Process for decolorizing lubricating oil additives

Details Process for decolorizing lubricating oil additives Process for decolorizing lubricating oil additives

1978-04-17

1980-07-22

Rotman, Alan L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544347, 546182, 546255, 568 23, 568 40, C07D47316, C07D40304, C07D21510

Patent

active

042140838

ABSTRACT:
Lubricating oil additives, including the calcium salts of sulfurized alkylphenols and dispersants consisting of the reaction products of halogenated polyalkylenes and heterocyclic amines, are substantially decolorized by treatment with small amounts of alkali metal hydrides in a polar solvent at 20.degree. to 120.degree. C. Color improvement is obtained at concentrations ranging from 1 to 75 parts of an alkali metal hydride per 1000 parts of additive.

REFERENCES:
patent: 3969235 (1976-07-01), Sung et al.
patent: 4100086 (1978-07-01), Larkin et al.

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