Exxon Chemical Patents, Inc.

Jacqueline D Bland

Kenneth Lewtas

Albert Rossi

Robert Dryden Tack

Kenneth W Bartz

Iain More

Edwin W Lehmann

David P Gillingham

Sally J Ayres

Richard Dix Kerwood

John Edward Maddox

Distillate fuel is treated with additives whose structure match the crystal planes of the wax which crystallizes from the fuel to produce crystals below 4000 nanometres in size, suitable additive include novel sulpho-carboxylic materials particularly their esters and amine derivatives such as the amine salts and/or amides of ortho-sulpho benzoic acid.

Chemical compositions and use as fuel additives

Additives for distillate fuel are a copolymer of (1) an alpha olefin having two to seventeen carbon atoms per molecule or an aromatic substituted olefin having eight to forty carbon atoms per molecule and (2) a mono- or di-alkyl fumarate, itaconate, citraconate, mesaconate, trans- or cis-glutaconate, in which the alkyl group has 8 to 23 carbon atoms.

Fuel compositions

Additives for distillate fuels and distillate fuels containing them

Copolymers of straight chain alpha olefins and maleic anhydride esterified with an alcohol wherein the alpha olefin is of the formula:

Middle distillate compositions with improved low temperature properties

Additives suitable for improving the flow and/or depressing the cloud point of crude oils, lubricating oils and especially fuel oils are polymers containing defined alkyl groups of at least 8 carbon atoms chain length. Such polymers are either (a) of a mixture of monomers having only two alkyl groups being at least 3 carbon atoms longer than the other or (b) of a mixture of monomers having only three alkyl groups each differing by at least 3 carbon atoms and the middle alkyl group being half the combined length of the other two. Alternatively, the polymer may be derived from a monomer having the two defined alkyl groups (a) or the three defined alkyl groups (b).

Flow improvers and cloud point depressants

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Wantage, United Kingdom

Jacqueline D Bland