Purification of dichloroethylene compound
US4137421A · kind A · utility
1Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1978 |
| Grant date | Jan 30, 1979 |
| Priority date | — |
| Expiry date | Feb 21, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C37/84
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Impure 1,1-dichloro-2,2-bis(4-hydroxyphenyl)ethylene can be purified by heating the latter either with phenol alone or with a mixture of methylene chloride and phenol, allowing the heated mixture to cool until crystallization occurs and removing the above-identified purified dichloroethylene compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.