Process for removing constituents from a mixture
US4154674A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1977 |
| Grant date | May 15, 1979 |
| Priority date | — |
| Expiry date | Jul 21, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/288
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present process causes selective removal of a predetermined anionic or cationic constituent from a mixture containing a plurality of constituents by contacting the mixture with an extraction agent so as to remove the desired constituent from the mixture, and if desired eluting the constituent from the extraction agent, thus recovering the extracting agent for further use. The extraction agent has the general formula EQU RY [(XO).sub.n --X] YR' wherein X is a group (CH.sub.2 --CH.sub.2) or (CH.sub.2 --CHR.sup.1) where R.sup.1 is alkyl, aryl or a non-interfering functional substituent, n is an integer between 2 and 100 which defines the molecular weight of the glycol or glycol derivative, and wherein R and R', which may be identical or different, each designates: PA1 (a) R and R' are hydrocarbon groups selected from alkyl, aryl and aralkyl; PA1 (b) R and R' are as defined in (a), one at least of R and R' being a group ##STR1## WHEREIN R.sub.a is a non-interfering substitutent; R.sub.b is --H, --OH, --COR.sub.d, CR.sub.d NOH, --NO.sub.2 m --COOH, halogen or a non-interfering substituent, PA1 R.sub.c is --OH or --SH, PA1 R.sub.d is --H, alkyl, aralkyl PA1 (c) R and R' are [X'], X' …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.