Patent ID: 9102600
Filing Date: 2015-08-11
Classification: B01D,C07C

Abstract:
1. A method of purifying dimethyl sulfoxide comprising: a. providing a first dimethyl sulfoxide composition having impurities; b. freezing a portion of the first dimethyl sulfoxide composition on a first surface to form a second dimethyl sulfoxide composition having higher dimethyl sulfoxide purity than the first dimethyl sulfoxide composition; c. separating the second dimethyl sulfoxide composition from the first dimethyl sulfoxide composition; d. mechanically breaking the second dimethyl sulfoxide composition at the first surface; e. removing the second dimethyl sulfoxide composition from the first surface thereby creating a clean portion of the first surface; f. continuously contacting the clean portion of the first surface with the first dimethyl sulfoxide composition; and g. melting a portion of the second dimethyl sulfoxide composition; h. wherein the freezing of the portion of the first dimethyl sulfoxide composition, the separating of the second dimethyl sulfoxide composition from the first dimethyl sulfoxide composition, and the melting of the portion of the second dimethyl sulfoxide composition happen simultaneously; and i. wherein the first surface is a rotating surface.