Title:
PROCESS AND APPARATUS FOR MAKING ULTRA-PURE DMSO
Document Type and Number:
WIPO Patent Application WO2000064868
Kind Code:
A8
Abstract:
One aspect of this invention relates to processes for solidifying dimethylsulfoxide including a step of partially solidifying a liquid phase including dimethylsulfoxide and one or more impurities, to form a mixture comprising solid dimethylsulfoxide and a liquid residue. In certain embodiments of the processes of the invention, ultra-high purity DMSO that exceeds the purity specifications for U.S.P. grade DMSO can be produced by employing solidification, fractional solidification and/or melt crystallization processes.
Inventors:
BLOOM CLAUDE A JR
ASHE CHARLES G
FERGUSON JOHN L
GIBBONS JOE P JR
OTTO KENNETH W
RODGER ALAN M
ASHE CHARLES G
FERGUSON JOHN L
GIBBONS JOE P JR
OTTO KENNETH W
RODGER ALAN M
Application Number:
PCT/US2000/010935
Publication Date:
March 15, 2001
Filing Date:
April 24, 2000
Export Citation:
Assignee:
GAYLORD CHEMICAL CORP (US)
International Classes:
C07C315/06; C07C317/04; (IPC1-7): C07C315/06
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