PRODUCTION OF WATER-SOLUBLE POLYSTYRENESULFONIC ACID

PURPOSE:To easily produce the titled compound having high purity and free from solvent and to reutilize the reaction solvent, by sulfonating a polystyrene in a halogenated hydrocarbon solvent and removing the solvent from the reaction product using a specific flash evaporation process. CONSTITUTION:...

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Bibliographic Details
Main Authors MIKUCHI FUMIHIRO, TERAO TOSHIMI, NAGANO KATSUMASA, IDE MASAYUKI
Format Patent
LanguageEnglish
Published 05.08.1988
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PURPOSE:To easily produce the titled compound having high purity and free from solvent and to reutilize the reaction solvent, by sulfonating a polystyrene in a halogenated hydrocarbon solvent and removing the solvent from the reaction product using a specific flash evaporation process. CONSTITUTION:A polystyrene having an average molecular weight of 200-50,000 is sulfonated in a halogenated hydrocarbon (preferably methylene dichloride, etc.). The obtained sulfonation reaction product is heated in a closed pressure vessel at a heating rate of <=50 deg.C/sec to a temperature higher than the boiling point of the solvent by 5-50 deg.C. The heated reaction product is ejected into an evacuated system having pressure of <=400mmHg at a rate of 20-200m/sec to effect the flash evaporation of the halogenated hydrocarbon solvent and obtain the objective compound. The sulfonation agent is preferably gaseous SO3, etc., diluted with N2 gas, etc.
Bibliography:Application Number: JP19870019962