Abstract: A system for operating a door lock (14) and a latching device (16), which can be arrested in a positive-locking manner, of a sliding door (10), said latching device preventing the sliding door (10) in its open position from sliding back. The operation of the door lock (14) and latching device (16) takes place mechanically via connecting elements, and the logical closing functions, are integrated in the door lock (14) which is situated remote from the door handles. In order to avoid very long connecting elements with cumulative tolerances, the connecting elements (22, 24) between the door handles and the door lock (14) have driver elements (40, 42) which act via a driven element (32, 44) on a connecting element (28) connected to the latching device (16).

Abstract: An oxime is synthesized by ammoximation of a carbonyl compound. In stage (i) of the process, a carbonyl compound containing 6 to 20 C atoms is reacted with ammonia and hydrogen peroxide in the presence of a) an organic solvent that is a1) at least partly water-soluble, a2) stable under ammoximation conditions, a3) has a boiling point of higher than 100° C. and/or is capable of forming a two-phase azeotrope with water, and b) a titanium-containing heterogeneous catalyst. After the reaction, the catalyst is separated from the reaction mixture. The oxime is crystallized and separated from the reaction mixture. Water is removed from the remaining mother liquor, provided the mother liquor is a two-phase system in which one of the phases is an aqueous phase. Water or a water-containing two-phase azeotrope is distilled off from the mother liquor, while the distillation bottoms and, optionally, the predominantly organic phase of the azeotrope are recycled to stage (i).

Abstract: The epoxidation of cyclic, at least monounsaturated alkenes is conducted by a process, which comprises conducting the epoxidation of a cyclic, at least monounsaturated alkene in the presence of an oxidant in a reaction medium that contains at least 1% by weight of the saturated cyclic alkane corresponding to the cyclic, at least monounsaturated alkene. In a preferred embodiment the reaction medium contains at least 2.5% by weight of the saturated cyclic alkane corresponding to the cyclic, at least monounsaturated alkene.

Abstract: Settling times of a catalyst in the epoxidation of a cyclic, at least monounsaturated alkene are improved by a method, comprising epoxidizing a cyclic, at least monounsaturated alkene having from 8 to 20 carbon atoms in the ring in a reaction medium containing an oxidant and a catalyst system comprising at least one metal of Groups 4, 5 and 6 of the Periodic Table of the Elements, phosphoric acid and a phase transfer catalyst and a cyclic alkane having from 8 to 20 carbon atoms in the ring, which corresponds to the alkene reactant, as settling accelerator in the epoxidation reaction.

Abstract: A process for preparing cyclododecene by selective gas-phase hydrogenation of at least one starting material selected from cyclododecatriene, cyclododecadiene and mixtures thereof, wherein the starting material present in the gas phase is hydrogenated in the presence of a catalyst in a fixed-bed reactor and the Bodenstein number for the process is greater than 100.

Abstract: An oxime is synthesized by ammoximation of a carbonyl compound. In stage (i) of the process, a carbonyl compound containing 6 to 20 C atoms is reacted with ammonia and hydrogen peroxide in the presence of a) an organic solvent that is a1) at least partly water-soluble, a2) stable under ammoximation conditions, a3) has a boiling point of higher than 100° C. and/or is capable of forming a two-phase azeotrope with water, and b) a titanium-containing heterogeneous catalyst. After the reaction, the catalyst is separated from the reaction mixture. The oxime is crystallized and separated from the reaction mixture. Water is removed from the remaining mother liquor, provided the mother liquor is a two-phase system in which one of the phases is an aqueous phase. Water or a water-containing two-phase azeotrope is distilled off from the mother liquor, while the distillation bottoms and, optionally, the predominantly organic phase of the azeotrope are recycled to stage (i).

Abstract: Continuous process for preparing polyoxymethylene homo- or copolymers by bulk polymerization of the monomers in the presence of cationic initiators, and also, if desired, in the presence of regulators, where during the polymerization both the monomers and the polymer are present in molten form and, if desired, the polymer is then deactivated, and the melt is discharged, cooled and pelletized, which comprises discharging, cooling and pelletizing the polymer at an elevated pressure and in the presence of a liquid.

Abstract: The epoxidation of cyclic, at least monounsaturated alkenes is conducted by a process, which comprises conducting the epoxidation of a cyclic, at least monounsaturated alkene in the presence of an oxidant in a reaction medium that contains at least 1% by weight of the saturated cyclic alkane corresponding to the cyclic, at least monounsaturated alkene. In a preferred embodiment the reaction medium contains at least 2.5% by weight of the saturated cyclic alkane corresponding to the cyclic, at least monounsaturated alkene.

Abstract: Settling times of a catalyst in the epoxidation of a cyclic, at least monounsaturated alkene are improved by a method, comprising epoxidizing a cyclic, at least monounsaturated alkene having from 8 to 20 carbon atoms in the ring in a reaction medium containing an oxidant and a catalyst system comprising at least one metal of Groups 4, 5 and 6 of the Periodic Table of the Elements, phosphoric acid and a phase transfer catalyst and a cyclic alkane having from 8 to 20 carbon atoms in the ring, which corresponds to the alkene reactant, as settling accelerator in the epoxidation reaction.

