Exxon Chemical Patents, Inc.

Edwin W Lehmann

Kenneth Lewtas

Robert Dryden Tack

David P Gillingham

John Edward Maddox

Albert Rossi

Kenneth W Bartz

Jacqueline D Bland

Richard Dix Kerwood

John N Mears

Leslie G Jones

Brian H Wiggins

Compositions comprising a wax, a nucleator, and a wax growth arrestor improve the low temperature properties of fuel oils, especially high wax content fuels.

Oil additives and compositions

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

A compound of the general formula ##STR1## where X is CONR.sub.2 or CO.sub.2.sup.- + H.sub.2 NR.sub.2

Chemical compositions and their use as fuel additives

A test device for assessing low temperature performance of a wax-containing fuel which compriss: a vessel for containing a fuel to be assessed, having cooling and heating elements, for cooling and heating the fuel in the vessel and a filter element wherein the fuel is caused to pass through the filter of the filter element and the cooling and heating elements are so arranged that a stable convection current is set up in the fuel and the filter is so positioned that it receives wax settling from the fuel.

Testing apparatus and method

Growing community of inventors

Faringdon, United Kingdom

Edwin W Lehmann