Mobil Oil Corporation

Byron E Johnston

Roger P Napier

James M Horn

Thomas N Williams

Richard G Grotyohann

Robin Schlinger

There is provided a process for reacting pentaerythritol with a trivalent phosphorus trihalide conducted in the presence of a phosphorus acid catalyst such as methyl acid phosphate. The reaction product is a useful intermediate for the preparation of flame retardants.

Phosphorus acid catalyst for preparation of

This invention provides a process for removal of residual organic matter from wet process phosphoric acid purified by solvent extraction with a volatile solvent that comprises contacting said purified phosphoric acid with hydrogen peroxide at a temperature between about 100.degree. C. and about 150.degree. C., for between 1/4 hour and about 4 hours, and using a weight ratio of hydrogen peroxide to phosphoric acid between about 0.001 and about 0.05.

Process for removal of residual organic matter from purified phosphoric

This application is directed to a process for preparing dialkyl phosphoric acid, preferably di(2-ethylhexyl) phosphoric acid. This latter material is used in uranium extraction from wet-process phosphoric acid as a kerosine solution along with a synergist, trioctylphosphine oxide.

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Skillman, NJ, United States of America

Byron E Johnston