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Prepn of alkyl amidopropyldimethyl amine oxide surfactant

A technology of alkylamidopropyl dimethylamine oxide and alkylamidopropyl dimethylamine, which is applied in the directions of surface active detergent compositions, chemical instruments and methods, organic chemistry, etc., can solve the problem of short reaction time, Long reaction time and other problems, to achieve the effect of increasing the effective concentration, reducing the ineffective decomposition, and shortening the reaction time

Inactive Publication Date: 2007-01-03
上海高维化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the above-mentioned prior art has a long reaction time, the object of the present invention is to provide a method for preparing an alkyl amidopropyl dimethyl amine oxide surfactant with a short reaction time

Method used

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  • Prepn of alkyl amidopropyldimethyl amine oxide surfactant
  • Prepn of alkyl amidopropyldimethyl amine oxide surfactant
  • Prepn of alkyl amidopropyldimethyl amine oxide surfactant

Examples

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Effect test

Embodiment 1

[0016] Cocamidopropyl dimethylamine 100g, add 215g water, add the catalyst 2.1g of EDTA (52%), citric acid (8%), sodium citrate (16%), sodium bicarbonate (24%). 37g of 35% hydrogen peroxide solution was added dropwise, and reacted for 2.5 hours at 70°C to obtain a 30% alkylamidopropyl dimethyl amine oxide solution with a conversion rate of 99.7%.

Embodiment 2

[0018] Palmimidopropyl dimethylamine 100g, add 218g water, add the catalyst 2.3g of EDTA (62%), citric acid (14%), sodium citrate (10%), sodium bicarbonate (14%). 31 g of 35% hydrogen peroxide solution was added dropwise and reacted for 3 hours at a temperature of 70° C. to obtain a 31% alkylamidopropyl dimethyl amine oxide solution with a conversion rate of 99.8%.

Embodiment 3

[0020] Stearamidopropyl dimethylamine 100g, add 213g water, add the catalyst 2.0g of EDTA (14%), citric acid (6%), sodium citrate (37%), sodium bicarbonate (43%). 33.8 g of 30% hydrogen peroxide solution was added dropwise and reacted for 4 hours at a temperature of 70° C. to obtain a 30% alkylamidopropyl dimethyl amine oxide solution with a conversion rate of 99.6%.

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Abstract

The present invention relates to preparation process of alkyl amidopropyldimethyl amine oxide as surfactant. The preparation process includes the reaction between alkyl amidopropyldimethyl amine and hydrogen peroxide solution of 20-90 % concentration at 60-90 deg.c and in the presence of EDTA, citric acid, sodium citrate and sodium bicarbonate as catalyst for 2-4 hr to obtain alkyl amidopropyldimethyl amine oxide solution of 30 % or higher concentration in the conversion rate over 99.5 %. The prepared alkyl amidopropyldimethyl amine oxide may be used as surfactant widely used in detergent, cosmetics, textile assistant, medicine and other fields.

Description

technical field [0001] The invention relates to a preparation method of a surfactant, in particular to a preparation method of an alkyl amidopropyl dimethyl amine oxide surfactant which can be widely used in the fields of detergents, cosmetics, textile auxiliaries, medicine and the like. Background technique [0002] Alkyl amidopropyl dimethyl amine oxide is another surfactant with low irritation, fine and rich foam and good thickening performance launched after long-chain alkyl amine oxide in recent years. In addition to general surface activity, amine oxide In addition to the characteristics of the agent, it also has extremely low physiological toxicity, moisturizing, sterilizing, antiseptic and soft to the skin, so it can be widely used in the fields of detergent, cosmetics, textile auxiliaries and medicine. [0003] At present, most of the synthesis processes of alkylamine oxides use a single catalyst, the reaction time is long, and the product has poor stability and is ...

Claims

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Application Information

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IPC IPC(8): C07C291/04C11D1/75B01F17/16C09K23/16
Inventor 张未名
Owner 上海高维化学有限公司
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