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Patent Searching and Data


Title:
PHENOLIC ANTIOXIDANT COMPOSITION AND PREPARATION THEREOF
Document Type and Number:
Japanese Patent JPH03223396
Kind Code:
A
Abstract:

PURPOSE: To obtain a partially sulfurized liquid hindered phenol product low in copper corrosiveness and suitable as an antioxidant for lubricating oils by reacting a liquid mixture of phenols mainly made up of a hindered phenol(s) with a specified amount of a sulfur chloride.

CONSTITUTION: A liquid phenol mixture made up of one or more reactive hindered phenols (e.g. 2,6-di-t-butylphenol and 2,4-di-tert-butylphenol) in an amount of at least about 50 wt.% is prepared. Then the mixture is reacted with sulfur chloride in a ratio of 0.3 to 0.7 gram atom per mol of the reactive phenols to recover a liquid product thereby obtaining a partially sulfurized liquid hindered phenol product. The obtained product is allowed to be contained as an antioxidant in an amount of 0.05 to 5 wt.% in an oil having a lubricating oil viscosity thereby enabling a lubricating oil for decreasing the formation of sludge for crank chambers to be produced.


Inventors:
Lam, William Y.
Liesen, Gregory P.
Application Number:
JP1990000323385
Publication Date:
October 02, 1991
Filing Date:
November 28, 1990
Export Citation:
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Assignee:
ETHYL PETROLEUM ADDITIVES INC
International Classes:
C10L1/183; C09K15/14; C10L1/14; C10L1/24; C10L10/08; C10M135/02; C10M135/30; C10M159/12; C10L1/18; C10N30/10; C10N30/12; C10N60/10; C10N70/00; (IPC1-7): C09K15/14; C10L1/18; C10M135/02; C10M159/12; C10N30/10; C10N30/12; C10N60/10; C10N70/00