Abstract: In a vegetables and fruits-storing method of conventional controlled atmosphere storage including continuously feeding the air of a definite oxygen content such as, for example, 2 - 3% by volume and definite amount obtain by means of an adsorber into a refrigerator to obtain an atmosphere suitable for storage of the vegetables and fruits, an improved method wherein the improvement comprises in the first step feeding the open air and the atmosphere of the refrigerator to be recycled in such order or simultaneously into the adsorber packed with an adsorbent such as zeolite or the like which adsorbs more nitrogen than oxygen, adsorbing the nitrogen in the open air and the atmosphere and expelling the high oxygen content air of the adsorber having oxygen content lower than that of the open air but higher than that of desired atmosphere of the refrigerator, in the next step expelling a part of the remained high oxygen content air, and in the further next step, desorbing the nitrogen and the remained high oxygen co

Abstract: Elastomeric copolymer of vinylidene fluoride and at least one other fluorine-containing monomer containing 28 to 92% by mole of the vinylidene fluoride unit and having an intrinsic viscosity of 0.4 to 1.3 at 35.degree. C. in methyl ethyl ketone, which is prepared by a two-stage polymerization process of vinylidene fluoride monomer and at least one other fluorine-containing monomer wherein monomers are copolymerized in an aqueous medium in the presence of a water-soluble radical polymerization initiator at a first stage to give a first stage-copolymer having an intrinsic viscosity of 0.01 to 3.0 at 35.degree. C.

Abstract: A coating composition which includes a polyarylene sulfide resin, at least one imido-containing resin selected from the group consisting of polyamideimide resins and polyimide resins, and a fluorocarbon polymer, the composition being able to be used both in an one-coat system and as a primer coat composition in a multi-coat system.

Abstract: A capacity control system of compressor for heat-pump refrigeration unit including a bypass adapted to communicate the suction side of the compressor with a bypass port opened to a cylinder chamber of the compressor, and a valve mounted adjacent the bypass port for opening and closing the bypass. The valve is subject at the back thereof to the pressure of a refrigerant in a refrigerant passage which becomes a low pressure area in a cooling mode operation of the refrigeration unit and becomes a high pressure area in a heating mode operation of the unit, and the valve is caused to be automatically opened or closed by the change in the pressure, so that the performance of the compressor can be automatically controlled in such a manner that its capability is reduced in the cooling mode operation and increased in the heating mode operation.

Abstract: A vaporizing type oil burner adaptable for use in forced flue type kerosene space heaters for household use and other heating equipment, including a fuel vaporization promoting plate made of a thin sheet of porous material and covering the entire area of the bottom of a vaporizer pot, an oil feeding device for feeding oil to the vaporizer pot which is capable of regulating the volume of oil fed to the pot, an oil diffusing device for control oil fed to the pot to the entire area of the fuel vaporization promoting plate, and a combustion air supply device. The fuel vaporization promoting plate is formed with a multitude of pores having surfaces functioning as surface means for vaporizing oil and receiving the heat of radiation generated by a flame, so that the time from initial combustion to steady state combustion following the starting of combustion can be shortened, the size of the burner can be greatly reduced, and incomplete combustion of the oil can be prevented when the burner is tilted.

Abstract: A process for production of 5-fluorouracil and its derivatives which comprises reacting a cytosine compound of the formula: ##STR1## wherein R is a hydrogen atom or a saccharide residue with fluorine or fluorine fluorosulfonate (FOSO.sub.2 F) in an aqueous medium to give the corresponding 5-fluorouracil compound of the formula: ##STR2## wherein R is as defined above.

Abstract: A composition in the form of a solution or dispersion which includes a perfluoroalkyl group-containing phosphoric acid ester of the formula(R.sub.f XO).sub.n PO(OH).sub.3-n(wherein R.sub.f represents a perfluoroalkyl group containing from 4 to 20 carbons, X represents a divalent organic residue and n is an integer from 1 to 3) and an additive which is a surface active agent, a silicone oil, a highly fluorinated organic compound, a wax or a mixture thereof, the composition being useful for imparting mold releasing properties to a mold.

Abstract: A chemical-resistant diaphragm composed of a fluorine-containing polymer and potassium titanate and a method for the manufacture of said diaphragm by the steps of adding titanium oxide or titanic acid to a fluorine-containing polymer and heating the resultant mixture in the presence of potassium hydroxide.

Abstract: A process for producing tetrafluoroethylene/hexafluoropropylene copolymer having a hexafluoropropylene content of 8 to 20% by weight and having an excellent stress-cracking resistance and also excellent heat resistance, molding properties, chemical resistance and electrical characteristics, which comprises polymerizing tetrafluoroethylene monomer and hexafluoropropylene monomer in the presence of a polymerization initiator, wherein the tetrafluoroethylene monomer is used in a large amount at the first stage of the polymerization reaction and thereafter the polymerization reaction is continued in a smaller amount of the tetrafluoroethylene monomer.

Abstract: Ion exchanger comprising a water-insoluble copolymer prepared by post-polymerizing at least one fluoroolefin monomer to a perfluorovinylacetic acid-vinylidene fluoride copolymer containing not less than 25% by mole of the perfluorovinylacetic acid unit in an aqueous solution of said copolymer in the presence of an organic or inorganic peroxide. The ion exchanger has excellent heat and chemical resistances and dimensional stability.

