Abstract: This invention relates to a polyisocyanate prepolymer for polyurethane and polyurethane/urea elastomer synthesis and to the resulting elastomer. The prepolymer is formed by reacting a cyclohexanediisocyanate with a long chain polyol under conditions such that essentially a 2:1 adduct is formed. Excess cyclohexanediisocyanate is removed prior to forming the elastomer.

Abstract: This invention relates to a process for producing mono-ortho-tert-butyl-aniline in high security selectivity and at high conversion using a silica-containing catalyst. The reaction is carried out using a fixed bed reactor. Di-tert-butyl derivatives are avoided by maintaining preselected mole ratios of isobutylene to aniline, preselected temperatures and preselected reaction times.

Abstract: A process is described for recovery of a more selectively adsorbed key component from a gas mixture containing the key component and one or more less selectively adsorbed secondary components using vacuum swing adsorption. The process minimizes capital costs by reducing or eliminating gas storage vessels and reduces power requirements by operating without a feed compressor or elevated pressure feed, whereby feed is induced at least in part by vacuum conditions achieved by pressure equalization between parallel adsorption beds. Alternatively, at least a minor amount of less selectively adsorbed secondary component roduct can be recovered.

Abstract: The present invention relates to a bioactive composition having a controlled, sustained release delivery pattern when contacted with a suitable surrounding media. The composition comprises a pharmaceutically, insecticidally, herbicidally or fertilizing bioactive material core, soluble in a given surrounding media, the core present in an amount at least sufficient for a total dosage during a specified treatment period; a first coating enveloping the bioactive material core comprising a polymer or a blend of polymers, said polymer or blend of polymers being swellable upon penetration by the surrounding media; and a second coating enveloping the first coating, the second coating comprising a polymer or a blend of polymers being water-insoluble and forming a semi-permeable barrier to the inward diffusion of the surrounding media and the outward diffusion of the bioactive material dissolved in the surrounding media.

Abstract: A gas generator for automobile gas bags and the like includes a grain wherein a plurality of wafers of combustible gas generating material is arranged in a side by side array and a plurality of meshed cushion members is disposed in alternating relation between the wafers and compressed between the wafers in order to provide improved burn surface neutrality for more uniform inflator gas flow and better utilization of the gas generant, increased retention of solid residue in the combustion chamber for reduced plugging of the gas filters and cleaner inflation gas, a higher volumetric loading fraction so that the size and weight of the inflator may be reduced, and structural suspension of each individual wafer between the adjacent compressed cushion members to reduce breakage and damage of the wafers during the many years the inflator may remain in an automobile.

Abstract: Substance loss is minimized in a station for loading a container with cryogenic substance stored in a tank. A throttle vent valve is provided at the outlet vent of a container being loaded for controlling the differential pressure between the storage tank and the container. The throttle vent valve is adjusted to maintain the differential pressure at a value equal to the optimum differential pressure for minimizing substance loss. The optimum differential pressure is selected by determining the filling loss for a plurality of values of differential pressure and selecting the differential pressure which produces the minimum filling loss.

Abstract: An improved process and regenerator suited for the regeneration of coke contaminated catalysts. Such coke contaminated catalysts are formed during the fluidized bed cracking of crude oil derived feed stocks into motor fuels and other distillates. The improved regenerator is equipped with an upper combustion zone for oxidizing carbon present on the catalyst to carbon dioxide and water and a lower cooling zone wherein hot catalyst is transported from the upper combustion zone to the lower cooling zone through a substantially vertical conduit for indirect heat exchange contact with a coolant for reducing the temperature thereof. The cooled catalyst is returned to the upper combustion zone. Air is used to fluidize the cracking catalyst in the lower cooling zone and is vented to the upper combustion zone and used as a source of oxidizing gas.

Abstract: A process and system are set forth for improving an oxygen-enriched Claus plant by introducing a water stream into the reaction furnace to moderate oxygen-induced high temperatures which allow oxygen-enrichment and attendant throughput in the Claus plant to higher levels than heretobefore practiced.

Abstract: A bubbler container for containing and transporting ultra-pure corrosive and poisonous liquid reagents which must be protected from exposure to air and from transmission of gas or vapor through containment walls, means for using the same in connection with unique valving and multiple layer seals for conduits is disclosed.

Abstract: An integrated process for producing higher alcohols, methanol and ammonia is set forth wherein two parallel reformations of methane are utilized to produce synthesis gas for the feed to the alcohol production and hydrogen for the ammonia production.

Abstract: A process and apparatus are disclosed for recovering olefins, particularly C.sub.3, C.sub.4, and C.sub.5 olefins, from gaseous mixture thereof with lower-boiling components. The olefin-containing gas mixtures is compressed and cooled to yield vapor and condensate streams, the vapor stream is further cooled forming additional condensate, both condensate streams are combined and adiabatically flash evaporated, and the remaining liquid is distilled to recover the desired olefins in a liquid bottoms products. Flash vapor, and optionally the distillation vapor product, are recycled to the compression step.

