Method of removing polynuclear aromatic compounds by adsorption with coconut charcoal
US4026917A · kind A · utility
3Cited by
0References
8Claims
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Assignee
Inventors
Key dates
| Filing date | Feb 11, 1975 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Feb 11, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/56
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Polynuclear aromatic compounds are irreversibly adsorbed by coconut charcoal and are separated from desired constituents by treatment in a coconut charcoal column. This invention is particularly valuable in providing a method suitable for large scale use for removing dioxins and other undesirable polynuclear aromatic hydrocarbons which are found as impurities in small but highly toxic amounts in industrial compounds and herbicides such as 2,4,5-T, 2,4-D and derivatives thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.