Abstract: A process for the work-up of a reaction mixture formed by ammoximation of a ketone, in particular an alkanone or cycloalkanone, by means of hydrogen peroxide and ammonia in homogeneous solution over a titanium-containing catalyst. It comprises the substeps removal of the catalyst, selective separation of the oxime formed in the ammoximation from the reaction mixture, removal of water of reaction and recirculation of the solvent. The work-up is carried out using at least one membrane separation step and is also successful in the case of incomplete ketone conversion and in the presence of dissolved salts.

Abstract: Degradation acids obtained in the synthesis of carboxylic acids, in particular dicarboxylic acids, having from 8 to 16 carbon atoms may be isolated by separating the degradation acids in the form of a solid from the crude reaction mixture, then washing the degradation acids in the form of an oil with water at an elevated temperature. The resulting degradation acids having low oxidant and metal contents, and the metal catalyst may be recirculated back to the process.

Abstract: The present invention relates to a process for working up an ammoximation reaction mixture, by separating a catalyst from the reaction mixture, removing the ketone oxime product, discharging the water of the reaction, and recirculating a solvent, where the ketone oxime formed is removed in a liquid phase with at least one liquid-liquid extraction in a ternary solvent system.

Abstract: A process for the work-up of a reaction mixture formed by ammoximation of a ketone, in particular an alkanone or cycloalkanone, by means of hydrogen peroxide and ammonia in homogeneous solution over a titanium-containing catalyst. It comprises the substeps removal of the catalyst, selective separation of the oxime formed in the ammoximation from the reaction mixture, removal of water of reaction and recirculation of the solvent. The work-up is carried out using at least one membrane separation step and is also successful in the case of incomplete ketone conversion and in the presence of dissolved salts.

Abstract: A power-assisted closing device (1) for doors, flaps, folding tops or roofs of vehicles, in particular passengers cars, having a pivotably mounted rotary latch (2) which interacts with a fastening peg, a detent pawl (7) which releasably locks the rotary latch (2), and an actuating drive which acts via a disk cam (13) on the rotary latch (2) and the detent pawl (7) to effect an unlocking or locking procedure, wherein a pivotable stop element (17) is arranged on the rotary latch (2) and a pivotable stop element (20) is arranged on the detent pawl (7), the stop element (17, 20) interacting with the disk cam (13) in the unlocking or locking procedure.

Abstract: The present invention relates to a process for working up an ammoximation reaction mixture, by separating a catalyst from the reaction mixture, removing the ketone oxime product, discharging the water of the reaction, and recirculating a solvent, where the ketone oxime formed is removed in a liquid phase with at least one liquid-liquid extraction in a ternary solvent system.

Abstract: A locking mechanism (10) is produced for holding a sliding door in the open position and has a Bowden cable (22) which acts on its locking element (20), a moving-carriage support (14) and a moving carriage (18), which move relative to one another during the closing of the door. In order to disengage the door handles from the locking mechanism when the sliding door is closed and therefore in order to reduce the actuating forces for unlocking the door lock, the moving-carriage support (14), during the closing movement, shifts a driver (34) which is guided on the moving carriage (14) and carries along the locking element (20) in the direction of its unlocking position. By this, the Bowden cable (22) is moved in its actuating direction, thereby enabling the door handles to be disengaged.

Abstract: Continuous process for preparing polyoxymethylene homo- or copolymers by bulk polymerization of the monomers in the presence of cationic initiators, and also, if desired, in the presence of regulators, where during the polymerization both the monomers and the polymer are present in molten form and, if desired, the polymer is then deactivated, and the melt is discharged, cooled and pelletized, which comprises discharging, cooling and pelletizing the polymer at an elevated pressure and in the presence of a liquid.

Abstract: A condensation apparatus for condensing a gas on a surface, where the surface for condensing the gas has elevations of average height of from 50 nm to 1 mm, and with an average separation of from 50 nm to 1 mm, allows increased condensation efficiency. The apparatus is used for condensing organic or inorganic gases and may be incorporated into distillation systems.

Abstract: A locking mechanism (10) is produced for holding a sliding door in the open position and has a Bowden cable (22) which acts on its locking element (20), a moving-carriage support (14) and a moving carriage (18), which move relative to one another during the closing of the door. In order to disengage the door handles from the locking mechanism when the sliding door is closed and therefore in order to reduce the actuating forces for unlocking the door lock, it is proposed that the moving-carriage support (14), during the closing movement, shifts a driver (34) which is guided on the moving carriage (14) and carries along the locking element (20) in the direction of its unlocking position. By this means, the Bowden cable (22) is moved in its actuating direction, thereby enabling the door handles to be disengaged.

Abstract: A closure device, especially for vehicle doors, possesses a rotary latch interacting with a closure pin, a releasable ratchet for arresting the door, and a motor-driven shutting aid, which moves the door into the closed position. A problem from safety aspects is activating the shutting aid if fingers or articles are still located between the door and the bodywork. In order to reduce the risk of injury or damage, when the release mechanism is actuated, the force flow between the drive of the shutting aid and the door to be closed is simultaneously mechanically interrupted. As a result of this measure, the rotary latch is immediately released and the door springs open.