Abstract: A process for the production of aluminum oxide from aluminum compounds containing fluorine comprising:(1) extracting aluminum ions with an organic solvent containing one or more compounds selected from the groups of alkyl phosphoric acid, alkyl and aryl thio phosphoric acid, carboxylic acid and hydroxime together with a petroleum hydrocarbon as a diluent;(2) preparing aluminum compounds containing fluorine by stripping the aluminum ions in the resultant organic solvent from the step (1) in contact with an aqueous solution containing one or more compounds selected from the groups of HF, NH.sub.4 HF.sub.2, NH.sub.4 F or KHF.sub.2 and simultaneously regenerating the organic solvent; and(3) producing aluminum oxide by heating the resultant aluminum compounds containing fluorine from the step (2) in gas stream containing oxygen or H.sub.2 O.

Abstract: A process for producing a novel graphite fluoride type film on the surface of an aluminum substrate in which an aluminum substrate and a carbonaceous material or polycarbon monofluoride represented by the formula (CF).sub.n are heated in an atmosphere of fluorine gas. The film has a luster, and not only exhibits high degree of hydrophobicity but also has corrosion resistance to aqueous solutions of acid and alkali as well as a mechanical strength.

Abstract: A novel intercalation compound of a graphite with a thiazyl salt represented by the formula Z.S.sub.4 N.sub.4.2SbCl.sub.5 wherein Z stands for C.sub.24, pyrolytic carbon or pyrolytic graphite is prepared by reacting a graphite material with trithiazyl trichloride and antimony trichloride in the presence of a non-polar solvent. The graphite intercalation compound thus obtained has not only an excellent stability to humidity or moisture but also a high electrical conductivity. The novel intercalation compound according to the present invention may be practically used as a novel electrically conductive material and a catalyst of organic reactions.

Abstract: A method of producing a graphite intercalation compound by intercalating a substance into graphite between layers thereof, characterized in that graphite particles are subjected to electrolysis in an electrolytic solution containing a substance capable of intruding into the interlayer spacings of the graphite while applying a load to the graphite particles in at least one direction to press all the graphite particles to the surface of an anode. According to the method, there can be obtained the desired porduct having a uniform and high quality.

Abstract: The use of an isotropic carbon block having an anisotropy of not more than 1.2 in terms of an anisotropic ratio of specific resistance as an anode in the production of fluorine by the electrolysis of an electrolyte comprising a mixed molten salt system of potassium fluoride and hydrogen fluoride has been found to be extremely useful for attaining increase in critical current density so that occurrence of the unfavorable anode effect can be effectively prevented. With such an isotropic carbon block anode, even if the anode effect occurs, the electrolysis can be stably continued again by lowering the potential of the electrode. Further, the incorporation of a fluoride into the isotropic carbon block anode and/or the addition of a fluoride into the electrolyte is effective for further increasing critical current density.

Abstract: Novel metal salts of boric acid esters of saccharides have been found to be extremely useful for imparting a high oxidation-resistance to carbonaceous materials. The metal salts of the boric acid esters according to the present invention are water-soluble and can be easily formulated into aqueous solutions thereof. Therefore, the treatment of carbonaceous materials can be easily, simply done using an aqueous solution of the present metal salt of the boric acid ester.

Abstract: An electrolytic cell comprising a negative electrode having as the active material a light metal and a positive electrode as the main active material a poly-dicarbon monofluoride represented by the formula (C.sub.2 F).sub.n has been found to exhibit a high discharge voltage as compared with the conventional electrolytic cell of the type using as the active material of the positive electrode a polycarbon monofluoride represented by the formula (CF).sub.n and also been found to be excellent in flatness of discharge voltage and shelf-life. The electrolytic cell of the present invention can be produced at low cost due to high yield of (C.sub.2 F).sub.n in production, and is useful as the energy source of such devices as watch, clock, desk type computer, small type radio, etc.

Abstract: Wet graphite particles obtained by subjecting graphite particles to oxidizing treatment with nitric acid of comparatively low concentration and a permanganic acid salt and impregnating the treated graphite particles with a specific antioxidant comprising a metal salt of a boric acid ester of a saccharide, are heated to form expanded graphite masses, which are then compressed together to obtain a flexible graphite product. The thus obtained flexible graphite product is not only excellent in heat resistance and chemical inertness but also free of contamination with sulfur and chlorine, and is very useful in various applications.

Abstract: A process for preparing a novel chemical compound poly-dicarbon monofluoride represented by the formula (C.sub.2 F).sub.n and having a crystalline structure of packing form featured by its layer structure stacked with an interlayer spacing of about 9.0 A. Such process consists in that a particulate carbon material having a specific crystallinity is reacted with fluorine at 300.degree. to 500.degree. C. According to the process, the desired product can be obtained in a yield as high as 100% with respect to not only the carbon material employed but also the fluorine employed.

Abstract: A novel chemical compound poly-dicarbon monofluoride represented by the formula (C.sub.2 F).sub.n and having a crystalline structure of packing form featured by its layer structure as shown in FIG. 12 hereof stacked with an interlayer spacing of about 9.0 A. Such new compound can be produced under relatively mild reaction conditions and obtained in a yield as large as 100% with respect to not only the carbon material employed but also the fluorine employed. The new compound is black under the formation conditions and of low crystallinity, but it can be easily converted to that of high crystallinity and white color by heat treatment in a fluorine atmosphere. The new compound has a wide variety of uses, for example, as lubricants, stain-resistant and water-repellent materials, cathode materials in high energy primary cells, etc.

Abstract: A novel chemical compound poly-dicarbon monofluoride represented by the formula (C.sub.2 F).sub.n and having a crystalline structure of packing form .[.featured by its layer structure as shown in FIG. 12 hereof.]. stacked with an interlayer spacing of about 9.0 A. Such new compound can be produced under relatively mild reaction conditions and obtained in a yield as large as 100% with respect to not only the carbon material employed but also the fluorine employed. The new compound is black under the formation conditions and of low crystallinity, but it can be easily converted to that of high crystallinity and white color by heat treatment in a fluorine atmosphere. The new compound has a wide variety of uses, for example, as lubricants, stain-resistant and water-repellent materials, cathode materials in high energy primary cells, etc.