Shell Oil Comapny

William A McLaughlin

Edwin A Richardson

David C Berkshire

Gary Drinkard

In the production of bisphenols, color bodies which have been adsorbed on cationic exchange resins are removed by washing with at least one phenate selected from phenates of an alkali metal and of ammonia.

Removal of color bodies in bisphenol production

The acidizing of a reservoir, particularly one that contains an asphaltenic oil, is improved by using an aqueous solution of strong acid which contains enough sulfosalicylic acid to prevent the formation of iron-asphaltenic solids.

Acidizing reservoirs while chelating iron with sulfosalicylic acid

A reservoir which contains an asphaltenic oil can be acidized with an aqueous acid without causing a deposition of permeability impairing iron-asphaltene compounds by dissolving or dispersing an effective amount of salicylic acid within at least the first injected portion of the aqueous acid.

Acidizing asphaltenic oil reservoirs with acids containing salicylic acid

This invention is a process for mining an underground formation of coal having high oxygen content by contacting the coal with a heated basic aqueous solution for a time sufficient to dissolve at least a portion of the coal formation to produce a coalate. Periodically or continuously, some of the dissolved material is removed to facilitate or improve access to the coal formation. The dissolved coal or coalate is then treated with a regenerating agent to recover basic aqueous solution from the coalate.

Growing community of inventors

Bellaire, TX, United States of America

William A McLaughlin