Abstract: A process for hydrogenating oligonitriles which have at least two nitrile groups in the presence of a catalyst which, before commencement of the hydrogenation, is pretreated by contacting with a compound A which is selected from alkali metal carbonates, alkaline earth metal carbonates, ammonium carbonate, alkali metal hydrogencarbonates, alkaline earth metal hydrogencarbonates, ammonium hydrogencarbonate, alkaline earth metal oxocarbonates, alkali metal carboxylates, alkaline earth metal carboxylates, ammonium carboxylates, alkali metal dihydrogen phosphates, alkaline earth metal dihydrogen phosphates, alkali metal hydrogen phosphates, alkaline earth metal hydrogen phosphates, alkali metal phosphates, alkaline earth metal phosphates and ammonium phosphate, alkali metal acetates, alkaline earth metal acetates, ammonium acetate, alkali metal formates, alkaline earth metal formates, ammonium formate, alkali metal oxalates, alkaline earth metal oxalates and ammonium oxalate.

Abstract: A process for preparing a xylylenediamine by heterogeneously catalyzed hydrogenation of a phthalonitrile, wherein the hydrogenation is carried out in the presence of a cobalt skeletal catalyst, of an alkali metal hydroxide and of an alcohol and/or ether as the solvent, at an absolute pressure in the range from 1 to 100 bar and a temperature in the range from 40 to 150° C.

Abstract: The invention concerns a device (01) for aligning at least along one edge several stacked sheets (09) into a book, while maintaining the serial order of sheets, said device comprising an editing table (11), having on one of its sides, a front stop (13) for aligning the edges of the sheets (09). The invention is characterized in that upstream of the editing table (11) is provided a support plate (02), whereon the sheet (09) can be set into a bound book with non-aligned edges, and is further provided in the device (01), a sheet feeder (08, 04, 06) whereby the sheets can be conveyed from the support plate (02) towards the front stop (13) of the editing table (11), while forming a stream of subjacent webs.

Abstract: A process for preparing a xylylenediamine by heterogeneously catalyzed hydrogenation of a phthalonitrile, wherein the hydrogenation is carried out in the presence of a nickel catalyst, of water, of an alkali metal hydroxide and of an ether as a solvent, at an absolute pressure in the range from 1 to 100 bar, at a temperature in the range from 40 to 150° C. and without addition of ammonia.

Abstract: A process is described for preparing tetrahydrogeranylacetone in which pseudoionone, geranylacetone and/or dihydrogeranylacetone in a liquid phase, in which particles of a catalyst which is capable of preferentially hydrogenating carbon-carbon double bonds over carbon-oxygen double bonds are suspended, is conducted through a device which inhibits the transport of the catalyst particles in the presence of a hydrogen-containing gas.

Abstract: Process for preparing a propargyl alcohol of the formula I in which R1 is a C130-alkyl, C3-8-cycloalkyl, C2-20-alkoxyalkyl, C6-14-aryl, C7-20-alkoxyarl, C7-20-aralkyl, C7-20-alkylaryl radical or H, by reacting a corresponding aldehyde of the formula R1—CHO with acetylene in the presence of ammonia and a catalytic amount of an alkali metal hydroxide, alkaline earth metal hydroxide or alkali metal alkoxide in the range from 0.6 to 10 mol % based on the aldehyde used, and also processes for preparing an allyl alcohol of the formulae II and III starting from the propargyl alcohol I prepared in accordance with the invention.

Abstract: A continuous process for producing polyamides, their oligomers or mixtures thereof, if appropriate with further reaction products, comprises reaction of aminonitriles or dinitriles and diamines or mixtures thereof, if appropriate together with further polyamide-forming monomers and/or oligomers, with an aqueous medium composed of aqueous monomer and oligomer extracts obtained from polyamide production by extraction of the polymer with water in a reactor which has a vertical longitudinal axis and through which there is a flow substantially in the longitudinal direction wherein water and/or the aqueous medium are introduced into the reactor at two or more different locations along the vertical longitudinal axis, wherein the aqueous medium is introduced at one or more locations.

Abstract: A process is described for preparing tetrahydrogeranylacetone in which pseudoionone, geranylacetone and/or dihydrogeranylacetone in a liquid phase, in which particles of a catalyst which is capable of preferentially hydrogenating carbon-carbon double bonds over carbon-oxygen double bonds are suspended, is conducted through a device which inhibits the transport of the catalyst particles in the presence of a hydrogen-containing gas.

Abstract: The apparatus has at least one optical sensor (7, 8), which emits a light beam (13, 14), inclined at an angle in relation to the surface of the pallet (2), and irradiates the surface of the pallet (2) at a point of reflection, and supports (9, 10) with cylinders for displacing the point of reflection by a predetermined distance over the surface of the pallet (2).

Abstract: The invention relates to a stacking device for a machine for processing sheets, especially a sheet printing machine. Said device can be displaced between a first stacking position (02) and a second stacking position (03), and comprises carriers for a pallet receiving the stacked sheets in the first stacking position (02) and the second stacking position (03). The inventive device also comprises transport units (14, 16, 18) for transporting the pallets (09, 21) from each stacking position (02, 03) to a single pile of pallets (11), and for stacking the pallets (12, 19) in the pile of pallets (11).

Abstract: The apparatus has at least one optical sensor (7, 8), which emits a light beam (13, 14), inclined at an angle in relation to the surface of the pallet (2), and irradiates the surface of the pallet (2) at a point of reflection, and supports (9, 10) with cylinders for displacing the point of reflection by a predetermined distance over the surface of the pallet (2).

Abstract: A process for preparing a polyamide by reacting a mixture which comprises a monomer which has a nitrile group and has at least one other functional group capable of forming a carboxamide group, and comprises water, in the presence of titanium dioxide as catalyst, which comprises using titanium dioxide whose BET surface area, determined to the German standard DIN 66 131 volumetrically by the multipoint method, is in the range from 5 to 35 m2/g.

Abstract: The invention concerns a device (01) for aligning at least along one edge several stacked sheets (09) into a book, while maintaining the serial order of sheets, said device comprising an editing table (11), having on one of its sides, a front stop (13) for aligning the edges of the sheets (09). The invention is characterized in that upstream of the editing table (11) is provided a support plate (02), whereon the sheet (09) can be set into a bound book with non-aligned edges, and is further provided in the device (01), a sheet feeder (08, 04, 06) whereby the sheets can be conveyed from the support plate (02) towards the front stop (13) of the editing table (11), while forming a stream of subjacent webs.

Abstract: A pallet includes a support plate that is provided with supporting projections which are arranged on a main or primary side of the support plate, which is configured as a supporting surface that is intended for bearing a load. These projections are tapered toward free ends. The projections facilitate stacking of plural pallets spaced from each other either at a small spacing distance or at a large spacing distance. Recesses are formed on a secondary side of the support plate, opposite the supporting surface. These recesses receive the free ends of the projections.

Abstract: The invention relates to a stacking device for a machine for processing sheets, especially a sheet printing machine. Said device can be displaced between a first stacking position (02) and a second stacking position (03), and comprises carriers for a pallet receiving the stacked sheets in the first stacking position (02) and the second stacking position (03). The inventive device also comprises transport units (14, 16, 18) for transporting the pallets (09, 21) from each stacking position (02, 03) to a single pile of pallets (11), and for stacking the pallets (12, 19) in the pile of pallets (11).