Process for the separation of esters
US4521612A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1984 |
| Grant date | Jun 4, 1985 |
| Priority date | — |
| Expiry date | Oct 10, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the selective separation of esters of the general formula II EQU A--COOR.sup.1 II from mixtures containing the cyclopropane carboxylic acid esters of the general formula I ##STR1## in addition to the said esters of the general formula II by reacting the said mixture with an amine of the general formula III ##STR2## when removing the acid amides formed from the esters of the general formula II by washing the mixture with water of removing the esters of the general formula I by distillation. The compounds of the general formula I are the intermediates of herbicides. The requested purity of the herbicides can be achieved if pure intermediates are used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.