E.i. Dupont De Nemours and Company

Conoco Inc.

Continental Oil Company

Kaye L Motz

Francisco Jose Freire

Eileen G Edwards

Jon Lee Howell

Robert J Statz

Kang Yang

Paul H Washecheck

William C Ziegenhain

James D Reedy

Allan J Lundeen

James E Yates

Ronald L Poe

Craig T Barker

Roger A Latham

A process for manufacturing high purity anhydrous hydrogen fluoride (HF) having low levels of oxidizable impurities by electrolytically oxidizing the impurities. Specifically, trivalent arsenic impurity in the anhydrous hydrogen fluoride is oxidized to a non-volatile pentavalent arsenic compound. The resultant solution is distilled to recover high purity anhydrous hydrogen fluoride with low levels of arsenic impurity.

Process for purifying hydrogen fluoride

A process for manufacturing high purity anhydrous hydrogen fluoride (HF) having low levels of oxidizable impurities by electrolytically oxidizing the impurities. Specifically, trivalent arsenic impurity in the anhydrous hydrogen fluoride is oxidized to a non-volatile pentavalent arsenic compound. The resultant mixture is distilled to recover high purity anhydrous hydrogen fluoride with low levels of arsenic impurity.

A low pour point crude oil composition is prepared by incorporating in a waxy crude oil an effective pour point depressant amount of an oil soluble ethylene-acryonitrile copolymer or terpolymer. The copolymer or terpolymer is usually added as a solution. In one aspect the invention relates to the pipeline transportation of the low pour crude oil composition.

Low pour crude oil compositions

Internal olefins are subjected to metathesis closely coupled after an isomerization reaction to obtain desired molecular weight range linear olefins. Specific process steps and separation conditions are necessary to obtain the desired linear olefins.

Process for the preparation of linear olefins from triethylaluminum and

An improvement is disclosed in the method of recovering hydrocarbons from a subterranean formation by use of an aqueous mixture containing an alkali metal hydrocarbon sulfonate and a solubilizing agent (e.g. isobutanol). Briefly, the improvement comprises using as the sulfonate an alkali metal C.sub.20 -C.sub.24 alkane sulfonate.

Waterflood method

An improved method of preparing an aldehyde by passing alcohol and air through a reactor containing a silver catalyst is disclosed. Briefly, the improvment comprises passing the alcohol and air through a zone, packed with silver catalyst, maintained at subreaction temperature prior to passing the reactants through the reaction zone. In a preferred embodiment, the reactants, after leaving the reaction zone, are passed through a zone containing inert material and maintained at a subreaction temperature.

Preparation of aldehydes from alcohols

The use of a condensation reaction product of (1) meta-cresol, para-cresol or a mixture of meta and para cresols, and (2) an aldehyde defined by R-CHO wherein R is hydrogen or an alkyl group having at least 1 carbon atom as an antioxidant in organic compositions.

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Ponca City, OK, United States of America

Kaye L Motz