Nalco Chemical Company

Sophia L Wang

Glenn L Roof

George Richard Meyer

Beth W Porlier

Kim B Peyton

Kerry C Brinkman

Alan A Millard

This invention provides a composition and a method of using the composition for dispersing wax and improving the pour point of lubricating oils. The composition comprises an esterified styrene-maleic anhydride copolymer and an esterified alpha-olefin maleic anhydride copolymer.

Composition and method for lubricant wax dispersant and pour point improver

Rust of ferrous metal surfaces that are in contact with gasohol or alcohol fuels is inhibited by the addition of a corrosion inhibiting amount of the combination of (A) a substituted imidazoline and (B) an alkenyl succinimide of a mixture of alkylenepolyamines.

Corrosion inhibitor for alcohol and gasohol fuels

A solvent dewaxing process for dewaxing waxy lubricating oil with a dewaxing solvent and a dewaxing aid which comprises using as the dewaxing aid a styrene dialkyl maleate copolymer wherein the side chain groups contain from C.sub.16 -C.sub.24.sup.+ carbon atoms. These polymers are further characterized as having a molecular weight within the range of 10,000-150,000.

Styrene-dialkyl maleate copolymers as dewaxing agents

An improved process for reducing mercaptan (thiol) concentrations of sour petroleum distillates includes the treatment of these sour distillates with peroxy compounds, preferably tertiary butyl hydroxide and cumene hydroperoxide in the presence of oil-dispersible organic amine compounds such as quaternary ammonium hydroxide salts and alkalene polyamines. The preferred organic amine catalyst is Primene 81-R.

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Houston, TX, United States of America

Sophia L Wang