Abstract: A connector assembly method which includes connecting an external connector fixed to a case of equipment and an internal connector on an internal substrate in the case. A lead extending inward of the case is provided at the external connector, a contact terminal is provided in a socket opening formed at the internal connector, and the connecting the external connector and the internal connector includes inserting a tip end side of the lead into the socket opening in such a manner that the socket opening of the internal connector and a tip end of the lead of the external connector relatively approach each other.

Abstract: A connector assembly method which includes connecting an external connector fixed to a case of equipment and an internal connector on an internal substrate in the case. A lead extending inward of the case is provided at the external connector, a contact terminal is provided in a socket opening formed at the internal connector, and the connecting the external connector and the internal connector includes inserting a tip end side of the lead into the socket opening in such a manner that the socket opening of the internal connector and a tip end of the lead of the external connector relatively approach each other.

Abstract: The present invention provides crystals of 6-[4-(4-pyridylamino)phenyl]-4,5-dihydro-3(2H)-pyridazinone hydrochloride trihydrate useful as a medicament for therapeutic treatment of cardiac failure, and the like; and a pharmaceutical composition comprising said crystals as an active ingredient. The crystal of the present invention has characteristic absorption peaks (2? degrees) at 12.9 (±0.2°) and 19.0 (±0.2°), for example, in powder X-ray diffractometry.

Abstract: The present invention provides crystals of 6-[4-(4-pyridylamino)phenyl]-4,5-dihydro-3(2H)-pyridazinone hydrochloride trihydrate useful as a medicament for therapeutic treatment of cardiac failure, and the like; and a pharmaceutical composition comprising said crystals as an active ingredient.

Abstract: Cyclohexene is separated from a mixture of cyclohexene and at least one of cyclohexane and benzene by subjecting the mixture to extractive distillation in the presence of an extraction solvent the formula: ##STR1## wherein R.sup.1 and R.sup.2 each is a C.sub.1-10 alkyl group or hydrogen, and n is an integer of from 2-4, thereby preparing a fraction rich in cyclohexene.

Abstract: An oligomerization of .alpha.-olefins is carried out in a solvent using a chromium-based catalyst system comprising at least (a) a chromium compound, (b) at least one nitrogen-containing compound selected from amines, amides and imides, and (c) an alkylaluminum compound, and the catalyst components and by-product polymers are recovered simultaneously from the reaction solution. Such process is an industrially advantageous process for producing .alpha.-olefin oligomers by using a chromium-based catalyst, and is simple and capable of efficiently recovering the by-product polymers and the catalyst components simultaneously.

Abstract: A C.sub.9 alcohol mixture for plasticizer obtained by the hydroformylation and hydrogenation of a C.sub.8 olefin mixture as the starting material obtained by the dimerization of a butene fraction, said alcohol mixture comprising from 8 to 50% by weight of a first group component having a retention time not longer than the retention time of isobutyl n-caprylate, from 8 to 40% by weight of a second group component having a retention time longer than that of isobutyl n-caprylate and not longer than that of methyl n-caprate and from 20 to 80% by weight of a third group component having a retention time longer than that of methyl n-caprate, as divided into such three components by gas chromatography using a capillary column packed with a polyethylene glycol having a number average molecular weight of 15,000 to 20,000 as an isomer separating agent.

Abstract: A method for recovering rhodium comprising the steps of: adding a basic compound to an organic solution containing a rhodium complex containing at least one type of organophosphorus compound as a ligand and an organophosphorus compound, combusting the resultant mixture to ash under a controlled temperature of less than 1,000.degree. C.; and cleaning the ash using a cleaning solution containing a reducing agent.

Abstract: A C.sub.9 alcohol mixture used to make a plasticizer obtained by the hydroformylation and hydrogenation of a C.sub.8 olefin mixture as the starting material obtained by the dimerization of a butene fraction, said alcohol mixture comprising from 8 to 50% by weight of a first group component having a retention time not longer than the retention time of isobutyl n-caprylate, from 8 to 40% by weight of a second group component having a retention time longer than that of isobutyl n-caprylate and not longer than that of methyl n-caprate and from 20 to 80% by weight of a third group component having a retention time longer than that of methyl n-caprate, as divided into such three components by gas chromatography using a capillary column packed with a polyethylene glycol having a number average molecular weight of 15,000 to 20,000 as an isomer separating agent.

Abstract: A C.sub.10 alcohol mixture for plasticizer, which comprises 2-propylheptanol (hereinafter referred to as "PRH"), an alcohol having a structure of condensation product of n-valeraldehyde and 2-methylbutyraldehyde (hereinafter referred to as "Component A"), an alcohol having a structure of condensation product of n-valeraldehyde and 3-methylbutyraldehyde (hereinafter referred to as "Component B"), an alcohol having a structure of condensation product of n-valeraldehyde and pivalaldehyde (hereinafter referred to as "Component C"), and other C.sub.10 alcohols (hereinafter referred to as "Component D"), characterized in that the respective components are present in the following molar ratios:Component A/PRH=0.04-1Component B/PHR=0.002-0.3Component C/PRH=0.001-0.3Component D/PRH.ltoreq.0.3.

Abstract: A process for the hydroformylation of an olefin, which comprises hydroformylating an olefinic compound by reacting it with carbon monoxide and hydrogen in a hydroformylation reaction zone in the presence of a catalyst solution containing rhodium and an oxide of an organic trivalent phosphorus compound to form an aldehyde having a carbon number larger by one than that of the olefinic compound; adding an organic trivalent phosphorus compound to the reaction mixture, followed by distillation to separate a distillate containing the aldehyde from a high-boiling residue containing rhodium; oxidizing the high-boiling residue at the same time as or subsequent to the distillation to convert the organic trivalent phosphorus compound to its oxide; and recycling the oxidized residue to the hydroformylation reaction zone as a recycling catalyst solution, wherein the hydroformylation reaction is conducted under a condition such that the proportion of an alcohol content supplied as contained in the recycling catalyst soluti

Abstract: A blow-molded multi-ply vessel having excellent physical properties and good appearance which comprises two or more kinds of thermoplastic resins, at least one of which is a thermoplastic polyester resin, said vessel having a multi-ply structure of three or more layers at least at the thin wall part of the body thereof and a single layer structure at least at the open end of the mouth part thereof, and at least the thin wall part of the body being biaxially orientated. The vessel is produced by sequently and alternatively injecting two or more kinds of molten thermoplastic resins into one mold with shifting injection timing from a molding machine having plural injection cylinders with one mold closing operation to form a multi-ply parison and then blow-molding the parison at an orientating temperature.

Abstract: A multi-ply vessel which comprises an inner layer (A) composed of a thermoplastic polyester resin, a middle layer (B) composed of a metaxylylene group-containing polyamide resin and an outer layer (C) composed of a synthetic resin having impermeability to moisture, said inner layer (A) and middle layer (B) being oriented in at least one direction at the thin part of the vessel wall. This vessel is produced by orienting a parison having a multi-ply structure of the inner layer (A), the middle layer (B) and the outer layer (C) in a draw ratio of 1 to 4 times in longitudinal direction and of 2 to 7 times in crosswise direction at a temperature of from Tg+15.degree. C. to 2(Tg)+15.degree. C. (wherein Tg is the glass transition temperature of the thermoplastic polyester resin).

Abstract: A process for producing a hollow vessel having a frosted glass-like surface which comprises molding a crystalline thermoplastic polyester copolymer comprising units of ethylene terephthalate as the main component into a transparent parison, crystallizing at least the surface layer portion of the parison and then subjecting it to blow molding.