Electric insulating oil compositions

Details Electric insulating oil compositions Electric insulating oil compositions

1978-04-06

1979-11-20

Levine, Herbert

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

174 25C, 208 14, 208 71, 252 63, 252 632, C10G 3708, H01B 322, H01B 700

Patent

active

041752783

ABSTRACT:
The present invention provides novel electric insulating oil compositions and a process for preparing the same. The electric insulating compositions of the invention comprise distillates within a boiling range in terms of normal pressure between 265.degree. C. and 360.degree. C. obtained by processing a hydrocarbon mixture from cracking of petroleum hydrocarbons at a temperature of 700.degree. C. or higher principally composed of components with a boiling range between 75.degree. C. and 198.degree. C., said components mainly containing monocyclic aromatics and comprising aromatic olefins of said boiling range, in liquid phase in the presence of an acid catalyst under such conditions that the reaction temperature is from 0.degree. C. to 200.degree. C., the liquid residence time is from 0.1 hour to 5 hours and the concentration of aromatic olefins in the reaction system is 10% by weight or below.

REFERENCES:
patent: 3450968 (1969-06-01), Cox
patent: 3586752 (1971-06-01), Mills et al.
patent: 3794579 (1974-02-01), Enomoto et al.
patent: 3951780 (1976-04-01), Woo et al.

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