ELECTRICALLY INSULATING FLUID AND PROCESS FOR PREPARING THE SAME

The invention relates to a process for preparing an electrically insulating fluid intended for mixed solid/liquid insulations in electrical equipments. According to the invention, the process consists in thermally treating raw vegetable oil containing 5%, at the most, fatty acid esters, such as lino...

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Main Authors LINGVAY IOSIF, ŞERBAN FLORENTINA FĂNICA, STANOI VALERICA, OPRINA GABRIELA, VOINA ANDREEA, PICA ALEXANDRA, UNGUREANU LIVIA-CARMEN
Format Patent
LanguageEnglish
Romanian
Published 30.03.2021
Subjects
CHEMISTRY
FUELS
LUBRICANTS
LUBRICATING COMPOSITIONS
METALLURGY
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
TECHNICAL GASES CONTAINING CARBON MONOXIDE
USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Summary:The invention relates to a process for preparing an electrically insulating fluid intended for mixed solid/liquid insulations in electrical equipments. According to the invention, the process consists in thermally treating raw vegetable oil containing 5%, at the most, fatty acid esters, such as linoleic acid or linolenic acid, and at least 90% monounsaturated fatty acid esters, such as oleic acid, and saturated fatty acid esters, such as stearic acid, in a ratio of 5:1, at 125...135°C, for 3...5 h, followed by a primary dehydration on silica gel, up to a moisture content of 50 ppm, at the most, after which 0.5...0.9% butanol is added, the mixture is thermally treated at a temperature of 115...125°C, for 4...6 h, and at the ambient temperature, with silica gel, up to a moisture content of 30 ppm, at the most, to finally obtain, after filtration, a fluid having a dielectric rigidity of at least 45 kV/cm, a flammability point of at least 250°C and fast biodegradability in natural conditions.
Bibliography:Application Number: RO20170000378