C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
253/95
C10M 159/22 (2006.01)
Patent
CA 1054135
ABSTRACT OF THE DISCLOSURE A lubricating oil composition containing sulfurized calcium alkylphenolate detergent dispersant of superior resistance to oxidation prepared by 1). reacting at a tempera- ture between 200 and 425°F. alkylphenol with a first addition of calcium alkoxyalkoxide to form a calcium alkylphenolate containing first reaction mixture utilizing between about 45 and 90 wt. % of the stoichiometric amount required to convert the alkylphenol to calcium alkylphenolate, 2). contacting the calcium alkylphenolate first reaction mixture with sulfur at a temperature between about 440 and 460°F. in the presence of between about 13 and 20 wt. % of a hydrocarbon lubricating oil based on step 2 second reaction mixture, and 3). contact- ing the second reaction mixture with a second addition of calcium alkoxyalkoxide at a temperature between about 350 and 425°F., said first and second addition totalling between about 100 and 120% of the stoichiometric amount of calcium alkoxy- alkoxide to form said calcium alkylphenolate, said steps 1 and 3 being advantageously conducted while blowing their res- pective reaction mixtures with inert gas, step 2 being con- ducted while sequentially blowing step 2 reaction mixture with inert gas, carbon dioxide and inert gas. -I-
232072
Chafetz Harry
Foucher Walter D. (jr.)
Sung Rodney L.
Zoleski Benjamin H.
Na
Texaco Development Corporation
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