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    • 5. 发明授权
    • Method for the preparation of insulating oil
    • 绝缘油的制备方法
    • US4008148A
    • 1977-02-15
    • US573575
    • 1975-04-30
    • Midori MasunagaYoshiki KohnoTadashi Ohmori
    • Midori MasunagaYoshiki KohnoTadashi Ohmori
    • C10M109/02C10G67/04C10G67/14C10N20/00C10N30/00C10N30/10C10N30/20C10N40/16C10N60/02H01B3/20H01G4/22C10G34/00
    • C10G67/04C10G2400/10C10G2400/12
    • This invention provides a method for the preparation of insulating oil having good oxidation stability, electric characteristics and resistance to copper corrosion which comprises subjecting a distillate (stock) within a temperature range from 250.degree. to 400.degree. C. in terms of the boiling point at atmospheric pressure to solvent refining to a desulfurization from 30 to 75% by weight to give a raffinate, said distillate having been obtained either by distillation at atmospheric pressure of a paraffin- or mixture-base crude oil and/or by distillation under reduced pressure of a residual oil from the atmospheric pressure distillation, subjecting said raffinate to hydrogenating refining to a desulfurization from 40 to 90% by weight and subjecting the refined product to solvent dewaxing, and if necessary, subsequently subjecting the dewaxed product to clay treatment to a sulfur content of the final product from 0.1 to 0.35% by weight.
    • 本发明提供一种具有良好的氧化稳定性,电特性和耐铜腐蚀性的绝缘油的制备方法,该方法包括使馏出物(原料)在250-400℃的温度范围内,以沸点 大气压至溶剂精炼至脱硫为30至75重量%,得到萃余液,所述馏出物是通过在石油或基于混合物的原油的常压下蒸馏和/或通过在减压下蒸馏得到的 来自大气压蒸馏的残余油,对所述残液进行精炼,将脱硫氢化为40〜90重量%,对精制物进行溶剂脱蜡,必要时,将脱蜡产物进行粘土处理,得到硫含量 的最终产物为0.1至0.35重量%。