Abstract: A mixed phenyl/mesityl phosphate ester composition that is useful as a fire retardant additive, having a phosphorus content of from about 8.2% to about 8.4% is prepared by reacting with agitation at about 120.degree. C. to 130.degree. C. distilled still bottom phenols with phosphorus oxychloride in the presence of a Friedel-Crafts catalyst to form a reaction product containing a substantial quantity of monoaryl phosphodichloridate and diaryl phosphochloridate. This reaction product is then further reacted at an elevated temperature with sufficient phenol to form a triaryl phosphate ester mixture. The mixed phenyl/mesityl phosphate ester so obtained remains a liquid at room temperature over a substantial period of time.

Abstract: An electrophoresis medium, comprising a copolymer of acrylamide and an ethylenically unsaturated resin formed by replacing at least some of the hydroxyl hydrogens in a polysaccharide with an ethylenically unsaturated group, is described.

Abstract: Cyclic phosphine oxides of the formula: ##STR1## wherein P is phosphorus, O is oxygen, A is an alkylene chain of 2 to 12 carbon atoms, Z is a polar group and R represents the carbon atoms in a phosphorus-containing ring formed by alkylating an ethylenically unsaturated cyclic hydrocarbon with phosphine.The cyclic phosphine oxides are useful as flame retardants for styrene modified polyphenylene ether resins.

Abstract: Process for recovery of elemental phosphorus from waste ponds by dredging the waste pond to obtain an aqueous phosphorus slurry, separating particles larger than 2 mm from the slurry, treating the remaining slurry in an initial hydrocyclone and removing an overflow of solids larger than 500 micrometers, treating the underflow from the initial hydrocyclones in smaller diameter hydrocyclones, removing a second overflow enriched in slimes and diminished in phosphorus, removing a second underflow enriched in phosphorus and diminished in slimes and heating it sufficiently to melt the phosphorus therein, treating the heated second underflow in a centrifugal separator, and separating and recovering a stream of coalesced phosphorus from a heavy fraction of impurities.

Abstract: A process of preparing a tertiary haloalkylphosphine oxide by reacting a tertiary hydroxyalkyl phosphine with hydrogen halide under acidic conditions is described.

Abstract: A device for detecting the isoelectric end point in an isoelectric focusing system by electronically integrating, over successive time intervals, a characteristic of the electrical input to said zone as it varies with the increasing resistance of the zone. Most conveniently, the measured characteristic is the current through the zone which, under constant impressed voltage or power, asymptotically approaches a minimum value as the end point is reached.The measured characteristic is continually converted to a sequence of pulses indicative of the value of the characteristic. The end point is indicated when the difference between counts of these pulses over successive time intervals reaches a preselected value. At the end point, provision is made for replacement of the focusing voltage with a lower voltage to keep the ampholytes focused. A signal can be activated at the end point.

Abstract: A continuous process for reducing the arsenic content of phosphorus is described in which the impure phosphorus is continually passed through a heat exchanger and heated to vaporize a portion of the phosphorus at a temperature not above 200.degree. C., separating the vaporized phosphorus in a disengaging zone under subatmospheric pressure and introducing it into a fractionating zone under subatmospheric pressure, fractionating the phosphorus from the less volatile arsenic, condensing under subatmospheric pressure low-arsenic phosphorus rising from the fractionating zone, returning a portion of the low-arsenic phosphorus condensate as reflux to the column, removing high-arsenic liquid phosphorus as bottoms from the fractionating zone, and recovering the remaining portion of low-arsenic phosphorus condensate as product.

Abstract: Liquid phosphorus as produced by the reduction of a phosphate ore in an electric arc furnace while of high purity contains color-causing impurities that impart to the phosphorus a black color by reflected light. Such liquid phosphorus is polished or refined to exhibit a yellow or yellow brown cast by mixing it with hot water and subjecting the mixture to intense agitation. The refined phosphorus is separated from the water phase which retains the impurities.

Abstract: A curable polyurethane composition, which gives improved adhesives on curing, comprises an NCO urethane prepolymer and, as the curative therefor, a mixture of an aliphatic hydroxy compound and a polyhydroxyalkylphosphine oxide.

Abstract: A heat curable polyurethane composition comprising a blocked NCO prepolymer and a hydroxyl curative containing a polyhydroxyalkylphosphine oxide.

Abstract: Low density hydraulic fluids, in which the base stock is a tri(C.sub.6 -C.sub.8 -C.sub.10) alkylphosphine oxide are described.

Abstract: 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.

Abstract: 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.

Abstract: A method for protecting citrus fruit against resistant organisms by treating fruit with a combination of a soluble sorbate and at least one antifungal agent of the benzimidazole type, an alkali metal o-phenylphenol or sec.-butylamine.

Abstract: In the anthraquinone process for manufacturing hydrogen peroxide an improvement is obtained in the productivity of a fixed-bed catalytic hydrogenator operating in the dispersed-bubble flow regime by premixing the hydrogen gas and the working solution by means of a static mixer.

Abstract: A process and apparatus are described for collection of gases and particulates which arise during the feeding of an electric furnace, especially in the manufacture of phosphorus. The collection system for the gases and particulates includes novel explosion panels which are employed in an enclosure that contains the gases and particulates, and the use of such panels also in the ductwork and filter units that conveys and treats the gases and particulates from the enclosure. A further treating system also prevents moisture in the gases and particulates from clogging the filters used to separate the particulates from the gases. Also described is a novel furnace feeding system that can be used in cooperation with the gas and particulate collection system.

Abstract: An electrophoretic support comprising a base plate having on at least one side thereof, a layer of an adherent resin containing ethylenically unsaturated groups capable of undergoing copolymerization with acrylamide. The support provides excellent adhesion for polyacrylamide gels and other electrophoretic media such as agarose.

Abstract: The growth of Clostridium botulinum and the formation of enterotoxin in carbohydrate food products, such as honey, is inhibited by adding to the carbohydrate food products an effective amount of a compound selected from the group consisting of hypophosphorous acid and its nontoxic water-soluble salts. Such additives may be present in combination with minor amounts, for example 40 ppm, of sodium nitrite.

Abstract: A process for treating shrimp is described that results in their having desirable moisture retention after cooking or freezing, while retaining their natural appearance, by contacting them with a mixture of sodium tripolyphosphate and sodium acid pyrophosphate salts in water, wherein the salts have a weight ratio of 80:20 to 60:40 and the mixture yields a pH in water of about 6.2 to about 7.1; optionally up to 7 wt % of ordinary salt can also be employed in the aqueous mixture of phosphate salts.

Abstract: An organic solvent system, for use in solvent extraction of wet process phosphoric acid, is a mixture of an organic phosphate ester and an essentially water-immiscible organic ketone or alcohol.