Bp Chemicals Limited

The British Petroleum Company, P.l.c.

Philip K Hodgson

Nevin John Stewart

Julie A McShea

Martin Philip Atkins

John R Blackborow

Brian Ellis

Neil Andrew Cooley

John Paul McNally

James Graham Bonner

John G Dolden

Leslie Bretherick

Philip W Ambler

Edward J Tinely

Philip Geoffrey Lodge

Kenneth Richard Seddon

Mark Louis Morgan

Edward J Tinley

Ala'a K Abdul-Sada

Alkylation process

A catalyst composition for preparing polyketones comprises

Catalyst composition

This invention relates to novel azo-dicarbonylo derivatives of a C3-C4 olefin polymers of the formula ##STR1## These can be prepared by reacting an ene compound such as a polypropylene or a polybutene, especially those with a vinylidene group, with an enophile such as X--CO--N.dbd.N--CO--Y. The resultant products can be used either as such or after further functionalization with eg polyamines as an additive for fuels and lubricants.

Substituted azo-dicarbonylo derivatives

Adhesive blends

Stabilized polyketone composition

This invention relates to a process for the polymerization of an olefinic feedstock comprising one or more of butene-1, butene-2 and iso-butene by bringing the feedstock into contact with an ionic liquid comprising a) an aluminium compound of the formula R.sub.n AlX.sub.3-n wherein R is a C1-C6 alkyl radical, X is a halogen atom and n is 0, 1 or 2, and b) a substituted imidazolium and/or a substituted pyridinium halide such that the melting point of the ionic liquid is below the reaction temperature in the range from -50.degree. C. to +100.degree. C. The polymers so produced can be used to react with alkenyl succinimides which are useful fuel and lubricating oil additives.

Preparation of butene polymers using an ionic liquid

Hydrogen sulphide is scavenged from a feedstock comprising crude oil and hydrogen sulphide by adding a compound of general formula ##STR1## to the feedstock. R is an alkyl group containing 1 to 18 carbon atoms, an aryl group, or an alkyl aryl group wherein the alkyl moiety contains 1 to 18 carbon atoms and L is a leaving group. Preferred scavengers include acetic anhydride and triacetamide.

Removal of hydrogen sulphides

Hydrogen sulphide is scavenged from a feedstock comprising crude oil and hydrogen sulphide by adding a compound of general formula: ##STR1## to the feedstock. X and Y are carbon or nitrogen atoms and the interatomic bond is triple or double as appropriate. Any two or more of R.sup.1 -R.sup.4 are organic groups containing electronegative functional groups. The remaining two or less of R.sup.1 -R.sup.4 are hydrocarbyl groups, hydrogen atoms or zero. Preferred scavengers include di-isopropylazo dicarboxylate and dimethylacetylene dicarboxylate.

Removal of hydrogen sulphide

Alkyl-, aryl- or alkylaryl-alkoxy halides are prepared by reacting the corresponding alcohol, phenol or alkyl phenol with ethylene oxide and/or propylene oxide in the presence of an amine catalyst to form an alkoxy alcohol, and directly reacting the latter with a halogenating agent in the continuing presence of the amine catalyst. Neutralization of the product and/or catalyst removal from the first stage is no longer necessary and reaction rates and yields are increased in the second stage.

Preparation of alkoxy halides

Betaines containing the morpholine nucleus, some of which are novel per se, are dissolved in sea water or formation water, the concentration of betaine being from 200 to 100,000 ppm to give a surfactant solution suitable for displacing crude oil from a formation in an enhanced oil recovery process. Included in the solution can be an anionic surfactant containing in its structure an ethoxylated benzene ring which shows a synergistic effect with the betaine in lowering the interfacial tension of the surfactant solution against oil. These betaines have high tolerance towards divalent metal cations and high temperature stability as compared with betaines previously proposed for enhanced oil recovery.

Compositions for use in oil recovery and method of use

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Walton-on-Thames, United Kingdom

Philip K Hodgson