Abstract: A process for preparing 1-chloro-1,1-difluoroethane and/or 1,1,1-trifluoroethane by fluorination of 1,1,1-trichloroethane with anhydrous hydrofluoric acid in the presence of antimony pentachloride in a halogenated hydrocarbon solvent which is capable of dissolving both the catalyst and 1,1,1-trichloroethane, is substantially inert in the reaction system and which has a boiling point of above 0.degree. C and a melting point of below 60.degree. C. By varying the mole ratio of hydrofluoric acid to 1,1,1-trichloroethane both fed together into a solution of the catalyst in the solvent, 1-chloro-1,1-difluoroethane and 1,1,1-trifluoroethane are obtained with a variety of desired ratios.

Abstract: A 2-hydroxy-1,1,2,3,3-pentahydroperfluoroalkyl derivative of either one of the formulae:[RfCH.sub.2 CH(OH)CH.sub.2 OOC].sub.m QandQ'(NR.sub.1 R.sub.2).sub.m'wherein Rf is a perfluoroalkyl, an .omega.-hydro-perfluoroalkyl or an .omega.-chloro-perfluoroalkyl group having 4 to 20 carbon atoms, Q is a hydrocarbon residue having a valency corresponding to m which may contain one or more of --O--, --COO-- and --OH in and/or on the chain, Q' is a hydrogen atom or a hydrocarbon residue having a valency corresponding to m' which may contain one or more of --O--, --COO--, --NH--, --N.dbd. and ##STR1## IN THE CHAIN, R.sub.1 and R.sub.2 are each a hydrogen atom or a group of the formula: --CH.sub.2 CH(OH)CH.sub.2 Rf, at least one of R.sub.1 and R.sub.2 being --CH.sub.2 CH(OH)CH.sub.2 Rf, m is an integer of not less than 2 and m' is an integer of not less than 1, which is useful as an oil-repellent agent or an anti-soiling agent for fibrous materials.

Abstract: An improved process for fluorination of uracil, which comprises treating uracil with fluorine which is optionally diluted with an inert gas (e.g. nitrogen gas) at a temperature of -10.degree. to 15.degree. C in a 50 to 85% by weight aqueous solution of hydrofluoric acid as the reaction medium to form 5-fluorouracil, and optionally subjecting the reaction mixture to a heat treatment at a temperature higher than the reaction temperature, to give 5-fluorouracil in a high yield.

Abstract: Antimony pentachloride is recovered from a spent antimony catalyst mixture in a simple manner by bubbling through the spent catalyst mixture an inactive gas such as trichlorotrifluoroethane at an elevated temperature to convert and to remove high melting point or high sublimating point substances as lower boiling point substances; converting fluorinated antimony into chlorinated antimony by means of a chlorinating agent such as carbon tetrachloride; converting antimony (III) into antimony (V) by oxidation with chlorine; and recovering antimony pentachloride by distillation. The antimony pentachloride thus recovered may readily be used as a catalyst for fluorination of a chlorinated hydrocarbon by reaction with hydrogen fluoride.

Abstract: A process for preparing hexafluoropropanone-2 from hexafluoropropene by one step reaction which comprises contacting hexafluoropropene and oxygen with a fluorinated alumina as a catalyst.

Abstract: Improvements in a heating system which heats a fluid medium by a heat exchanger and delivers it to an indoor coil or coils for space heating. Refrigerant, such as fluorohydrocarbons for refrigerators, is utilized as the heating medium. The heat exchanger is supplied with heat from a heat source, such as hot water from a boiler, at a temperature higher than that of air around the exchanger. The refrigerant in liquid form is heated while being vaporized in the heat exchanger at a pressure greater than the saturation pressure corresponding to the ambient air temperature. The medium thus gasified to a high pressure and temperature is drawn into a circulating pump and then delivered to the indoor coil or coils, where it is condensed to a liquid with heat dissipation. In this way a great heating capacity is attained with the heating medium at a low rate of circulation.

Abstract: A low temperature energy carrying apparatus and method adapted for central cooling which comprises a hydrate circulating system for a liquid hydrate agent and hydrate crystals incorporated with a conventionally designed water circulating system. In the hydrate circulating system, the hydrate crystals are feed to the users side together with cooled water and decomposed therein into hydrate agent and cooled water absorbing the latent heat of decomposition. Therefore, the temperature of the cooled water during transport thereof to the users side is stabilized and in addition to the sensible heat of the cooled water the latent heat of the hydrate crystals can be utilized in the users side, thereby improving cooling effect in the users side. Also, the hydrate circulating system is adapted to use a hydrate agent in the liquid phase area which allows the operation of the system to be stabilized.

Abstract: An apparatus for fluidizing regeneration of activated carbon which has adsorbed therein organic contaminants such as organic amines, organic sulfur compounds and organic solvents. The apparatus comprises; a horizontal grid disposed within the housing thereof; a port for supplying activated carbon as well as a regenerating gas discharge port, both of which are provided in one end wall of the housing; and a regenerating gas supply port and a regenerated activated carbon discharge port, both of which are provided in the other end wall thereof.

Abstract: A cured rubber composition, which is obtained by curing a composition consisting essentially of a fluorine-containing ethylene copolymer and a silicone rubber and/or a fluorine-containing polymer with an organic peroxide as a curing agent. The cured rubber composition is excellent in heat, chemical, oil and solvent resistance, and hence can be used portions where the conventional synthetic rubber have not been usable.

Abstract: A coating composition comprising a fluororesin and a chelate compound of a transition element of Group IV in the periodic table in an aqueous medium, which can assure a firm adhesiveness to a substrate while maintaining advantageous properties inherent to the fluororesin.