Ethyl Corporation

Marshall B Nelson

Thomas J Dileo

Matthew J Lynch

Ronny W Lin

Bruce C Peters

R Woodrow Wilson, Jr

Alfred P Anderson

Alpha-olefin is prepared from internal and/or vinylidene olefin by reacting the internal and/or vinylidene olefin with ethylene in the presence of a catalyst consisting essentially of Re.sub.2 O.sub.7 and B.sub.2 O.sub.3 on Al.sub.2 O.sub.3.

Preparation of alpha-olefin by ethenolysis

Unsaturated .alpha.-olefin oligomers are topped to remove monomer and dimer and then distilled to remove a trimer fraction leaving a residue of tetramer, pentamer and higher oligomers. The trimer fraction is hydrogenated to form saturated .alpha.-olefin oligomer suitable for use as a lubricant.

Olefin oligomer synlube process

Synlubes having a consistently low pour point are made by feeding a promoter (e.g. water, alcohol) at a controlled rate over an extended time period to an .alpha.-olefin (e.g. 1-decene) in contact with boron trifluoride.

C.sub.8-14 .alpha.-olefins are oligomerized to a oligomer mixture containing a high content of tetramer by feeding the .alpha.-olefin to a reaction vessel at a controlled rate over an extended period and in the presence of BF.sub.3 and a promoter such as an alcohol.

Synlube process

An improved process for the preparation of O,O-dialkyl phosphorochloridothioates in which distillation to recover substantially pure product is carried out in presence of a solubilizing or suspending agent, for example, liquid hydrocarbons, particularly aromatics having at least 10 carbon atoms which have good sulfur solubility, higher boiling point than the product and are inexpensive; specifically, naphthalenes are useful.

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Baton Rouge, LA, United States of America

Marshall B Nelson