Abstract: A vent-type plastication molding machine has a material supply rate control system. The reciprocal sliding motion speed of the screw in an axial direction of the heating cylinder is detected by a detector comprising a rack fixed to the reciprocally sliding portion of the machine, a pinion engaging with said rack and rotatably mounted on the stationary portion of the machine, and an electric generator connected with said pinion.

Abstract: Biochemical optical resolution of DL-tryptophanes in which DL-tryptophane amides are interacted with the culture products, or their treated products, of a microorganism capable of producing amidase is described. L-tryptophane amides in racemic DL-tryptophane amides are asymmetrically hydrolyzed to form optically active L-tryptophanes at a high yield and almost all D-tryptophane amides remain without being subjected to hydrolysis. The resultant D-tryptophane amides are readily hydrolyzed, after separating L-tryptophanes, to form optically active D-tryptophanes at a high yield.

Abstract: Benzene is catalytically oxidized in the vapor phase with oxygen in the presence of an alcohol to be converted to phenol. The catalyst used is represented by the formula: M.sub.a Ag.sub.b P.sub.c O.sub.d wherein M is selected from zinc, titanium, zirconium, tin, bismuth and vanadium, Ag is silver, P is phosphorus and O is oxygen, and a=1, b=0.005.about.5 and c=0 to 6. Phenol is obtained at an enhanced yield even though the catalytic oxidation is carried out at a relatively low temperature as compared with conventional catalytic oxidation processes.

Abstract: An improved catalyst suitable for use in the production of acrylonitrile by the catalytic ammoxidation of propylene in a fluidized bed reactor is provided. This catalyst contains 40 to 60% by weight of silica, in terms of SiO.sub.2 , and 60 to 40% by weight of a composition having the formula:Mo.sub.10 Co.sub.2-8 Ni.sub.0-8 Fe.sub.0.1-7 Bi.sub.0.1-3 Zr.sub.0.1-4 A.sub.0.01-1 X.sub.0-5 O.sub.32.5-78.5wherein A is the alkali metals, X is Ti, Te, V, Mn, Cr, W and/or Sn, provided that the total number of Co and Ni atoms is 2 to 10, and has 150 to 500 A of the average pore radius, 0.2 to 0.5 cm.sup.3 /g of the total pore volume and 30 to 60 m.sup.2 /g of the specific surface area. This catalyst has an improved attrition resistance and acrylonitrile can be produced, in the presence of this catalyst, at a high yield by the ammoxidation reaction of propylene in a fluidized bed reactor.

Abstract: In cylindrical insert loading apparatus of the type wherein an insert transfer unit is reciprocated by a transfer device between stationary and movable metal molds of a die cast machine and an insert supply unit, the insert transfer unit comprises a movable frame and insert loading cylinders are mounted on the movable frame with their operating axes cross with each other. After the inserts have been supplied from an insert supply furnace to the operating ends of insert loading cylinders, the insert transfer unit is moved between the stationary and movable molds while maintaining horizontal attitude. The movable frame is moved in the axial direction of the die cast machine until the insert transfer unit collides against the movable metal mold to align the inserts with the insert receiving sections in the movable metal mold. Thereafter, insert loading cylinders are operated to load the inserts and the insert transfer unit is returned to the insert supply furnace.

Abstract: Tertiary phosphine dichlorides are non-catalytically produced by directly reacting chlorine and carbon monoxide with a tertiary phosphine oxide preferably in a halogenated hydrocarbon solvent at a temperature of from -20.degree. to 100.degree. C.

Abstract: Maleic anhydride is prepared by the catalytic oxidation of unsaturated hydrocarbons having 4 to 6 carbon atoms, at a temperature of from 350.degree. to 500.degree. C., in the presence of a catalyst which is produced by a method wherein a mixture of a titanium oxide and a vanadium compound in an atomic ratio of from 1 to 15 is calcined at a temperature of from 630.degree. to 1000.degree. C. to prepare a precursory catalyst, and wherein a gas mixture containing an organic phosphorus compound and a carrier gas is brought into contact with a mass of the percursory catalyst at a supply rate of the phosphorus compound being from 0.01 to 10 millimoles/hr per 1 ml of the mass of the percursory catalyst and at a temperature of from 350.degree. to 600.degree. C. during when a total amount of from 0.3 to 30 millimoles of the phosphorus compound per 1 ml of the mass of the precursory catalyst passes through the mass of the precursory catalyst.

Abstract: Carbon fibers having excellent modulus of elasticity and tensile strength are produced in a high yield by a process wherein polybutadiene fibers are prepared by melt-spinning polybutadiene having at least 85% of vinyl structure, a melting point of at least 100.degree. C and a reduced viscosity of 0.3 to 1.2 dl/g; the fibers are then treated in a solution or suspension of a Lewis acid in an inert organic liquid, whereby the pollybutadiene is cyclized and cross-linked; the polybutadiene fibers treated as mentioned above are further treated in a melted sulphur or a sulphur-containing solution at a temperature of 170 to 300.degree. C, whereby the cyclized and cross-linked polybutadiene is dehydrogenated and aromatized; and the fibers treated as mentioned above are carbonized by raising the temperature thereof to 750.degree. C to 3000.degree. C to form carbon fibers or graphite fibers. If so desired, the ordinary carbon fibers which have been produced at 750 to 1500.degree.

Abstract: Fine metallic nitride powders having a high purity are prepared, without causing any plugging or other problems in the reaction apparatus and with easy heat control of the reaction, by reacting a metallic halide with liquid ammonia in the presence of an organic solvent which has a specific gravity higher than that of liquid ammonia, and also is not miscible or is only slightly miscible with liquid ammonia at a reaction temperature. The process according to the present invention is effected by introducing the metallic halide into the lower organic solvent layer of the reaction system.