Fmc Corporation

Hsiang P Liao

Joseph H Finley

Richard A Mohr

John Francis Start

Mixed phosphoric acid ester compositions containing less than 4 weight percent of a triaryl phosphate, from about 10 to about 20 weight percent of an aryl dialkyl phosphate and from about 65 to about 80 weight percent of an alkyl diaryl phosphate are prepared by heating a monohydric alcohol or alkoxy alcohol with a triaryl phosphate, such as triphenyl phosphate, in the presence of a catalytic amount of an alkali metal phenoxide, for example, potassium phenoxide. The mixed phosphoric acid ester composition may be separated from by-products of the reaction by distillation.

Process for the manufacture of alkyl diaryl phosphate esters

Mixed phosphoric acid ester compositions containing less than 4 weight percent of a triaryl phosphate, from about 10 to about 20 weight percent of an aryl dialkyl phosphate and from about 65 to about 80 weight percent of an alkyl diaryl phosphate are prepared by heating a monohydric alcohol with aqueous sodium hydroxide to form the sodium alkoxide, distilling off the water as an alcohol azeotrope and reacting the alcohol sodium alkoxide with a triphenyl phenol. The mixed phosphoric acid ester composition may be separated from by-products of the reaction by distillation.

Process for the manufacture of mixed phosphoric acid ester compositions

Mixed phosphoric acid ester compositions containing by weight less than 4% of a triaryl phosphate; from about 30% to about 35% of an aryl dialkoxyalkyl phosphate and from about 60% to about 65% of an alkoxyalkyl diaryl phosphate are prepared by heating an alkoxy alcohol with aqueous sodium hydroxide to form the sodium alkoxide, distilling off the water as an alkoxy alcohol azeotrope and reacting the alkoxy alcohol sodium alkoxide with a triphenyl phenol. The mixed phosphoric acid ester composition may be separated from by-products of the reaction by distillation.

Peroxycarboxylic acid compositions containing stabilizing ingredients are produced by the hydrogen peroxide peroxidation of corresponding carboxylic acids which are not substantially soluble in water by a continuous process in which the peroxidation reaction takes place in solution in concentrated sulfuric acid, or other strong acid, while that solution is intimately interdispersed, by means of agitation, with methylene chloride, or other organic solvent, in which the resulting peroxycarboxylic acid is soluble, but the carboxylic acid is not, and the sulfuric acid, or other acid, is recovered from the effluent of the process by reacting it with borax and caustic soda or soda ash to form crystals of boric acid and sodium salt of the strong acid which, in admixture with peroxycarboxylic acid recovered from the effluent, form the peroxycarboxylic acid composition product. The methylene chloride is also recovered from the effluent and recycled to the process.

Continuous process for the production of peroxycarboxylic acid

A process for removing arsenic from aqueous mediums by adding, in the presence of phosphorus, sufficient calcium hydroxide to adjust the aqueous medium to a pH of from about 7.0 to 11.5, whereby precipitates of both arsenic and phosphorus are formed and are subsequently separated from the aqueous medium. As a secondary treatment, calcium salts of arsenic and phosphorus in oxidation states lower than +5, and thus dissolved in the aqueous medium are oxidized, as by the addition of chlorine or hypochloride to such medium, and thereby converted to more insoluble forms which are separated from the aqueous medium as precipitates.

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Princeton, NJ, United States of America

Hsiang P Liao