Synthesis process of dialkyl dimethyl ammonium chloride

A technique for the synthesis of dialkyl dimethyl ammonium halides, which is applied in the field of synthesis processes of dialkyl dimethyl ammonium halides, can solve problems such as low safety, complex processes, and high costs, and achieve increased safety and process The effect of simple process and equipment and low production cost

Inactive Publication Date: 2021-03-09
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of complex process, low safety and high cost of synthesizing dialkyl dimethyl ammonium halides existing in the prior art, the invention provides a synthesis process of dialkyl dimethyl ammonium halides, which avoids Improve the use of gas raw materials, safe and efficient, and suitable for industrial production

Method used

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  • Synthesis process of dialkyl dimethyl ammonium chloride
  • Synthesis process of dialkyl dimethyl ammonium chloride

Examples

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Effect test

Embodiment 1

[0026] Add 157g of octyl dimethyl tertiary amine and 148g of 1-chlorooctane into the autoclave, seal it and place it in an oven raised to 130°C in advance, and react at a constant temperature for 4 hours. After cooling down, add 300g of it in a volume ratio of 5:1 The mixed solution of water and ethanol is diluted to obtain 605 g of dioctyldimethylammonium chloride aqueous solution with an active content of 49.64%. The conversion rate of reaction materials (calculated as tertiary amine) is 98.46% based on product activity (detected by tetraphenylborax titration colorimetric method), and the chloride ion content is 5.79%.

Embodiment 2

[0028] Add 213g of dodecyldimethyl tertiary amine and 204g of 1-chlorododecane into the autoclave, seal it and place it in an oven raised to 150°C in advance, and react at constant temperature for 4 hours. After cooling down, add 400g of volume ratio 3 : 1 water and ethanol mixed solution dilution, get active content and be 50.49% dioctyl dimethyl ammonium chloride aqueous solution 817g. The conversion rate of reaction materials (calculated as tertiary amine) is 98.92% based on product activity (detected by tetraphenylborax titration colorimetric method), and the chloride ion content is 4.30%.

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Abstract

The invention discloses a synthesis process of dialkyl dimethyl ammonium halide, which comprises the following steps: mixing primary alkyl halide R1X and long-chain alkyl dimethylamine R2(CH3)2N, heating to 130-150 DEG C in a closed container, keeping the temperature to react for 4-6 hours, cooling, and diluting with an ethanol water solution to obtain dialkyl dimethyl ammonium halide, wherein thereaction temperature is determined by the number of carbon atoms of R1 and R2, and the formula is 130 DEG C+2.5(CR1+CR216)DEG C. Primary alkyl halide and long-chain alkyl dimethylamine directly reactto generate dialkyl dimethyl ammonium halide, so that the use of flammable and combustible gaseous raw materials is avoided, and the production safety is improved, the production process flow and equipment are simple, the production cost is low, industrial popularization is facilitated, no acid or salt byproduct is generated, and the product is high in purity, free of three wastes and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of synthesis of fine chemicals, in particular to a synthesis process of dialkyl dimethyl ammonium halides. Background technique [0002] Quaternary ammonium salt, also known as quaternary ammonium salt, has similar properties to inorganic salts, is easily soluble in water, and its aqueous solution can conduct electricity. It is mainly prepared by the reaction of ammonia or amine with primary haloalkane. It has a wide range of uses and can be used as bactericide and algicide, softener, antistatic agent, flocculant, demulsifier, drilling fluid, VES fracturing fluid, drag reducer, thickener and anionic synergist, etc. [0003] In recent years, the research on quaternary ammonium salts, adhering to the traditional advantages of environmental protection, easy biodegradation, and less toxic and side effects, has developed a series of products. From the simplest alkyl dimethyl benzyl ammonium chloride to dialkyl ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/63C07C209/12
CPCC07C209/12C07C211/63
Inventor 程终发张振
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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