Membrane separation of ionic liquid solutions
US9120834B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2014 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Oct 29, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D71/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A membrane separation process using a highly fluorinated polymer membrane that selectively permeates water of an aqueous ionic liquid solution to provide dry ionic liquid. Preferably the polymer is a polymer that includes polymerized perfluoro-2,2-dimethyl-1,3-dioxole (PDD). The process is also capable of removing small molecular compounds such as organic solvents that can be present in the solution. This membrane separation process is suitable for drying the aqueous ionic liquid byproduct from precipitating solutions of biomass dissolved in ionic liquid, and is thus instrumental to providing usable lignocellulosic products for energy consumption and other industrial uses in an environmentally benign manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.