DMSO purification
US9102600B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2013 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Dec 20, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D9/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Methods and apparatus for purifying DMSO are disclosed including a method of purifying DMSO involving providing a first DMSO composition having impurities; freezing a portion of the first DMSO composition on a first surface to form a second DMSO composition having higher DMSO purity than the first DMSO composition such that a third DMSO composition remains from the unfrozen portion of the first DMSO composition; separating the second DMSO composition from the third DMSO composition; and melting a portion of the second DMSO composition. The freezing of the portion of the first DMSO composition, the separating of the second DMSO composition from the third DMSO composition, and the melting of the portion of the second DMSO composition may happen simultaneously. DMSO purification apparatus employing such methods and other methods are also taught.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.