Phillips Petroleum Company

Joseph F Wilson

Robert S Parish

Lawrence M Fodor

Joseph R Kenton

Black carbonaceous floc in wet-process phosphoric acid is removed by contact with an oxidizing agent during the neutralization step with ammonia. In an embodiment the black floc is removed in liquid fertilizers derived from wet-process phosphoric acid by reaction with an oxidizing agent at high temperatures. The oxidizing agent is preferably nitric acid.

Process for removal of carbon black floc associated with wet-process

A method for producing a fire retardant insulating composition in which a fire retardant amount of monoammonium phosphate (MAP) having polyphosphate content of the range about 0 to about 10 weight percent is incorporated into a cellulose-base insulating material to produce a nontacky, fire retardant insulating composition. In an embodiment of the invention the monoammonium phosphate having a polyphosphate content in the range of up to about 10 weight percent is prepared by (1) contacting NH.sub.3 with an aqueous solution of H.sub.3 PO.sub.4 at a temperature of up to 177.degree. C. to form MAP and allowing the MAP thus formed slowly to cool to a temperature in the range of about 54.degree. to 104.degree. C. In another method for preparing MAP having a polyphosphate content in the range of up to about 10 weight percent a commercial aqueous ammonium phosphate fertilizer solution is treated by contacting it with an aqueous solution of H.sub.3 PO.sub.4 in an amount sufficient to adjust the pH of the solution to about 3.0 and thereafter heating the solution to a temperature of about 100.degree. C. for a time sufficient to obtain a pH of about 4.0 for the solution and subsequently allowing the MAP formed to cool slowly to a temperature in the range of about 54.degree. to about 104.degree. C. A fire retardant, insulating composition made using the methods above.

Fire-retardant insulating composition and its production

Stable low freeze point fertilizer solutions containing nitrogen, and sulfur are disclosed. The solutions contain specified ratios of ammonium nitrate, urea, and ammonium sulfate; such that the solutions are storage stable.

Fertilizer solutions containing sulfur and having low crystallization

A feed supplement consisting essentially of 100 parts by weight of dry urea, 22.1 to 46.4 parts by weight of ammonium phosphate solids and 126 to 174 parts by weight of water. In a further embodiment a feed supplement consisting essentially of urea, ammonium phosphate, molasses and water is disclosed.

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Bartlesville, OK, United States of America

Joseph F Wilson