Exxon Research and Engineering Company

Robert Tirtiaux

Marcel Prillieux

Marcel Robert

Alain Louis Lenack

Pierre Dominique Marin

Robert M Laurent

Andre Osselet

Purification of sulphuric acid rich sulphonic acids particularly those prepared by oleum sulphonation, by water washing, treatment with an olefine and final heat treatment.

Sulphonic acids and sulphonates

Improved dispersion of silicone antifoams in lubricating compositions is achieved by dissolving the antifoam in an alkyl aromatic hydrocarbon of molecular weight below 330 and with a flash point above 140.degree. C.

Antifoam additives

In producing basic Calcium Sulphonate by carbonating mixtures of sulphonic acids, calcium hydroxide, alcohols and toluene the use of a narrowly defined temperature profile during carbonation enables product of improved oil solubility and viscosity to be obtained as well as leading to improved filterability.

Calcium sulphonate process

Overbased alkaline earth metal sulphonates obtained from monoalkyl orthoxylene or toluene have been found to have reduced foaming tendency as compared with corresponding benzene based sulphonates.

Overbased sulphonates

Surface active agents for oil in water emulsions and oil recovery comprising salts of alkaryl sulphonic acids and organic bases containing at least one --(C.sub.2 H.sub.4 O).sub.n H where n is greater than 1.

Lubricating oil containing a surface active agent

Alkyl aromatics are prepared by alkylation with a mixture of straight and branched chain olefines. The alkylates may be sulphonated to yield low viscosity sulphonate emulsifiers and are raw materials for producing low foaming overbased sulphonate lubricant additives.

Alkylates and sulphonic acids and sulphonates produced therefrom

The development of color of a concentrate of alkarylsulphonic acids is reduced by adding to and dissolving in the freshly prepared concentrate up to 5% of its weight of an organic compound having at least one ether group therein, the partial vapor pressure of the compound thus dissolved in the concentrate being negligible at the temperatures at which the concentrate is stored or transported. Examples of suitable organic compounds are aliphatic or phenolic monoethers, e.g. diethylene glycol.

Alkylaryl sulphonic acids

Surface-active agent

Oligomerizing propylene using a Friedel Crafts catalyst at a temperature in the range -10.degree. to 80.degree. C and hydrogenating the oligomer so obtained to produce oils useful as hydraulic fluids.

Hydrogenated olefine oligomers

Blends of paraffinic oils and hydrogenated polycyclopentadiene or polymethylcyclopentadiene.

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Mont Saint Aignan, France

Robert Tirtiaux