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Synthesis method for cationic bleaching activating agents with surface activity

A bleach activator, cationic technology, applied in the field of synthesis of cationic bleach activators, can solve the problems of limited application, poor water solubility, low activity and the like

Inactive Publication Date: 2014-02-05
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor water solubility of TAED largely limits its application in industrial bleaching; moreover, the bleaching efficiency of TAED-activated hydrogen peroxide system is not high at temperatures below 70 °C
NOBS needs to be applied under alkaline conditions (pH>10). If the pH is too low (close to neutral), the generated peroxyacid can continue to undergo nucleophilic substitution reaction with NOBS to form a less active diacyl peroxide, reducing the Bleaching efficiency

Method used

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  • Synthesis method for cationic bleaching activating agents with surface activity
  • Synthesis method for cationic bleaching activating agents with surface activity
  • Synthesis method for cationic bleaching activating agents with surface activity

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] Example 1: Synthesis of 4-chloromethylbenzoyl valerolactam

[0014] Add 0.1 mol of valerolactam into a 500 mL three-neck flask filled with 0.15 mol of triethylamine and 110 mL of toluene, and after being protected by argon, slowly heat to boiling and reflux under magnetic stirring. Slowly add 50 mL of toluene solution dissolved with 0.1 mole of 4-chloromethylbenzoyl chloride into a three-necked flask, condense and reflux for 6 hours under magnetic stirring. After the reaction is complete, cool to room temperature. After filtration, the filtrate was refrigerated overnight. The precipitated white precipitate was filtered off, washed with cold toluene and dried in vacuum for use.

example 2

[0015] Example 2: N-[4-(Dimethylhexylammoniummethylene)benzoyl]caprolactam chloride

[0016] Dissolve 0.1 mole of 4-chloromethylbenzoyl valerolactam in 150 mL of acetonitrile, and after being protected by argon, slowly heat to boiling under magnetic stirring and reflux, then dissolve 50 mL of 0.15 mole of dimethylhexylamine The acetonitrile solution was added slowly and reacted for 6 hours. After the reaction was completed, the solvent was removed by evaporation. 100 mL of acetone was added at room temperature, and the mixture was rapidly heated and then cooled to room temperature. After standing for some time, the precipitated white solid was filtered off and dried.

example 3

[0017] Example 3: N-[4-(Dimethyldodecylammoniummethylene)benzoyl]caprolactam chloride

[0018] Dissolve 0.1 mole of 4-chloromethylbenzoyl valerolactam in 150 mL of tetrahydrofuran, and after being protected by argon, slowly heat to boiling under magnetic stirring and reflux, then dissolve 50 mL with 0.15 mole of dimethyl dodecane The tetrahydrofuran solution of base amine was added slowly, and reacted for 6 hours. After the reaction was completed, the solvent was removed by evaporation. 100 mL of n-hexane was added at room temperature, and the mixture was rapidly heated and then cooled to room temperature. After standing for some time, the precipitated white solid was filtered off and dried.

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Abstract

The invention relates to a synthesis method for cationic bleaching activating agents with surface activity, belonging to the field of fine chemical engineering. According to the method, a series of cationic bleaching activating agents with different carbon chain-length quaternary ammonium salt groups are synthesized by adopting alkyl dimethyl tertiary amine, 4-(chloromethyl)benzoyl chloride and lactam as intermediates. The leaching activating agent has stronger affinity on the surface of a material with surface electronegativity in an aqueous solution, can react with hydrogen peroxide on the surface of the material to produce extremely active peroxy acid, can bleach the material at a low temperature so as to effectively remove the pigment impurities on the surface of the material. The cationic bleaching activating agent can be used for industrial bleaching and household washing of textiles.

Description

technical field [0001] The invention discloses a method for synthesizing a cationic bleach activator with surface activity, which belongs to the field of fine chemical industry. technical background [0002] Hydrogen peroxide is a bleaching agent widely used in industry. In the traditional hydrogen peroxide bleaching process, hydrogen peroxide usually works under the conditions of strong alkali (pH11-12, adding sodium hydroxide or sodium carbonate) and high temperature (close to 100°C), which will not only cause huge energy consumption, but also It will also increase the burden of factory wastewater treatment; in addition, it will also cause serious damage to the substrate to be bleached (for example: cotton fiber). [0003] Bleach activators are the precursors of organic peroxyacids, which can react with hydrogen peroxide in aqueous solution to produce peroxyacids. Compared with hydrogen peroxide, peroxyacid has higher activity and can effectively remove colored impuritie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D223/10C11D3/395C11D3/32D06L3/02D06L4/12D06L4/13
CPCC07D223/10C11D3/32C11D3/3927D06L4/15
Inventor 许长海位东王孟泽龙晓霞杜金梅
Owner JIANGNAN UNIV
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