Bp Chemicals Limited

The British Petroleum Company, P.l.c.

David A Kidd

Martin Philip Atkins

Sami A Barri

Ian S Biggin

This invention relates to a method of cracking polymers, especially waste hydrocarbon polymers to produce products of lower molecular weight. The process comprises feeding the polymer into a processing chamber or circular-cross section which chamber also has a bed of particulate material maintained in suspension and in toroidal shape by a hot gas introduced into said chamber so that the polymer intermingles with the particulate materials of the bed and is cracked into products of lower molecular weight. The invention is useful for converting polymeric wastes into products of commercial value such as e.g. waxes, lubricants and monomeric olefins at the same time reducing environmental pollution.

Process for converting polymers by contacting same with particulate

A process for the production of olefins which comprises passing an oxygenate-containing feedstock over a zeo type catalyst at a temperature greater than 200.degree. C. characterized in that the oxygenate-containing feedstock comprises C.sub.3 and/or C.sub.4 olefins and as oxygenate methanol formaldehyde and/or dimethylether, the molar ratio of olefin to oxygenate being greater than 1:20 and the zeo type catalyst being of TON-type structure.

Process for the preparation of branched olefins

This invention relates to a process for hydrolysing polymeric amides with a hydrolysing agent at elevated temperatures under the influence of ultrasound in a homogeneous reaction medium. The reaction is particularly suited to the production of polyacrylic acid from polyacrylamide.

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Fleet, United Kingdom

David A Kidd