Process for producing lubricating oils and white oils

Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion

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208 14, 208 18, 208 89, 208 97, 208111, 208112, 208143, C10G 6512

Patent

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043258042

ABSTRACT:
The preparation of high quality, e.g., high viscosity index, base lubricating oils and white oils, particularly food grade white mineral oils, of suitable viscosity in high yield from a mineral oil distillate of suitable lubricating oil viscosity comprises contacting the distillate with hydrogen in four catalytic stages. The first reaction stage employs hydrocracking conditions. Subsequent reaction stages employ hydrogenation conditions. The second reaction stage, preferably employs a sulfur-resistant hydrogenation catalyst and produces a product suitable as a high quality lubricating oil base stock. The third reaction stage preferably employs a sulfur-resistant hydrogenation catalyst to obtain further aromatic saturation. The final stage employs a selective hydrogenation catalyst, optionally activated with a halogen, and produces a product suitable as a white oil, preferably a food grade white oil.

REFERENCES:
patent: 3459656 (1969-08-01), Rausch
patent: 3642610 (1972-02-01), Divijak et al.
patent: 4183801 (1980-01-01), Breuker et al.
patent: 4238316 (1980-12-01), Mooi et al.
patent: 4263127 (1981-04-01), Rausch et al.

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