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.
申请公布号
WO0064868(A8)
申请公布日期
2001.03.15
申请号
WO2000US10935
申请日期
2000.04.24
申请人
GAYLORD CHEMICAL CORPORATION
发明人
BLOOM, CLAUDE, A., JR.;ASHE, CHARLES, G.;FERGUSON, JOHN, L.;GIBBONS, JOE, P., JR.;OTTO, KENNETH, W.;RODGER, ALAN, M.