Abstract:
The bleaching compositions of discolored teeth comprise titanium dioxide initiating photocatalyst action with light irradiation, chemical compounds generating hydrogen peroxide in an aqueous solution and thickening agents. Further the bleaching methods of discolored teeth comprising applying the bleaching composition onto the surface area of the teeth and then initiating photocatalyst action by irradiating the applied surfaces area with light. Therefore, the present invention shows remarkable bleaching results due to easy application of the compositions onto discolored teeth and keeping the original activity of the photocatalyst without its deterioration.
Abstract:
A process for efficiently separating and recovering a ruthenium compound used as the catalyst in the production of adamantanols. The adamantanols are produced by hydroxylating an adamantane compound in the presence of a ruthenium compound and a salt of hypochlorous acid in a water/organic solvent two-phase system. The hydroxylation product liquid is added with an oxidizing agent to allow the ruthenium compound to be extracted into the organic phase. The ruthenium compound is separated and recovered from the organic phase. Alternatively, the ruthenium compound is back-extracted into the aqueous phase by adding an aqueous alkali solution to the organic phase. Then, the ruthenium compound is separated and recovered from the aqueous phase.
Abstract:
An insect-proofing agent comprising 1,3,5-trioxane as an active ingredient is disclosed. This insect-proofing agent has a high insect-proofing action and gives no irritating odor, and the insect-proofing agent is not toxic to human bodies and has a high safety. Furthermore, this insect-proofing agent causes no discoloration in metallic substance such as silver thread, gold threads and spangles used for clothing decoration. This insect-proofing agent is effectively applied in the form of a solid preparation, an aqueous solution or an organic solvent solution.
Abstract:
By incorporating a liquid or solid silicone or paraffin into 1,3,5-trioxane, agglomeration of trioxane particles and adhesion of the trioxane to a machine wall or the like can be prevented. The silicone or paraffin is used in an amount of 0.003 to 1% by weight.
Abstract:
Disclosed is a hygroscopic insect-proofing composition, and more particularly a trioxane-containing composition which is useful in insect-proofing and damp proofing of clothing.
Abstract:
A process for preparing a ketazine useful as an intermediate for the synthesis of hydrazine is disclosed. The process comprises reacting an aliphatic or aromatic ketone with ammonia and hydrogen peroxide in the presence of a catalyst of an arsenic compound to produce a corresponding ketazine.
Abstract:
A working solution comprising anthraquinone and its derivatives, used for the production of hydrogen peroxide on becoming degraded by formation of non-effective anthraquinone is generated by an auto-oxidation process employing anthraquinone, which comprises:Contacting, at a temperature of below 130.degree.C., and in the presence of a catalyst comprising a metal selected from a platinum group and supported on a carrier, said degraded working solution, which comprises non-effective anthraquinone and tetrahydroanthraquinone with an olefinic compound whose hydrogenation product is gaseous at said contact temperature andSubsequently, contacting the thus treated working solution, at a temperature above 130.degree.C., and in the presence of a catalyst comprising a metal selected from the platinum group and supported on a carrier, with an olefinic compound whose hydrogenation product is gaseous at said contact temperature,Said method being characterized by the fact that at a temperature below 130.degree.C., the regeneration of non-effective anthraquinone is accelerated much faster than the dehydrogenation reaction of tetrahydroquinone and therefore, at a pont in time, when all non-effective anthraquinone has been converted to anthraquinone, the temperature can be raised above 130.degree.C. to permit dehydrogenation of said tetrahydroanthraquinone without incurring any impedance of the dehydrogenation reaction.
Abstract:
The adamantane derivatives of the present invention which are represented by the general formula (1): wherein X is a hydrogen atom, alkyl, halogen-containing alkyl, halogen, or hydroxyl-, halogen-, nitrile- or ether-containing hydrocarbyl, and a plurality of X groups, if any, may be the same or different from each other; n1 is an integer of 1 to 14; R1 to R4 may be the same or different from each other and are independently alkyl or halogen-containing alkyl; and Y1 and Y2 may be the same or different from each other and are independently a hydrogen atom or a group represented by the general formula (2): wherein R5 to R7 may be the same or different from each other and are independently a hydrogen atom, alkyl, halogen or halogen-containing alkyl, are excellent in optical properties, heat resistance and acid-dissociating property, and useful as crosslinking-type resins, optical materials such as optical fibers, light wave guides, optical disk substrates and photoresists as well as raw materials thereof, intermediate products of medicines or agricultural chemicals, and various other industrial products.
Abstract translation:由通式(1)表示的本发明的金刚烷衍生物:其中X是氢原子,烷基,含卤素的烷基,卤素或羟基,卤素,腈或醚的烃基,和 多个X组(如果有的话)可以相同或不同; n 1是1至14的整数; R 1至R 4可以彼此相同或不同,并且独立地为烷基或含卤素的烷基; 和Y 1和Y 2可以彼此相同或不同,并且独立地为氢原子或由通式(2)表示的基团:其中R' R 5和R 7可以相同或不同,并且独立地为氢原子,烷基,卤素或含卤素的烷基,光学性能,耐热性均优异 和酸解离性,并且可用作交联型树脂,光学材料如光纤,光波导,光盘基片和光致抗蚀剂以及其原料,药物或农药的中间产物,以及各种其它工业产品 。
Abstract:
Adamantanols are produced in high selectivity and high yields by hydroxylation of adamantane compounds in a specific two-phase solvent system of water and an organic solvent in the presence of a ruthenium compound and hypochlorous acid or its salt. Adamantanediols transfer into the organic phase by adding a specific alcohol to a reaction liquid containing the adamantanols, thereby facilitating extraction of the adamantanediols. The ruthenium compound transfers into the water phase by treating the reaction liquid with alkali prior to the addition of the alcohol and precipitates therein, thereby facilitating the recovery of the ruthenium compound.