Abstract: The object of the present invention is to provide a process capable of producing cycloalkanol and/or cycloalkanone in excellent selectivity by oxidizing cycloalkane in a good degree of conversion. The present invention relates to a process for producing cycloalkanol and/or cycloalkanone, which comprises oxidizing cycloalkane with oxygen at 25 to 140° C. in the presence of mesoporous silica containing the group 8 and/or 9 element in the periodic table, wherein the content of phosphorus atom in the mesoporous silica is 0 to 4 mol % based on silicon atom. Said element is preferably cobalt and said mesoporous silica is preferably MCM-41.

Abstract: In case of oxidizing cycloalkane with oxygen, the catalyst to be used is a catalyst obtained by supporting metals of Groups 5 to 10 of the Periodic Table on a carrier, the carrier being subjected to a catalytic treatment with an organosilicon compound. The metal is preferably vanadium, chromium, manganese, iron, cobalt, ruthenium or palladium, while the carrier is preferably an oxide of magnesium, aluminum, silicon, titanium or zirconium.

Abstract: A clasp of the present invention comprises: a base connected to at least one end of looping member which has an upper opening at an upper side thereof and which has a front opening at a front side thereof; an arm which is supported by the edge of the base in a rotatable manner, which has a nail portion at a rear end thereof, and which makes up a loop by closing the arm; a push button embedded within the upper opening of the base and communicated with the nail portion of the arm; a first spring which applies a resilient force to the push button in the direction that the push button is projecting outwardly; and a second spring which applies a resilient force to the arm in the direction of opening the arm.

Abstract: The invention provides a method for producing ?-caprolactam comprising the steps of: a reaction process which subjects cyclohexanone oxime to a Beckmann rearrangement reaction in the presence of a solid catalyst; and a catalyst regeneration process which regenerates the solid catalyst used in the reaction process by heat treatment under an atmosphere comprising an oxygen-containing gas, wherein the solid catalyst heat-treated in the catalyst regeneration process is used in the reaction process, the carbon contents in the solid catalyst in the reaction process and the catalyst regeneration process are maintained in a range of 0.5 to 2% by weight, and the nitrogen contents in the solid catalyst in the reaction process and the catalyst regeneration process are maintained in a range of 0.01 to 0.2% by weight. According to the invention, ?-caprolactam can be produced in a high production yield for a long period of time by enhancing persistence of the catalytic activity for producing ?-caprolactam.

Abstract: The present invention provides a method for manufacturing a zeolite comprising following steps of: (1): calcining crystals obtained by hydrothermal synthesis reaction of a silicon compound; (2): contact treating a calcined product obtained by the step (1) with an aqueous solution including an amine and/or a quaternary ammonium compound; (3): calcining a treated product obtained by the step (2); and (4): contact treating the calcined product obtained by the step (3) with an aqueous solution including ammonia and/or an ammonium salt. According to the present invention, a method is also provided wherein ?-caprolactam is manufactured by Beckmann rearrangement reaction of cyclohexanone oxime in a gaseous phase in the presence of the zeolite manufactured by the above-described method.

Abstract: A method for producing ?-caprolactam and a method for reactivating a zeolite catalyst for the production are provided. In the reactivation step, a zeolite catalyst is allowed to contact a gas containing a carboxylic acid, water and a compound selected from ammonia and amines. In accordance with the present invention, the catalytic activities of a zeolite catalyst used for the Beckmann rearrangement reaction of cyclohexanone oxime can be effectively restored. Consequently, ?-caprolactam may be produced with a high production yield for a long period of time by reusing the catalyst by the method described above.

Abstract: The present invention provides a method for manufacturing a zeolite comprising following steps of: (1): calcining crystals obtained by hydrothermal synthesis reaction of a silicon compound; (2): contact treating a calcined product obtained by the step (1) with an aqueous solution including an amine and/or a quaternary ammonium compound; (3): calcining a treated product obtained by the step (2); and (4): contact treating the calcined product obtained by the step (3) with an aqueous solution including ammonia and/or an ammonium salt. According to the present invention, a method is also provided wherein ?-caprolactam is manufactured by Beckmann rearrangement reaction of cyclohexanone oxime in a gaseous phase in the presence of the zeolite manufactured by the above-described method.

