Bp Chemicals (additives) Limited

Bp Chemicals (additive) Limited

Andrew Pearce

Stephen J Cook

Sean P O'Connor

John Crawford

Thakor Kikabhai

David B McLeary

Sean P O'Conner

Non-sulphurized overbased metal salts of sulphur-free calixarenes having a substituent hydroxyl group or groups available for reaction with metal base and their preparation are claimed. The salts are useful as additives to lubricating oils by reason of their acids neutralization capability, their detergent and their antioxidant properties.

Process for the production of overbased calixarates

Non-sulphurized overbased metal salts of sulphur-free calixarenes having a substituent hydroxyl group or groups available for reaction with metal base are claimed. The salts are useful as additives to lubricating oils by reason of their acids neutralization capability, their detergent and their antioxidant properties.

Overbased calixarates, compositions containing them and use as

A fuel composition for use in internal combustion engines which composition comprises (A) a major amount of a fuel suitable for use in an internal combustion engine, preferably either a lead free or low-lead fuel for use in a spark ignition engine and (B) a minor amount of a composition comprising a metal salt in the form of a particulate dispersion. Examples of suitable metal salts include potassium borate, sodium borate, potassium carbonate and potassium bicarbonate.

Fuel composition containing an additive for reducing valve seat recession

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North Humberside, United Kingdom

Andrew Pearce