Abstract: This invention relates to high molecular weight toluenediamine-containing polyamide resins formed by the reaction of a mixture of 2,4-toluenediamine and 2,6-toluenediamine and derivatives thereof with an aromatic diacid or precurser thereof. The resulting polyamides are amorphous, as opposed to crystalline. Because they are amorphous, they lend themselves to a wide variety of processing techniques and because of their high molecular weight, they have outstanding physical properties.The polyamides are prepared using a precondensate method wherein a mixture of the toluenediamine isomers and aromatic acid, usually in the form of the aromatic acid dihalide, is reacted at relatively low temperatures forming a precondensate and the precondensate subsequently polymerized in the presence of an acid acceptor.

Abstract: A process is set forth for recovery of nitrogen from a feed gas stream, containing nitrogen and oxygen, using a cryogenic separation wherein a recycle stream having an oxygen content above, equal to or below that of the feed gas stream is recycled from the cryogenic separation to the feed gas stream with a split reboil-condenser function that would allow variation of the oxygen content of the recycle stream.

Abstract: Substance loss is minimized in a station for loading a container with cryogenic substance stored in a tank. A throttle vent valve is provided at the outlet vent of a container being loaded for controlling the differential pressure between the storage tank and the container. The pressure of the substance being loaded and the pressure within the container are sensed and the differential pressure is monitored. The throttle vent valve is adjusted to bring the differential pressure to a value equal to the optimum differential pressure for minimizing substance loss. The optimum differential pressure is selected by determining the filling loss for a plurality of values of differential pressure and selecting the differential pressure which produces the minimum filing loss. Overfilling of the container is prevented by sensing the temperature at the outlet vent and terminating the supply of substance to the container when the temperature of the vent reaches a predetermined level.

Abstract: A system and method for loading liquid gases into a container includes supplying substance to a pump simultaneously with the evacuation of the container for cooling the pump down during evacuation and starting the pump motor when the pump has reached a low temperature determined in accordance with the pressure of the substance storage tank. An analyzer for detecting the presence of contaminants is coupled to the evacuation line in fluid communication with the substance removed from the cylinders. Cavitation during the loading operation is detected by monitoring the flow of substance from the pump. A plurality of containers of differing sizes are loaded simultaneously on the same manifold. An isolation valve is provided in the manifold for terminating flow of substance to smaller containers when the smaller containers are full while permitting substance to continue to flow to larger containers coupled to the manifold.

Abstract: A system and method for loading liquid gases into a container includes supplying substance to a pump simultaneously with the evacuation of the container for cooling the pump down during evacuation and starting the pump motor when the pump has reached a low temperature determined in accordance with the pressure of the substance storage tank. An analyzer for detecting the presence of contaminants is coupled to the evacuation line in fluid communication with the substance removed from the cylinders. Cavitation during the loading operation is detected by monitoring the flow of substance from the pump. A plurality of containers of differing sizes are loaded simultaneously on the same manifold. An isolation valve is provided in the manifold for terminating flow of substance to smaller containers when the smaller containers are full while permitting substance to continue to flow to larger containers coupled to the manifold.

Abstract: A radiation gathering reflector and a method of making a radiation gathering reflector. Resin impregnated fibrous material is wound onto a mandrel which has a pair of opposing surfaces of revolution each of which has a shape corresponding to a predetermined shape of the inner reflector surface, and the resin is allowed to polymerize to form a composite which includes two integrally connected structural support members. An equatorial cut is formed in the composite to separate the support members from each other and from the mandrel. Then, a reflective surface is formed on the inner surface of at least one of the separated support members for gathering radiation. Alternatively, the reflective surface is formed on the surface of the mandrel and the resin impregnated fibrous material is wound onto the reflective surface and allowed to polymerize to form the composite.

Abstract: Novel compositions of matter are disclosed having the formula: ##STR1## wherein the carbon rings are fully fluorinated to remove all hydrogens and olefinic character. The compositions have utility as heat transfer agents, hydraulic fluids, vapor phase soldering fluids, gas (O.sub.2, N.sub.2, CO.sub.2, H.sub.2, etc.) transport agents, such as in biological and medical fields, as well as utility as burn-in test fluid.

Abstract: The present invention relates to a binder and a method for making and shaping a green body of ceramic powder and subsequently producing a formed ceramic body. The method of the present invention comprises admixing a ceramic powder with a binder comprising a polyalkylene carbonate to form a ceramic-binder mixture. The binder of the present invention comprises a polyalkylene carbonate, preferably polyethylene carbonate or polypropylene carbonate.