Abstract: The invention provides a method for producing ?-caprolactam comprising the steps of: a reaction process which subjects cyclohexanone oxime to a Beckmann rearrangement reaction in the presence of a solid catalyst; and a catalyst regeneration process which regenerates the solid catalyst used in the reaction process by heat treatment under an atmosphere comprising an oxygen-containing gas, wherein the solid catalyst heat-treated in the catalyst regeneration process is used in the reaction process, the carbon contents in the solid catalyst in the reaction process and the catalyst regeneration process are maintained in a range of 0.5 to 2% by weight, and the nitrogen contents in the solid catalyst in the reaction process and the catalyst regeneration process are maintained in a range of 0.01 to 0.2% by weight. According to the invention, ?-caprolactam can be produced in a high production yield for a long period of time by enhancing persistence of the catalytic activity for producing ?-caprolactam.

Abstract: A method for producing ?-caprolactam and a method for reactivating a zeolite catalyst for the production are provided. In the reactivation step, a zeolite catalyst is allowed to contact a gas containing a carboxylic acid, water and a compound selected from ammonia and amines. In accordance with the present invention, the catalytic activities of a zeolite catalyst used for the Beckmann rearrangement reaction of cyclohexanone oxime can be effectively restored. Consequently, ?-caprolactam may be produced with a high production yield for a long period of time by reusing the catalyst by the method described above.

Abstract: A clasp comprising a piston member, cylinder member, and a member for attaching and detaching said piston member to the cylinder member. The clasp of the present invention comprises an elastic member which apply a resilient force to the piston member in the direction that the piston member is separated from said cylinder member; a lock pin projected on either surface of the piston member and the cylinder member contact with each other in substantially vertical direction to the remaining surface so that projection elastic force is applied in a movable manner: a W-shaped or M-shaped guide groove including a concave portion for inserting the lock pin and having a route for directing the movement of the lock pin, which comprises a first bent portion, a second bent portion, and a third bent portion from the inlet and outlet of the route; and a member for directing the movement of the lock pin.

Abstract: A clasp comprising a piston member, cylinder member, and a member for attaching and detaching said piston member to the cylinder member. The clasp of the present invention comprises an elastic member which apply a resilient force to the piston member in the direction that the piston member is separated from said cylinder member; a lock pin projected on either surface of the piston member and the cylinder member contact with each other in substantially vertical direction to the remaining surface so that projection elastic force is applied in a movable manner: a W-shaped or M-shaped guide groove including a concave portion for inserting the lock pin and having a route for directing the movement of the lock pin, which comprises a first bent portion, a second bent portion, and a third bent portion from the inlet and outlet of the route; and a member for directing the movement of the lock pin.

Abstract: A clasp device for accessories includes: a locking element provided with an locking hole or locking groove; and a clasp for the engagement with the locking element. The clasp comprises: a receiving member into which the locking element is inserted; a stopper member comprising a U-shaped plate and a push button and having an open space for receiving the receiving member; a coil spring for urging the inner lower end of the U-shaped plate into the inner region of the receiving member; and a positioning casing and a cover lid forming a clasp body. The receiving member is provided with an engaging opening through which the inner lower end of the U-shaped plate protrudes into the inner region of the receiving member. The push button of the stopper member is in the form of a hollow cylinder accommodating therein the coil spring.

Abstract: A single-phase three-wire type transformer which forms secondary coils by duplex coils winding two conductors in parallel according to the division intersection connection and can reduce currents circulating inside of a circuit of the transformer, thereby reducing the loss in the transformer. Coils A and B are formed in two opposing locations of a core (1). The coils A and B are configured so that two secondary coils and a primary coil are overlapped and wound in sequence from the inside of the core (1) in three layers, respectively. Each of the secondary coils provided by winding two conductors of small diameter in parallel condition on the core (1). One duplex coil connects the two parallel winding conductors in series with the other duplex coil, i.e.

Abstract: An electrodeposition coating process of a photoresist for printed circuit board which comprises electrodeposition coating on a conductive surface a photosensitive electrodeposition coating composition (A), and thereafter further electrodeposition coating on the resultant coated plate an electrodeposition coating composition (B) composed chiefly of water-soluble or water-dispersible resin having a glass transition temperature (Tg) not lower than 20.degree. C.