A method for producing high-purity sodium methallyl sulfonate

By employing a method of high-temperature initiation of low-temperature reaction, dual dehydration, and modified activated carbon treatment, the problems of solvent toxicity and resource waste in the synthesis of sodium methyl propylene sulfonate were solved, achieving high yield of high-purity products and environmentally friendly production.

CN122301740APending Publication Date: 2026-06-30SHANDONG SONGCHUAN NEW MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG SONGCHUAN NEW MATERIALS CO LTD
Filing Date
2026-06-01
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing methods for synthesizing sodium methyl methacrylate suffer from problems such as high solvent toxicity, darkening of the reaction solution, impact on product quality, and waste of resources.

Method used

A temperature control strategy of high-temperature initiation and low-temperature reaction is adopted, combined with a specific molar ratio of methylchloropropylene and sodium sulfite to achieve dual dehydration and solid-liquid separation. Modified activated carbon is used to treat the exhaust gas and condensate, thereby realizing water resource recycling and impurity removal.

Benefits of technology

It improved the yield of sodium methyl propylene sulfonate, reduced the generation of impurities, ensured product purity and environmental friendliness in production, reduced the burden of wastewater treatment, and improved the utilization rate of raw materials.

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Abstract

This application discloses a method for producing high-purity sodium methylpropene sulfonate, belonging to the technical field of sodium methylpropene sulfonate preparation. The method includes: mixing sodium sulfite with recycled water to obtain a sodium sulfite solution; adding methylchloropropene dropwise to the sodium sulfite solution, heating to 65-75℃ to initiate a reaction, controlling the temperature at 45-50℃ for 0.5-1.5 hours, allowing the mixture to settle, and condensing and recovering the tail gas; subjecting the reaction solution to sequential crude dehydration and refined dehydration, condensing and recovering the generated water vapor; performing a first solid-liquid separation on the dehydrated material, crystallizing the mother liquor, and then performing a second solid-liquid separation, returning the crystallized mother liquor to the dehydration process; and sequentially rinsing and drying the crude sodium methylpropene sulfonate to obtain sodium methylpropene sulfonate. This production method achieves efficient recovery and utilization of water resources and materials, ensuring high purity of sodium methylpropene sulfonate while also considering energy conservation, environmental protection, and economic efficiency in the production process.
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Citation Information

Patent Citations

  • Method for preparing methylpropene sodium sulfonate

    CN101492399A

  • Method for synthesizing sodium methyl allylsulfonate

    CN101805275A