J14/00B01J4/00
Inventor 胡敏青江志洁许君毅李习华
Owner SHANGHAI OLI ENTERPRISES CO LTD
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