摘要:
A novel method for improving electrical insulating hydrocarbon. The electrical insulating substance is obtained by dehydrogenating aromatic hydrocarbons having two aromatic nuclei. The electrical insulating substance itself or a mixture of it with other electrical insulating oils is suitable for use in impregnation of electrical appliances.
摘要:
An electrical appliance impregnated with a curable impregnant composition comprising as the curable ingredient at least one aromatic olefin and/or diolefin having a plurality of condensed- or noncondensed-type aromatic rings.
摘要:
An improved electrical insulating oil and oil-filled electrical appliances impregnated therewith. The electrical insulating oil can be produced inexpensively but has excellent electrical characteristics and it comprises a fraction having boiling points in the range of 350.degree. to 450.degree. C. that is prepared by disproportionating diarylalkane or a hydrocarbon mixture mainly containing the same at temperatures in the range of 20.degree. to 500.degree. C. in the presence of a disproportionation catalyst, said diarylalkane having boiling points in the range of 260.degree. to 320.degree. C.
摘要:
An oil-filled capacitor which can be made small in size and has excellent electrical characteristics. The capacitor of the present invention is characterized in that it is made by impregnating a film-wound capacitor element with 1-phenyl-1-(benzylphenyl)ethane, at least a part of the dielectric material of said capacitor being made of a plastic film.
摘要:
A novel electrical insulating oil and oil-filled electrical appliances that are impregnated with the novel insulating oil. The electrical insulating oil is quite suitable for use in oil-filled electrical appliances in which insulating materials or dielectric materials made of plastics are employed. The electrical insulating oil comprises (a) at least one member of alkylbiphenyls and alkylnaphthalenes and (b) at least one member of monoolefins and diolefins each having two condensed or noncondensed aromatic nuclei.
摘要:
An improved electrical insulating oil and oil-filled electrical appliances impregnated therewith. The electrical insulating oil is quite suitable for use in oil-filled electrical appliances in which insulating materials or dielectric materials made of plastics are employed. The electrical insulating oil comprises (a) at least one member of diarylalkanes and (b) at least one member selected from the group of mono- and/or diolefins having two condensed or noncondensed aromatic nuclei.
摘要:
An electrical insulating oil composition which is characterized in that said insulating oil composition contains 5 to 300 ppm (as sulfur) of sulfur compounds and exerts excellent deterioration resistance when the insulating oil composition is fed through or used in contact with a substance made of lead or a lead alloy.
摘要:
A process for recovering alkyl sulfonic acid from a photosulfoxidation reaction mixture of an alkane comprising the steps of: separating a major portion of the unreacted alkane contained in said reaction mixture by settling; subjecting thus treated reaction mixture to steam-distillation to remove the remaining portion of the unreacted alkane together with the sulfur dioxide therefrom; subsequently separating the sulfuric acid without heating from the resulting mixture by settling, thereby recovering the alkyl sulfonic acids.