John Lyle Ferguson
Engineering at Jefferson Davis Dr, Bogalusa, LA
License number
Louisiana PE.0016371
Issued Date
Jul 27, 1977
Expiration Date
Mar 31, 2011
Category
Civil Engineer
Type
Chemical Engineer; Environmental Engineer
Address
Address
1201 Jefferson Davis Dr, Bogalusa, LA 70427
Professional information
Process And Apparatus For Making Ultra-Pure Dmso
US Patent:
6414194, Jul 2, 2002
Filed:
Apr 24, 2000
Appl. No.:
09/557237
Inventors:
Charles G. Ashe - Carriere MS
John L. Ferguson - Bogalusa LA
Kenneth W. Otto - St. Pete Beach FL
Alan M. Rodger - Bogalusa LA
John L. Ferguson - Bogalusa LA
Kenneth W. Otto - St. Pete Beach FL
Alan M. Rodger - Bogalusa LA
Assignee:
Gaylord Chemical Corporation - Slidell LA
International Classification:
C07C31500
US Classification:
568 27
Abstract:
One aspect of this invention relates to processes for solidifying dimethylsufoxide including the steps of partially solidifying a liquid phase including dimethylsulfoxide and one or more impurities, to form a mixture comprising solid dimethylsulfoxide and a liquid residue, and substantially separating the solid dimethylsulfoxide from the liquid residue, wherein the liquid residue comprises liquid dimethylsulfoxide and at least a portion of the impurities, and wherein the liquid residue is not subsequently treated by any step of partial solidification. 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.