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

Process of preparing alcohol ether glucoside citrate monoester salts

A technology of citric acid glycosides and alcohol ether glycosides, which is applied in the field of preparing alcohol ether glycoside citric acid monoester salts, can solve the problems of difficult separation, low surface activity, etc. Effect

Inactive Publication Date: 2012-06-20
CHINA RES INST OF DAILY CHEM IND
View PDF6 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the citric acid molecule contains multiple esterifiable groups, the esterification products are mostly mixtures of monoesters, diesters and triesters, and are not easy to separate
Citrate diesters and triesters have low surface activity and are generally not used as surfactants

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
  • Process of preparing alcohol ether glucoside citrate monoester salts
  • Process of preparing alcohol ether glucoside citrate monoester salts
  • Process of preparing alcohol ether glucoside citrate monoester salts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In a 250ml four-neck flask equipped with a thermometer, agitator, and condenser, add 0.2mol of anhydrous citric acid and 0.6mol of propionic anhydride to mix, then heat at 40°C, react for 90min, and add 1 times the volume of the reaction product. Squalane, control the pressure at 30mmHg, react for 1h to remove volatiles in the system. Add 0.25 mol of alcohol ether glycosides into the reactor, and react for 3 hours at 60°C and 10mmHg.

[0028] After the product was cooled, it was placed in a separatory funnel to separate layers, and the squalane was removed. Neutralize with 50% sodium hydroxide aqueous solution until the pH value is 9 to obtain alcohol ether glycoside citrate monoester disodium salt with a product yield of 95% and a monoester salt content of 90%.

Embodiment 2

[0030] In a 500ml four-necked flask equipped with a thermometer, a stirrer and a condenser, add 0.3mol of anhydrous citric acid, 0.3mol of butyric acid and 0.6mol of butyric anhydride, heat to 90°C, and react for 15min. Add squalane 2 times the volume of the reaction product, control the pressure at 5 mmHg, react for 1 h to remove volatiles in the system. Add 0.3mol of alcohol ether glycosides into the reactor, and react for 2 hours at 100°C and 15mmHg.

[0031] After the product was cooled, it was placed in a separatory funnel to separate layers, and the squalane was removed. Neutralize with 40% potassium hydroxide aqueous solution until the pH value is 7 to obtain alcohol ether glycoside citrate monoester dipotassium salt with a product yield of 90% and a monoester salt content of 92%.

Embodiment 3

[0033] Add 0.6 mol of anhydrous citric acid, 1.2 mol of valeric acid and 1.2 mol of valeric anhydride into a 1000ml four-necked flask equipped with a thermometer, a stirrer, and a condenser, heat to 50°C, and react for 60 minutes. Add squalane 3 times the volume of the reaction product, control the pressure at 20 mmHg, react for 2 hours to remove volatiles in the system. Add 0.6 mol of alcohol ether glycoside into the reactor, react at 90°C and 20mmHg for 2h.

[0034] After the product was cooled, it was placed in a separatory funnel to separate layers, and the squalane was removed. Neutralize with ammonia solution until the pH value is 8 to obtain alcohol ether glycoside citrate monoester diammonium salt with a product yield of 95% and a monoester salt content of 93%.

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 discloses a process of preparing alcohol ether glucoside citrate monoester salts. The method comprises the following steps of: loading organic acid anhydrides, organic acids and anhydrous citric acid at a molar ratio of (1 to 3):(0 to 2):1 into a reactor, and allowing reactions to take place at 40 to 90 DEG C for 15 to 90 min, to obtain a reaction product; adding a dispersing medium 1 to 5 times the volume of the reaction product into the reaction product, and removing volatile substances under a pressure of 5 to 40 mmHg; adding alcohol ether glucoside to the reactor, allowing reactions to take place at 60 to 110 DEG C and 5 to 20 mmHg for 1 to 3 hours to obtain a mixture, wherein the molar ratio of alcohol ether glucoside to citric acid is 1:(0.8 to 1.2); and performing hierarchical separation on the mixture, recycling the separated dispersing medium, and adjusting pH of the product to 6 to 9 with an alkaline solution, to obtain alcohol ether glucoside citrate monoester salts. The process is advantageous in increasing monoester content.

Description

technical field [0001] The invention belongs to a process for preparing alcohol ether glycoside citrate monoester salt. technical background [0002] Alcohol ether glycoside (AEG) is a glycosidation product obtained by catalytic condensation of fatty alcohol ether and anhydrous glucose. It has similar excellent properties to alkyl glycoside (APG), such as good surface activity, good detergency, low toxicity, Easy to biodegrade etc. And because of the presence of polyoxyethylene (EO) in the molecule, it can make up for the unsatisfactory water solubility of long carbon chain APG. Citrate surfactants have good emulsifying, wetting, solubilizing and dispersing capabilities, and are also a "green chemical product" that is non-toxic, non-polluting, non-irritating and has good biodegradability. Alcohol ether glycoside citrate has the advantages of both alcohol ether glycoside and citrate surfactants, and is a new type of green surfactant. [0003] Since the citric acid molecule...

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 Applications(China)
IPC IPC(8): C07H1/00C07H15/08C08B37/02C08G65/00
Inventor 杨秀全牛少勇白亮张军
Owner CHINA RES INST OF DAILY CHEM IND