Production of transformer oil feed stocks from waxy crudes

Details Production of transformer oil feed stocks from waxy crudes Production of transformer oil feed stocks from waxy crudes

1977-02-16

1978-11-07

Levine, Herbert

Mineral oils: processes and products

Chemical conversion of hydrocarbons

With preliminary treatment of feed

208 14, C10G 4100

Patent

active

041244893

ABSTRACT:
Transformer oil feedstocks are produced by double solvent extracting a raw, untreated, light distillate fraction from a waxy crude oil to produce a second, wax-containing extract. The second extract oil is hydrotreated to mildly crack same, reduce the sulfur content and improve the viscosity oxidation and color stability thereof. This hydrotreated oil is then distilled to produce a transformer oil feedstock of relatively low wax content as a heart cut fraction having a 5 to 95 LV% boiling range between about 595.degree. to 750.degree. F. The transformer oil feedstock may then be dewaxed using any well known method such as solvent or catalytic dewaxing to obtain a low pour point transformer oil.

REFERENCES:
patent: 3627673 (1971-12-01), Sproule et al.
patent: 3732154 (1973-05-01), Mills et al.
patent: 3932267 (1976-01-01), Lewis et al.
patent: 4008148 (1977-02-01), Masunaga et al.

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