Abstract: This invention relates to a process for separating one or more cyclic products from a reaction product fluid comprising one or more cyclic reactants, a metal-organophosphorus ligand complex catalyst, optionally free organophosphorus ligand, a non-polar solvent and said one or more cyclic products, wherein said process comprises: (1) reacting said one or more cyclic reactants in the presence of said metal-organophosphorus ligand complex catalyst, optionally free organophosphorus ligand and non-polar solvent to form a multiphase reaction product fluid; and (2) separating said multiphase reaction product fluid to obtain a non-polar phase comprising said one or more cyclic reactants, metal-organophosphorus ligand complex catalyst, optionally free organophosphorus ligand and non-polar solvent and a polar phase comprising said one or more cyclic products.

Abstract: A spacecraft carries a deployable active antenna array panel(s) and a deployable solar array panel(s). In the stowed condition, the antenna array panel(s) is sandwiched between a side of the body of the spacecraft and the solar array panel(s). This stowed state prevents the antenna panels from becoming too cold by radiation, or too hot by insolation, in an intermediate orbit. The outermost solar panel preferably has its active surface facing outward, so that it can generate electricity in the intermediate orbit.

Abstract: A process for the preparation of carbon and/or silicon coated ceramic fibers is disclosed involving contact of a preceramic fiber with a hydrocarbon or a silane which decomposes at a temperature no higher than 500.degree. C. at 1 atmosphere.

Abstract: The present invention relates to monoanhydride monomer compounds, methods of making such compounds and reaction products of the monoanhydride-diacid compounds with other monomers. The inventive monomer compounds exhibit selective reactivity, that is, the dianhydride locus is substantially more reactive towards amines than the diacid locus making it possible to sequentially synthesize a new class of materials suitable for membranes, catalytic substrates or any speciality material required for advanced applications.

Abstract: An array antenna especially adapted for spacecraft use includes a support frame made up of intersecting beams which form an "eggcrate" of square openings. A plurality of subarrays or radiating tiles are dimensioned to fit within the openings. Distortion of the support frame due to external forces, or due to expansion and contraction of the radiating tiles, is accommodated andor resisted by a four-point mounting arrangement for each tile. Each mounting is located on the center of the sides of the radiating tile, and the corresponding center of the side of the opening in which it fits. Each mounting consists of a thin, flexible mounting beam, extending parallel to the associated support beam, and fastened to the support beam at the ends of the mounting beam. The center of the side of the tile is fastened to the center of the flexible support beam, so expansion and contraction of the tile are compensated by bending of the flexible beam.

Abstract: A novel curing process for preceramic organosilicon polymers is disclosed which involves contact with a gaseous hydrogen halide.

Abstract: Asymmetric hollow fibers comprising a fluoropolymer, and a process for making such fibers. The hollow fibers are useful for making fluid separation membranes, especially gas separation membranes. In one embodiment of the process of this invention, a polymer dope having a viscosity of about 3000 poise or greater is prepared by solvating the polymer in a solvent system containing about 40%-90% N-methyl-2-pyrrolidone and about 60%-10% propionic acid by weight. The dope is dry-jet wet-spun into hollow fibers using a water-NMP core solvent. The fibers are coagulated in methanol. The fibers are then coated with a highly permeable material.

Abstract: A ceramic composition of matter which is sinterable at low temperatures is composed ofa) 40 to 90% by weight of a finely disperse, high-melting oxidic material andb) 10 to 60% by weight of a finely disperse glass having a softening point of 500.degree. to 850.degree. C., a coefficient of thermal expansion (=CTE) of 2 to 5.times.10.sup.-6 K.sup.-1 (measured in the interval from 0.degree. to 400.degree. C.) and a dielectric constant of less than 5 (measured at 10.sup.6 Hz and 20.degree. C.). The finely disperse oxidic material is composed of a mixture of MgO, Al.sub.2 O.sub.3 and SiO.sub.2 in an Al.sub.2 O.sub.3 /MgO weight ratio of 1.8-4 with an SiO.sub.2 weight fraction of 42-65% by weight or an equivalent quantity of corresponding oxide precursors which, on heating, decompose to give these oxides. The MgO or the MgO precursor has a mean grain size of 0.05 to 3 .mu.m and the SiO.sub.2 or the SiO.sub.2 precursor has a mean grain size of 2 to 20 .mu.m. The composition sinters at 900.degree.-1100.degree. C.

Abstract: A novel curing process for preceramic organosilicon polymers is disclosed which involves contact with a gaseous thionyl chloride.

Abstract: This invention provides a process for monomeric thioloesterification of 1,3-alkadiene in the presence of a catalyst which is a stabilized complex of palladium, tertiary phosphine ligand and thiol compound.Monomeric thioloesterification of 1,3-butadiene with 1-butanethiol and carbon monoxide in accordance with the present invention process provides a high conversion and selectivity yield of 1-butyl 3-thiolopentenoate product.

Abstract: This invention provides a process for the production of a carbonate diester which involves heating an oxalate diester in a liquid medium containing an alcoholate catalyst to yield carbonate diester and carbon monoxide.

Abstract: This invention provides a catalyst composition which is a solvent solution of halide-free complex of palladium compound and tertiary phosphine or phosphite ligand which is stabilized with a hindered thiol compound. The catalyst is adapted for hydroesterification of an alpha-olefin with carbon monoxide and hindered thiol compound.

Abstract: This invention provides a process for dimeric hydroesterification of 1,3-alkadiene in the presence of a catalyst which is a stabilized complex of palladium, tertiary phosphine ligand and thiol compound.

Abstract: This invention provides a process for hydroesterification of an alpha-olefin with carbon monoxide and hindered thiol compound, in the presence of a catalyst which is a stabilized complex of palladium and tertiary phosphine ligand.

Abstract: This invention provides a process for dimeric hydroesterification of 1,3-alkadiene in the presence of a catalyst which is a stabilized complex of palladium, tertiary phosphine ligand and thiol compound.