Abstract: A resin composition comprising: 30 to 95 parts by weight of a biodegradable polylactic acid resin (A), and 70 to 5 parts by weight of a specified polyalkylene carbonate (B), providing that the sum of components (A) and (B) is 100 parts by weight. The invention provides an excellent resin composition which is biodegradable, transparent, flexible and has gas barrier properties and which is free from the occurrence of bleedout with the passage of time. Further, the resin composition of the invention is excellent in moldability, so that a variety of molded articles can be produced by various molding techniques and put to practical use. The resultant molded articles, when disposed of after use, exhibit high biodegradability in natural environment.

Abstract: A resin composition comprising: 30 to 95 parts by weight of a biodegradable polylactic acid resin (A), and 70 to 5 parts by weight of a specified polyalkylene carbonate (B), providing that the sum of components (A) and (B) is 100 parts by weight. The invention provides an excellent resin composition which is biodegradable, transparent, flexible and has gas barrier properties and which is free from the occurrence of bleedout with the passage of time. Further, the resin composition of the invention is excellent in moldability, so that a variety of molded articles can be produced by various molding techniques and put to practical use. The resultant molded articles, when disposed of after use, exhibit high biodegradability in natural environment.

Abstract: A process for producing refined methacrylic acid comprising the steps of oxidizing methacrolein and the like catalytically in a vapor phase to form a methacrylic acid-containing gas, cooling and condensing the gas to an aqueous methacrylic acid solution, adding to the solution an organic solvent that forms two liquid phases with water to carry out an extraction operation and thereby to obtain an extract, bringing the extract into contact with water to mix them together, separating the mixture into an organic phase and a water phase, and distilling the organic phase. According to this process, highly refined methacrylic acid containing little dibasic acids such as maleic acid and citraconic acid can be obtained economically and without increasing wastes that are unrecoverable to the process.

Abstract: A process for preparation of nitrous oxide, wherein ammonia is reacted with oxygen in the presence of steam using a copper-manganese oxide catalyst having diffraction angles measured by X-ray diffraction analysis of about 36.degree., about 58.degree. and about 64.degree.; a copper-manganese oxide catalyst suitable for the process. The catalyst is highly active and selective, has a long catalyst-lifetime, gives a non-condensable gas comprising nitrogen, oxygen and nitrous oxide which contains nitrous oxide in a high concentration, and is less deteriorative. The catalyst can be used in a process for preparation of nitrous oxide in which formation of NOx as by-products is reduced; and a process for stably recovering nitrous oxide.

Abstract: The present invention provides a process for the production of glyoxals which comprises effecting the oxidative dehydrogenation of a glycol at a temperature of 400.degree. to 700.degree. C. in the presence of a silver-based catalyst composed of silver and at least one element selected from the group consisting of gold, platinum, rhodium and palladium, and phosphorus or a phosphorus compound, as well as such catalysts. These process and catalysts make it possible to produce high-quality glyoxals in high yield and with industrial advantages while minimizing the contents of unreacted raw material and reaction intermediates such as glycolaldehyde and acetol.

Abstract: Melamine cyanurate is prepared by heating melamine powder and cyanuric acid powder at 250.degree. to 500.degree. C. substantially in the absence of any liquid medium. The melamine cyanurate can be obtained in a granular form when the heating is conducted subsequent to granulation of a mixture of both the powders.

Abstract: Sinterable crystalline aluminum nitride powder is produced by reacting alkyl aluminum with ammonia in a gas phase to produce an amorphous aluminum nitride presursor powder, and subjecting the precursor powder to a primary calcination in a reducing gas containing at least 20% (vol.) ammonia at 600.degree. C. to 1300.degree. C., and then subjecting the calcined aluminum nitride to a secondary calination in an inert gas or a reducing gas at 1400.degree.-1750.degree. C.

