Method for cleanly producing high-purity (methyl) acryloyl ethoxy benzyldimethyl ammonium chloride

A technology of acryloyloxyethylbenzyldimethylammonium chloride and dimethylaminoethyl acrylate, applied in chemical instruments and methods, preparation of amino compounds, preparation of organic compounds, etc., can solve the problem of cationic monomer aqueous solution The problems of low purity and high unit consumption of raw materials can achieve the effect of low volatility, high boiling point and low vapor pressure.

Inactive Publication Date: 2010-06-02
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the hydrolysis side reaction of (meth) dimethylamino ethyl acrylate and benzyl chloride in water solvent is serious, and is unavoidable, and the cationic monomer aqueous solution purity of production is low, and raw material unit consumption is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Open the stirrer of 1000 liters of reactors, drop into 600 kilograms of methyl benzoate, 200 kilograms of dimethylaminoethyl acrylate, 200 kilograms of benzyl chloride and 0.3 kilogram of potassium iodide under room temperature, blow into N 2 After deoxygenation for 10 minutes, heat up to keep the material temperature in the reactor at 35-38°C, and react for 12 hours. End the reaction. The temperature of the material in the reaction kettle was lowered to 10-15° C., and filtered to obtain 412 kg of crude product of acryloyloxyethylbenzyldimethylammonium chloride. After filtering out the reaction mother liquid of the crude product of acryloyloxyethylbenzyldimethylammonium chloride, the reaction mother liquor is analyzed by gas chromatography, and dimethylaminoethyl (meth)acrylate and benzyl chloride are added to enter the next cycle.

[0027] Open the stirrer of 1000 liters washing kettle, under room temperature, drop into 600 kilograms of ethyl acetate and 412 kilograms...

Embodiment 2

[0029] The reaction mother liquor in embodiment 1 is sent in 1000 liters of reactors, add 200 kilograms of dimethylaminoethyl acrylate, 190 kilograms of benzyl chloride and 0.1 kilogram of potassium iodide, according to the processing method and steps of embodiment 1, prepare 370 kg of acryloyloxyethyl benzyl dimethyl ammonium chloride was obtained, the product yield was 98.4%, and its purity was analyzed to be 99.2%.

Embodiment 3

[0031] According to the processing method and steps of Example 1, 200 kilograms of dimethylaminoethyl acrylate and 0.3 kilogram of potassium iodide were replaced with 200 kilograms of dimethylaminoethyl methacrylate and 0.6 kilogram of tetraethylammonium iodide, to prepare 335 kg of methacryloyloxyethyl benzyl dimethyl ammonium chloride was obtained, the product yield was 93.1%, and its purity was analyzed to be 99.6%. The reaction mother liquor was recycled 6 times, and the average yield of methacryloyloxyethyl benzyl dimethyl ammonium chloride was 96.12%.

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PUM

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Abstract

The invention provides a method for cleanly producing high-purity (methyl) acryloyl ethoxy benzyldimethyl ammonium chloride. Methyl benzoate or ethyl benzoate is adopted as a reaction solvent, and iodides, such as lithium iodide, potassium iodide, tetramethyl-ammonium iodide, tetraethyl-ammonium iodide or tetrabutyl-ammonium iodide, and the like are adopted as a catalyst, and the reaction is carried out at 35-38 DEG C for 10-24 hours. The yield of one-path (methyl) acryloyl ethoxy benzyldimethyl ammonium chloride is between 93 percent and 95 percent, a rough product is washed for three times by ethylacetate, and the analytical purity of the (methyl) acryloyl ethoxy benzyldimethyl ammonium chloride is larger than 99 percent.

Description

technical field [0001] The invention relates to a production method of a quaternary ammonium salt type cationic monomer, in particular to a clean production method of high-purity (meth)acryloyloxyethylbenzyl dimethyl ammonium chloride. technical background [0002] Cationic polyacrylamide is a copolymer of polyacrylamide, used as a flocculant for sewage treatment. Copolymerization of acrylamide monomer and cationic monomer is a common method to obtain cationic polyacrylamide flocculant. Commonly used cationic monomers are dimethyl diallyl ammonium chloride (DMDAAC), acryloyloxyethyltrimethylammonium chloride (DAC), methacryloyloxyethyltrimethylammonium chloride (DMC ), acryloyloxyethylbenzyldimethylammonium chloride (DMAEA·BCQ), methacryloyloxyethylbenzyldimethylammonium chloride (DMAEA·MCQ). The cationic monomers described in the present invention are all quaternary ammonium salts containing unsaturated carbon-carbon double bonds, which are very easy to absorb moisture in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/63C07C209/12
Inventor 李善忠刘卫峰张田林
Owner HUAIHAI INST OF TECH
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