エチレンサルファイト及びその製造方法

Title:

エチレンサルファイト及びその製造方法

Document Type and Number:

Japanese Patent JP4432311

Kind Code:

B2

Abstract:

To provide purified ethylene sulfite which is stable when used as the component of an electrolysis solution.

The production method of the purified ethylene sulfite comprises a step of purifying crude ethylene sulfite, which is obtained by the reaction of ethylene glycol with sulfinyl chloride, through purification processes including precision distillation. In this case, at least one purification process selected from the group consisting of washing with basic water, total reflux dehydration, precision distillation and adsorption process is carried out before or after the precision distillation concerned. In addition, the purified ethylene sulfite obtained by the above processes contains chloroethanol in an amount of at most 1,000 ppm.

Inventors:

Minoru Kato
Sanne Hokko
Minoru Furuta

Application Number:

JP2002238775A

Publication Date:

March 17, 2010

Filing Date:

August 20, 2002

Export Citation:

Click for automatic bibliography generation Help

Assignee:

Mitsubishi Chemical Corporation

International Classes:

C07D327/10; H01M10/05; H01M10/0567

Domestic Patent References:

JP62222575A
JP5074485A
JP11162511A
JP11307121A
JP2000229894A
JP11106358A
JP5331138A

Foreign References:

WO1999016144A1
DE1217970B
DE1223397B

Other References:

WRODNIGG, G.H., et al.,J. Electrochem. Soc.,146(2),pp.470-472 (1999)
WINTER, M., et al.,J. Electrochem. Soc.,147(7),pp.2427-2431 (2000)
鄭淳基ら,電気化学会第68回大会講演要旨集,p.217 (要旨番号1L21) (2001)
MAJIMA, R., SIMANUKI, H.,Proceedings of the Imperial Academy,2(10),pp.544-546 (1926)

Attorney, Agent or Firm:

Hajime Tsukuni
Koshiro Tsukuda
Fusayuki Saito
Satoko Ito
Hasegawa Soji

Previous Patent: ドット記録領域と空白領域とで副走査送りを切り換える印刷

Next Patent: 燃料電池装置