Abstract: A process for continuously preparing silane and a coproduct by reacting a metal hydride such as NaAlH.sub.4 with a silicon halide such as SiF.sub.4, utilizing, in conducting the reaction, equipment which includes, in series, a primary reactor, a secondary reactor and a separation zone. The metal hydride is reacted in the first reactor with less than a stoichiometric amount of the silicon halide, and the unreacted metal hydride is then passed to the second reactor wherein the remainder of the hydride is reacted in the secondary reactor, in which a stoichiometric excess of the silicon halide is added. The rate of silicon halide or metal hydride addition is governed by a temperature differential feed back from the reaction in the secondary reactor so that overall a stoichiometric or substantially stoichiometric operation is achieved.

Abstract: An apparatus and process for maintaining the purity of solid/granular product and dispensing high purity granular product from a vessel. A noncontaminating surface is provided by a cup, cylinder, or other structure having a surface of silicon, silicon carbide, silicon nitride, sialon, or similar materials and preferably operates as an angle of repose valve in a pressurized system to prevent contamination by undue contact of the high purity product with conventional gastight valves such as ball valves, butterfly valves, pinch valves, etc.

Abstract: Described is a way of sealing a carbon body such as monolithic graphite tooling so that it retains its vacuum integrity through numerous thermal cycles typical of thermoplastic processing. This is accomplished by (a) applying to the body surface a coating formulation composed of a carbon-filled solution of a polyamic acid formed by reaction between pyromellitic acid dianhydride and 2,2-bis[4-(aminophenoxy)phenyl]hexafluoropropane, and (b) heat curing the coated body to cause the polyamic acid to imidize into a thermally cured polyimide.

Abstract: Hydrogen-containing effluent gas can be treated with activated carbon to remove boron or phosphorus impurity prior to recycle to a fluidized bed reactor. The process is conducted at cryogenic temperatures.

Abstract: Undesirable conversion of a silicon source, such as silane, in the freeboard above a fluidized bed of silicon particles in a fluidized bed reactor, can be reduced by cooling the gas within the freeboard. Preferably, the reduction in temperature is achieved by introducing into the freeboard, a stream of relatively cool quench gas such as hydrogen, which also reduces the concentration of silane in the freeboard. As a result of these two factors, the invention improves the service factor of the fluidized bed apparatus, and reduces the amount of silane conversion to undesired by-products.

Abstract: Process for retarding the decomposition of an amine alane, said process comprising contacting an amine alane which is substantially free of zirconium, hafnium, niobium, uranium, vanadium, and chromium, with an effective amount of a decomposition retarding agent selected from the class consisting of O.sub.2, CO, nitrogen axides and alkyl nitrites.

Abstract: A threaded thermoplastic closure suitable for fitment to a threaded container neck is disclosed. The closure is provided with one or more vent grooves cut through the primary threads in the inner wall of the closure skirt. The ends of each thread segment are rounded and a smaller reinforcing secondary thread within the groove extends across the groove connecting the thread segments. The lower edge portion of the secondary thread is aligned with the lower edge portion of the adjacent segments of the primary thread to maximize the venting space over the secondary thread.

Abstract: Synthesis of phenylserine ester (a) via benzaldehyde and glycine ester using serine hydroxymethyltransferase; and (b) via methyl benzoylacetate. Synthesis of hydroxy-aspertame or derivative by enzymatic coupling of phenylserine or derivative with aspertic acid or derivative. Hydrogenation of the coupled product to give as final product aspertame or analog with related processes and products.

Abstract: Sulfonyl isocyanates having the formula R--SO.sub.2 --NCO (wherein R is a C.sub.1 - to C.sub.18 - alkyl radical, a phenyl radical, a C.sub.1 - to C.sub.18 - alkyl phenyl radical or an isocayanate group) are obtained in high yield and excellent purity by reaction of the corresponding sulfonyl chlorides R--SO.sub.2 --Cl with trimethyl silyl isocynate in the presence of catalytic amounts of Lewis acids. The preferred Lewis acids are halides having the formula AX.sub.n (A=B, Al, Ti, Sn, V, Sb, Fe or Zn; n=valence of A).

Abstract: A wet process phosphoric acid which has been treated with aluminosilicate after the first stage of clarification can be further stabilized against precipitation of solids during storage and transport and the solids from the crystallizer more economically used to make diammonium and triple superphosphate fertilizers by introducing a second stage of clarification of the acid at a P.sub.2 O.sub.5 concentration of 38 to 42 weight percent.

Abstract: Use of reverse flotation for phosphate rock ore treatment, wherein starch is added first to depress phosphate rock particles, followed by addition of cationic reagent, e.g., amine to float the silica. Phosphate rock is recovered as sink concentrate and silica is recovered as float tailings.

Abstract: Disclosed herein is a method of increasing the sugar (primarily glucose and fructose) content in grapes by applying to grape vines (primarily to the leaves) a compound which is vanillin or a carboxylic acid salt having from 3 to 5 carbon atoms. Grapes are customarily harvested when the sugar level is about 16% "Brix", and application of the compounds of the present invention gives the grower a better means of controlling sugar level so that the fruit can be harvested in an orderly manner.

Abstract: A process for forming polymeric polyamine/amide by contacting, in a liquid media, a hydrocarbon polymer having olefinic double bonds therein, a nitrogen containing compound selected from ammonia, or a monomeric primary or secondary amine, water, and carbon monoxide, in the presence of a catalytic amount of a rhodium atom containing compound selected from metallic rhodium, rhodium salts, rhodium oxides, rhodium carbonyls and ligands thereof at a temperature of from 50.degree. to 250.degree. C. and at a pressure of from about 30 to about 300 atmospheres.

Abstract: To chemically bind either impure or purified enzymes to polyurethane to produce insolubilized bound enzymes which are still enzymically active and which may be more stable than the original enzyme, and which can be reused without appreciable activity loss and whose physical characteristics can be varied depending on the application for which they are intended.

Abstract: Disclosed herein is a method for producing 1-phenyl-3-cyanoureas with the general formula: ##STR1## by reacting the corresponding benzamide with an alkali metal or alkaline earth metal hypohalite followed by reaction with cyanamide.