Refined ethylene sulfite

Refined ethylene sulfite

Refined ethylene sulfite exhibits excellent storage stability when used as a constituent of an electrolyte. Ethylene sulfite is formed by a step of reacting ethylene glycol and thionyl chloride to producing raw ethylene sulfite, a rectifying step for rectifying the raw ethylene sulfite, and a refini...

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Bibliographische Detailangaben
Hauptverfasser: KOTATO MINORU, KATO TOSHIMITSU, MINE NORIOKI
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
CHEMISTRY
ELECTRICITY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:Refined ethylene sulfite exhibits excellent storage stability when used as a constituent of an electrolyte. Ethylene sulfite is formed by a step of reacting ethylene glycol and thionyl chloride to producing raw ethylene sulfite, a rectifying step for rectifying the raw ethylene sulfite, and a refining process for refining the raw ethylene sulfite or the rectified ethylene sulfite conducted before or after the rectifying step. The refining process is at least one process selected from the group consisting of a washing process, a dehydration process by total reflux distillation, a second rectifying process, and an absorbing process. Refined ethylene sulfite contains chloroethanol in an amount of not more than 1000 ppm.