METHOD OF MANUFACTURING ION-EXCHANGE MEMBRANES WITH SULFONIC-ACID GROUPS BASED ON CARBONFLUORIDE POLYMERS

FIELD: ion-exchange membranes. SUBSTANCE: invention focuses on preparing fluorine- containing copolymer with predetermined quality (equivalent weight less than 1000 g/mol) suitable to manufacture ion-exchange membranes with conductivity high enough for electrolysis processes (electrodialysis) Copoly...

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Bibliographische Detailangaben
Hauptverfasser:	BUDTOV V.P, MORGUNOV N.N, TIKHONOV E.N
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	FIELD: ion-exchange membranes. SUBSTANCE: invention focuses on preparing fluorine- containing copolymer with predetermined quality (equivalent weight less than 1000 g/mol) suitable to manufacture ion-exchange membranes with conductivity high enough for electrolysis processes (electrodialysis) Copolymer is prepared through copolymerization of tetrafluoroethylene with 3,6-dioxaperfluoro-(4-methyl-7- octene-sulfonyl fluoride "in bulk" at 0-20 C in presence of free- radical initiator and with periodically replenishing reaction mixture with tetrafluoroethylene. EFFECT: achieved required equivalent weight of copolymer. Предлагаемое изобретение относится к получению ионообменных мембран на основе фторуглеродных полимеров с функциональными сульфонилфторидными группами, обладающих достаточно высокой электропроводностью в процессах электролиза (электродиализа) водных растворов электролитов. Задача изобретения - получение фторсополимера с заданным свойством (эквивалентная масса