(19)
(11)
EP 0 799 085 A1
(12)
(43)
Date of publication:
08.10.1997
Bulletin 1997/41
(21)
Application number:
95943606.0
(22)
Date of filing:
28.11.1995
(51)
International Patent Classification (IPC):
B01D
53/
52
( . )
(86)
International application number:
PCT/US1995/015393
(87)
International publication number:
WO 1996/019280
(
27.06.1996
Gazette 1996/29)
(84)
Designated Contracting States:
DE FR GB IT NL
(30)
Priority:
21.12.1994
US 19940360890
(71)
Applicant:
THE DOW CHEMICAL COMPANY
Midland, Michigan 48640 (US)
(72)
Inventors:
ALLEN, M., C.
Columbia, SC 29209 (US)
BEDELL, S., A.
Lake Jackson, TX 77566 (US)
(74)
Representative:
Burford, Anthony Frederick
W.H. Beck, Greener & Co. 7 Stone Buildings Lincoln's Inn
London WC2A 3SZ
London WC2A 3SZ (GB)
(54)
H 2S ABSORPTION WITH SUBSEQUENT OXALATE REMOVAL