Dechlorinated benzyltoluene/dibenzyltoluene oligomer dielectric liquids
US5202514A · kind A · utility
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8Claims
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Key dates
| Filing date | Dec 28, 1990 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Dec 28, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/52
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Benzyltoluene/dibenzyltoluene oligomers essentially devoid of contaminating amounts of chlorine values, well adapted as dielectric liquids, are prepared by (a) condensing benzyl chloride with toluene or with lower benzyltoluene oligomers in the presence of a catalytically effective amount of ferric chloride, and then (b) directly dechlorinating the crude product of condensation, e.g., by contacting same with sodium methylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.