Abstract: Supply equipment for providing a stable supply of feed gas of an organic metal compound at a constant concentration comprises a cylindrical vessel with an organic metal compound housed, an inlet tube of carrier gas for vaporizing said organic metal compound, an outlet tube for letting out the carrier gas substantially saturated with the vaporized organic metal compound, a room provided in the lower part of the vessel which is connected to said carrier gas inlet tube, a packed bed of an organic metal compound formed above said room, and a partition with a plurarity of pores partitioning said room and said packed bed.

Abstract: A method for preparing high-purity aluminum nitride having high thermal conductivity and heat resistance for aluminum nitride substrates, which comprises the steps of reacting an organic aluminum compound with an aminotriazine in a solvent to obtain an aluminum nitride precursor, separating the precursor form the solvent, and heating the precursor at a temperature of 600.degree. C. or more in a reducing atmosphere and/or a non-oxidizing atmosphere. An aluminum nitride sinter is prepared by, if necessary, adding a sintering auxiliary to the above aluminum nitride powder, molding the powder into a desired shape, and then sintering the molded material at a temperature of 1,600.degree. to 2,000.degree. C. in a non-oxidizing atmosphere.

Abstract: A method for preparing high-purity aluminum nitride having high thermal conductivity and heat resistance for aluminum nitride substrates, which comprises the steps of reacting an organic aluminum compound with an aminotriazine in a solvent to obtain an aluminum nitride precursor, separating the precursor from the solvent, and heating the precursor at a temperature of 600.degree. C. or more in a reducing atmosphere and/or a non-oxidizing atmosphere. An aluminum nitride sinter is prepared by, if necessary, adding a sintering auxiliary to the above aluminum nitride powder, molding the powder into a desired shape, and then sintering the molded material at a temperature of 1,600.degree. to 2,000.degree. C. in a non-oxidizing atmosphere.

Abstract: There is disclosed a process for producing silanes by reducing polyhalosilane with a mixture of alkyl aluminum hydride and trialkyl aluminum, in which a treatment for reducing the content of trialkyl aluminum in the mixture is lowered to 10 mol. % or less of alkyl aluminum hydride prior to the reduction reaction.As to methods for reducing the content of trialkyl aluminum in the mixture, there are provided, for example, distillation, recrystallization, separation by complex formation, pyrolysis of trialkyl aluminum and decomposition by hydrogenation of trialkyl aluminum.

Abstract: There is disclosed a process for producing germanes by reducing germanium halide with a mixture of alkylaluminum hydride and trialkylaluminum, in which a treatment for reducing the content of trialkylaluminum in the mixture to 10 mol. % or less relative to the alkylaluminum hydride is carried out prior to the reduction reaction. As to the treatment for reducing the content of trialkylaluminum in the mixture, there are provided, for example, distillation, recrystallization, complex formation followed by separation, pyrolysis and decomposition by hydrogenation and addition of alkylaluminum halide to said mixture.

Abstract: Glyoxal may be produced with a high yield by bringing a gas, which has been formed by diluting ethylene glycol and molecular oxygen with an inert gas, into contact at a high temperature with a silver catalyst in the simultaneous presence of phosphorus or a phosphorus compound so as to effect the gas phase oxidation of the ethylene glycol.In the above process, it is possible to suppress the formation of glycolaldehyde, a reaction intermediate, and also to enhance the stability of the reaction by using silver powder having particle sizes of 1.times.10.sup.-3 mm or smaller as at least part of the silver catalyst.

Abstract: A fishing toy having a rotatable disc supporting a plurality of small toy magnetic bodies thereon. A plurality of magnets arranged under the disc to cause the magnetic bodies to overturn. Fishing rods, each having a suspended magnet, are movably mounted on a base to fish up the magnetic bodies individually.

Abstract: A toy fishing-play unit generally includes a base plate which is provided with a plurality of upwardly protruded ridges, a turning disk turnably mounted on the base plate and provided with a plurality of cells, a plurality of fish models removably received in the cells, a driving unit for turning the turning disk and a toy fishing tackle. When the fish model rides on the ridge a mouth of the fish model is opened to receive a bait, and when the fish model gets off the ridge the mouth of the fish model is closed to bite the bait.