Method for separating and recovering an acid
US5300228A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1992 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Jun 5, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2327/18
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for separating and recovering an acid, which comprises contacting to one side of a diffusion dialysis membrane an acid solution containing an acid having an acid radical with a formula weight of at most 200 and impurities and to the other side of the membrane water or a dilute acid solution, to separate and recover the acid in the solution, wherein the diffusion dialysis membrane comprises a cation exchange membrane having certain specific properties or comprises a main layer of an anion exchanger and a surface layer of the cation exchange membrane having certain specific properties formed on the main layer at the side of which is contact with the acid solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.