Abstract: A method for recovering a Group VIII metal solid complex from an organic compound-containing solution containing a Group VIII metal complex, wherein the Group VIII metal complex is precipitated in the presence of a trialkyl phosphine of the following formula (I): ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 is an alkyl group and they may be the same or different from one another, and the sum of the carbon numbers of R.sub.1, R.sub.2 and R.sub.3 is at least 42.

Abstract: A process for dimerizing an aromatic halogen compound is disclosed, which comprises the step of: subjecting an aromatic halogen compound having at least one halogen atom bonded to an aromatic nucleus carbon to a dehalogenation-dimerization reaction in the presence of a catalyst, water, a reducing agent, and a halogen acceptor, the catalyst comprising a carrier supported thereon palladium and iron.

Abstract: A method for controlling combustion in a furnace into which combustible material, e.g., urban refuse, industrial waste, and a controlled quantity of combustion air are fed. The furnace includes a mixing/stirring region where unburnt gas and secondary combustion air are mixed and stirred. A part of exhaust gas derived from the furnace is blown into the mixing/stirring region depending on variation in the quantity of the secondary combustion air, and a flow rate of mixture gas consists of the exhaust gas and the secondary combustion air to be fed into the mixing/stirring region is maintained within a predetermined region so that effective combustion takes place.

Abstract: In a shutter opening device including a lever member to be operated according to an inserting force of a disc cartridge which lever member operates to open a shutter of the disc cartridge in a direction perpendicular to an inserting direction of the disc cartridge, the lever member is provided at its contact end portion with an inclined surface adapted to contact a corner of the shutter.

Abstract: An improving method for producing alkadienols by reaction of conjugated alkadiene and water in the presence of carbon dioxide and a catalyst composed of a palladium compound and phosphine (or phosphite), wherein the by-products having high boiling point and the palladium catalyst are efficiently separated from the reaction product for re-use without impairing their effectiveness as the catalyst.

Abstract: A method of dehalogeno-dimerizing an aromatic halide compound substituted by at least one halogen atom substituted on the aromatic ring using a palladium catalyst on support in the presence of water, a reducing agent and a halogen acceptor is disclosed. The method is characterized by using the palladium catalyst on support immersed in a hydrohalogenic acid prior to the dehalogeno-dimerization reaction.

Abstract: A machine tool with a vertically reciprocating spindle head has an automatic tool changer including a rotatingly indexable tool support connected to the machine tool frame and vertically movable independently of the spindle head, a first cam-and-crank mechanism activated by spindle head vertical movement to move the tool support with the spindle head during a portion of the tool changing operation, a second cam-and-crank mechanism also activated by spindle head vertical movement for opening and closing a tool holder on the tool support during another portion of the tool changing operation, and a vertical stop for preventing vertical movement of the tool support with the spindle head into the machining region.

Abstract: A process for dehalogeno-dimerization reaction of an aromatic halide compound which comprises dimerizing aromatic halide compound having at least one halogen atom attached to a carbon atom in the aromatic nucleus, and optionally having a substituent other than the halogen atom, in the presence of a platinum group metal catalyst, carbon monoxide, and an alkali metal compound and/or an alkaline earth metal compound.

Abstract: A machine tool with a vertically reciprocating spindle head has an automatic tool changer including a rotatingly indexable tool support connected to the machine tool frame and vertically movable independently of the spindle head, a first cam-and-crank mechanism activated by spindle head vertical movement to move the tool support with the spindle head during a portion of the tool changing operation, a second cam-and-crank mechanism also activated by spindle head vertical movement for opening and closing a tool holder on the tool support during another portion of the tool changing operation, and a vertical stop for preventing vertical movement of the tool support with the spindle head into the machining region.

Abstract: A hydroformylation process which comprises hydroformylating an olefinic compound by reacting it with water gas in a catalyst solution containing rhodium and an oxide of an organic trivalent phosphorus compound; adding an organic trivalent phosphorus compound to the reaction mixture, followed by distillation to separate a distillate containing the hydroformylation product 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.

Abstract: A set point control method and apparatus for controlling many set points of an electronic apparatus by using a simple switch is disclosed. A switch condition is repeatedly detected, and a difference of the switch conditions is obtained when a former switch condition is different from the present switch condition. If a switch is a rotary digital switch for selecting one of a plurality of digital words, the difference is defined by the rotation direction of the switch and a difference of the former and present digital words. A memory stores a plurality of set information, and is addressed in accordance with the difference for controlling the set point of the electronic apparatus.