Title:
実質的に無水の有機液体の精製法
Document Type and Number:
Japanese Patent JP4302201
Kind Code:
B2
Abstract:
Purification of a virtually anhydrous organic liquid to decrease its content of alkali metal, alkaline earth metal and other metal cations comprises contacting the liquid with one or more cation exchange resins in acidic or ammonium form. At least one of the resins is a sulphonic resin containing SO3H or SO3NH4 groups and based upon a polystyrene-divinylbenzene copolymer having 50-60 wt.% divinylbenzene content (without taking the sulphonic groups into account). The liquid may not be dimethylsulphoxide (DMSO) alone.
Inventors:
Annie Comalieu
Francis Umbro
Francis Umbro
Application Number:
JP13170698A
Publication Date:
July 22, 2009
Filing Date:
May 14, 1998
Export Citation:
Assignee:
Atofina S.A.
International Classes:
C07B63/00; B01J39/04; C07B63/02
Domestic Patent References:
| JP61171507A | ||||
| JP1148348A |
Attorney, Agent or Firm:
Yoshio Kawaguchi