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Citrate anionic surface active agent and its preparation method

A surfactant, citric acid ester technology, applied in chemical instruments and methods, dissolution, chemical/physical processes, etc., can solve the problems of long process flow, low monoester salt content, low monoester conversion rate, etc. The effect of simple process, high content of monoester salt and high product purity

Inactive Publication Date: 2004-07-21
广州创越化工有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method has long process flow, high cost, low conversion rate of single fat and low purity of reaction product
Finally, the obtained citrate salt has a low content of monoester salt and high content of diester salt, which greatly affects the performance of the product in terms of irritation and degreasing power, thus greatly limiting the application of the product

Method used

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  • Citrate anionic surface active agent and its preparation method
  • Citrate anionic surface active agent and its preparation method
  • Citrate anionic surface active agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 63.1g (0.33mol) fatty alcohol and 59.4g (0.283mol) citric acid monohydrate in the 500ml there-necked flask that thermometer, stirrer, reflux condenser are equipped with, with 0.5g sodium carbonate as catalyzer, heat up under stirring. Control the reaction temperature to 110°C-120°C, react for 4-6 hours to obtain 114.6g of reaction product, and observe whether the reaction product is clear and transparent. Then take out the condenser, install a vacuum connection device, vacuumize at a temperature of 110°C to 120°C and a vacuum degree of -0.06 to -0.08Mpa for 2 to 4 hours, and cool to 40°C to 50°C. Weigh 20.4g (0.496mol) NaOH and dissolve it in 284.4g water to prepare NaOH aqueous solution, slowly add the NaOH aqueous solution to the above product while stirring, control the neutralization temperature at 60°C to 80°C, and obtain 419.4g of the product About 30% solid content of citrate sodium salt anionic surfactant.

Embodiment 2

[0023] In a 500ml three-necked flask equipped with a thermometer, a stirrer, and a reflux condenser, add 88.0g (0.299mol) of fatty alcohol ether (EO=1), 52.4g (0.249mol) of citric acid monohydrate, and 0.6g of sodium carbonate As a catalyst, the temperature was raised while stirring. Control the reaction temperature at 105°C to 115°C, react for 4 to 6 hours to obtain 108.1 g of the reaction product, and observe whether the reaction product is clear and transparent. Then take out the condenser, install a vacuum adapter, vacuumize at 105°C to 115°C and vacuum degree -0.06 to -0.08Mpa for 2 to 4 hours, cool to 40°C to 50°C, and weigh 21.1g (0.512mol) Dissolve NaOH in 270.8g of water, slowly add NaOH aqueous solution to the above product under stirring, control the neutralization temperature at 60°C to 80°C, and obtain about 400.4g of citrate sodium salt anionic surfactant with a solid content of 30%.

Embodiment 3

[0025] In a 500ml three-necked flask equipped with a thermometer, a stirrer, and a reflux condenser, add 77.4g (0.261mol) of fatty alcohol ether (EO=2.5), 45.8g (0.218mol) of citric acid monohydrate, and 0.6g of sodium carbonate As a catalyst, the temperature was raised while stirring. Control the reaction temperature at 105°C to 115°C, react for 4 to 6 hours to obtain 109.5 g of the reaction product, and observe whether the reaction product is clear and transparent. Then take out the condenser, install a vacuum connection device, vacuumize at 105°C to 115°C and vacuum degree -0.06 to -0.08Mpa for 2 to 4 hours, cool to 40°C to 50°C, and weigh 18.5g (0.449mol) Dissolve NaOH in 276.8g of water, slowly add NaOH aqueous solution to the above product under stirring, control the neutralization temperature at 60°C to 80°C, and obtain about 407.3g of citrate sodium salt anionic surfactant with a solid content of 30%.

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Abstract

A citrate anionic surfactant is prepared through catalytic reaction between emtrol or emtrol ether and monohydrated citric acid, vacuum treating, and neutralizing with alkaline solution. Its advantages are high conversion rate of monoester, high purity, low defatting power and good biodegradability.

Description

technical field [0001] The invention relates to a surfactant and a preparation method thereof, in particular to a citrate anion surfactant and a preparation method thereof. Background technique [0002] At present, citrate salt anionic surfactants prepared by traditional methods have complex components, usually containing monoesters, diacid triesters and unreacted residues. The preparation method used is to react citric acid with acetic anhydride, ester and active hydroxyl value alkyl groups to obtain the desired product. The preparation method has long process flow, high cost, low single fat conversion rate and low purity of the reaction product. Finally, the monoester salt content of the obtained citrate salt is low and the diester salt content is high, so that the performance of the product in terms of irritation and degreasing power is greatly affected, thereby greatly limiting the application of the product. Contents of the invention [0003] The object of the prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K23/00
Inventor 唐永
Owner 广州创越化工有限公司