Claims
- 1. In a process for making a lubricating oil additive comprising:
- effecting an oxidation reduction reaction at between room temperature and 80.degree. C., between a tri- to hexavalent oxymolybdenum compound and at least one organophosphorus acid or acid precursor consisting of an olefin: P.sub.2 S.sub.5 reaction product or of an alcoholyzed olefin: P.sub.2 S.sub.5 reaction product wherein the olefin moiety contains from 3 to 30 carbon atoms;
- the improvement comprising the combination of steps of:
- employing said acid or acid precursor in a molar charge ratio with said oxymolybdenum compound of Mo:P of 1:1 to 1:2;
- in a mixture of an inert solvent with a polar, oxygen-containing, co-solvent selected from the group consisting of esters, ethers, alcohols, ketones, lactones, amides, lactams and mixtures thereof;
- using a ratio of polar cosolvent to solvent ranging from 1:10 to 10:1;
- removing the water of reaction formed:
- filtering; and,
- removing said solvent and cosolvent to recover said additive.
- 2. The process of claim 1, wherein said cosolvent is ethyl acetate, ethylene glycol dimethyl ether, or isopropanol.
- 3. The process of claim 1, wherein the oxymolybdenum compound is obtained by acidification of an ammonium or alkali metal molybdate.
- 4. The process of claim 1, wherein said inert solvent is heptane, hexane or cyclohexane.
- 5. The process of claim 1, wherein said alkyl groups are 2-ethylhexyl.
- 6. The process of claim 1, wherein said alkyl groups are isopropyl.
- 7. The process of claim 1, wherein the alkyl groups are a mixture of n-tetradecenyl and n-dodecyl groups.
- 8. The process of claim 1, wherein said precursor is obtained by reacting an olefin: P.sub.2 S.sub.5 reaction product of the formula:
- R".sub.2 P.sub.2 S.sub.3
- wherein
- R" is an alkenyl group derived from a linear or branched olefin having 4 to 40 carbon atoms;
- with an alcohol;
- to form said precursor which has the formula: ##STR6## wherein R' is an alkyl group having 3 to 30 carbon atoms;
- prior to reaction with said oxymolybdenum compound.
- 9. The process of claim 8, whein the R" group is n-tetradecenyl.
- 10. The process of claim 8, wherein the R" group is n-octadecenyl.
- 11. The process of claim 8, wherein R" is n-tetradecenyl and R' is derived from a mixture of n-dodecyl and n-tetradecyl alcohols.
- 12. The process of claim 8, wherein R" is n-tetradecenyl and R' is isopropyl.
CROSS-REFERENCE TO CO-PENDING APPLICATION
This application is a continuation-in-part of coassigned application Ser. No. 188,488, filed Sept. 18, 1980 and now abandoned.
US Referenced Citations (9)
Non-Patent Literature Citations (1)
Entry |
Hawley, G. G. (Editor), "The Condensed Chemical Dictionary", 9th Edition, p. 588, 1977. |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
188488 |
Sep 1980 |
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