Mineral oils: processes and products – Refining
Patent
1976-06-08
1978-05-23
Crasanakis, George
Mineral oils: processes and products
Refining
208288, 208295, 208296, 208297, 208299, C10G 2904, C10G 2910, C10G 2916
Patent
active
040909530
ABSTRACT:
An improved process for preparing a stabilized lubricating oil resistant to oxidation and sludge formation upon exposure to a highly oxidative environment, such as when metals are present and an overbased component is present in the lubricating oil, is provided. In the present process wherein a lubricating oil stock to be upgraded is contacted with elemental sulfur in the presence of a catalyst material selected from the group consisting of alumina, aluminosilicate, a metal of Groups II-A, II-B, VI-B or VIII of the Periodic Table of Elements, an oxide of a metal of Groups II-A, II-B, VI-B or VIII, a sulfide of a metal of Groups II-A, II-B, VI-B or VIII, clay, silica, silica combined with an oxide of a metal of Groups II-A, III-A, IV-B or V-B, and combinations thereof, at relatively low temperatures of from about 150.degree. to about 225.degree. C, an improvement is provided which comprises conducting said contacting in a flow reactor or under conditions comparable to those existing in a flow reactor at a liquid hourly space velocity of from about 0.5 hr.sup.-1 to about 20 hr.sup.-1 whereby the amount of elemental sulfur required to provide a stabilized lubricating oil stock is significantly lower than when a batch reactor is utilized, thus facilitating subsequent removal of excess unreacted sulfur.
REFERENCES:
patent: 1795278 (1931-03-01), Fischer
patent: 2854399 (1958-09-01), Weller
patent: 2985586 (1961-05-01), Willson et al.
patent: 3904511 (1975-09-01), Heiba et al.
patent: 3917566 (1975-11-01), Scott et al.
Audeh Costandi A.
Bridger Robert F.
Heiba El-Ahmadi I.
Barclay Raymond W.
Crasanakis George
Huggett Charles A.
Mobil Oil Corporation
Santini Dennis P.
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