The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1988
Filed:
Feb. 05, 1985
Atsushi Sato, Tokyo, JP;
Yoshikazu Murai, Yokohama, JP;
Tatsuo Yamaguchi, Hino, JP;
Kanji Mochizuki, Yokohama, JP;
Kunio Sugisawa, Yokohama, JP;
Nippon Petrochemicals Company, Limited, Tokyo, JP;
Abstract
A process for preparing an electrical insulating oil comprising a reaction product having a boiling range of higher than 260.degree. C. obtained by treating a hydrocarbn feed at a reaction temperature in the range of 0.degree. to 300.degree. C. in liquid phase in the presence of an acid catalyst, said hydrocarbon feed comprising a distillate from a thermal-cracked oil obtained in a thermal cracking process for thermally cracking a petrolic heavy residual oil at a temperature not lower than 400.degree. C. and not exceeding 700.degree. C., said distillate consisting mainly of hydrocarbons boiling in the range of 120.degree. to 290.degree. C. and said distillate containing at least 30 weight percent of paraffins and at least 10 weight percent of aliphatic olefins, and separating said reaction product from the resulting mixture containing at least said reaction product and unreacted hydrocarbons.