Abstract: A process for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the process comprising subjecting the stream of crude isoprenol or an isoprenol containing fraction thereof to distillation in a low-boiler separation tower operated at a pressure of 2.5 bara or higher to obtain a distillate stream containing aqueous formaldehyde and a bottoms stream containing isoprenol. The process of the invention allows for obtaining isoprenol essentially free of formaldehyde. Further provided is a plant for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the plant comprising a first low-boiler separation tower, a second low-boiler separation tower, and a finishing tower.

Abstract: A parking lock for motor vehicle, including a parking lock wheel that can be connected to a shaft of the motor vehicle in a rotationally fixed manner, at least one blocking element, and an actuator, by which the blocking element is movable between at least one blocking position securing the parking lock wheel against rotation, and at least one release position releasing the parking lock wheel for a rotation, comprising at least one spring element, which by the actuator is to be tensioned during the moving of the blocking element into the blocking position, thus providing a spring force in the blocking position of the blocking element, by which the actuator is to be supported during the movement of the blocking element into the release position.

Abstract: A shift device for a motor vehicle transmission, in particular for a motor vehicle automatic transmission, includes a shift shaft operatively connected to the transmission and a shift lever for actuating the shift shaft, wherein the shift shaft and the shift lever are connected to one another by way of a spline connection. The spline connection is formed with rotational play, permitting a restricted rotational free travel of the shift shaft when the shift lever is stationary. A motor vehicle transmission having a shift device of this type is also disclosed.

Abstract: A process for removing acid gases from a hydrocarbonaceous fluid stream or an oxygen-comprising fluid stream in which the fluid stream is contacted with an aqueous solution which is essentially free from inorganic basic salts and comprises (i) at least one amine and (ii) at least one metal salt of an aminocarboxylic acid and/or an aminosulfonic acid. Conjoint use of the aminocarboxylic and/or aminosulfonic salt reduces the coabsorption of hydrocarbons or oxygen without significantly impairing the absorption rate at which acid gases are absorbed, without significantly reducing the absorption capacity of the solution for acid gases, and without significantly increasing the energy demand required for regeneration.

Abstract: The invention relates to a drive assembly on a twin-clutch transmission for motor vehicles, including two clutches which are axially connected in succession in a transmission housing and are positioned between spaced-apart end walls of the transmission housing and which have each a preferably drum-shaped drive element which is driven by an input shaft of the transmission, with the clutches being in driving relationship, preferably alternatingly, via two preferably pot-shaped output elements with two output shafts in coaxial arrangement to the input shafts. According to the invention, the input shaft (14) which is rotatably mounted in the region of a first end wall (12a) is guided up to the second end wall (10a) located in opposition to the first end wall (12a) and is rotatably mounted there indirectly via the output shafts (24, 26) which are also rotatably mounted in the region of the second end wall (10a).

Abstract: A shift device for a motor vehicle transmission, in particular for a motor vehicle automatic transmission, includes a shift shaft operatively connected to the transmission and a shift lever for actuating the shift shaft, wherein the shift shaft and the shift lever are connected to one another by way of a spline connection. The spline connection is formed with rotational play, permitting a restricted rotational free travel of the shift shaft when the shift lever is stationary. A motor vehicle transmission having a shift device of this type is also disclosed.

Abstract: The invention relates to a drive assembly on a twin-clutch transmission for motor vehicles, including two clutches which are axially connected in succession in a transmission housing and are positioned between spaced-apart end walls of the transmission housing and which have each a preferably drum-shaped drive element which is driven by an input shaft of the transmission, with the clutches being in driving relationship, preferably alternatingly, via two preferably pot-shaped output elements with two output shafts in coaxial arrangement to the input shafts. According to the invention, the input shaft (14) which is rotatably mounted in the region of a first end wall (12a) is guided up to the second end wall (10a) located in opposition to the first end wall (12a) and is rotatably mounted there indirectly via the output shafts (24, 26) which are also rotatably mounted in the region of the second end wall (10a).

Abstract: An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution of a) of at least one metal salt of an aminocarboxylic acid, and b) of at least one acid promoter, wherein the molar ratio of b) to a) is in the range from 0.0005 to 1.0. The acid promoter is selected from mineral acids, carboxylic acids, sulfonic acids, organic phosphonic acids and partial esters thereof. The absorption medium, compared with absorption media based on amino acid salts, has a reduced regeneration energy requirement without significantly reducing the absorption capacity of the solution for acid gases. In a process for removing acid gases from the fluid stream, the fluid stream is brought into contact with the absorption medium.

Abstract: The invention relates to an absorbent, comprising an aqueous solution (A) of at least one amino acid salt of the formula (I), wherein R1 and R2 independently from each other represent alkyl or hydroxyalkyl, R is hydrogen, alkyl or hydroxyalkyl, or a group R together with R1 is alkylene, M is an alkali metal, and n an integer from 1 to 6, and (B) of at least one primary alkanolamine, which is substantially free of inorganic alkaline salts. The absorbent is used in a method for removing carbon dioxide from a gas flow, particularly combustion exhaust gases. Preferred amino acid salts (A) are N,N-dimethylamino acetic acid potassium salt, N,N-diethylamino acetic acid potassium salt and N-ethyl-N-methylamino acetic acid-potassium salt. Preferred alkanolamines (B) are 2-aminoethanol, 3-aminopropanol, 4-aminobutanol, 2-aminobutanol, 5-aminopentanol, 2-aminopentanol and 2-(2-aminoethoxy)ethanol.

Abstract: A process for removing acid gases from a hydrocarbonaceous fluid stream or an oxygen-comprising fluid stream in which the fluid stream is contacted with an aqueous solution which is essentially free from inorganic basic salts and comprises (i) at least one amine and (ii) at least one metal salt of an aminocarboxylic acid and/or an aminosulfonic acid. Conjoint use of the aminocarboxylic and/or aminosulfonic salt reduces the coabsorption of hydrocarbons or oxygen without significantly impairing the absorption rate at which acid gases are absorbed; without significantly reducing the absorption capacity of the solution for acid gases, and without significantly increasing the energy demand required for regeneration.

Abstract: In a method for removing acid gases from a fluid stream, the fluid stream, which is in contact with an absorption medium within an absorber, is passed through a first absorption zone in the absorber to remove a majority of acid gases from the fluid stream. The fluid stream is susequently passed through a second absorption zone in the absorber to further remove acid gases from the fluid stream. The loaded absorption medium is passed into a first regeneration zone to obtain a partially regenerated absorption medium, and a part of the partially regenerated absorption medium is passed into the first absorption zone. The other part of the partially regenerated absorption medium is passed into a second regeneration zone to obtain a regenerated absorption medium. A part of the regenerated absorption medium is passed into the first absorption zone and the other part is passed into the second absorption zone.

Abstract: A method of forming an integrated deep and shallow trench isolation structure comprises depositing a hard mask on a film stack having a plurality of layers formed on a substrate such that the hard mask is deposited on a furthermost layer from the substrate, imprinting a first pattern into the hard mask to define an open end of a first trench, imprinting a second pattern into the hard mask to define an open end of a second trench, and etching into the film stack the first trench to a first depth and the second trench to a second depth such that the first trench and the second trench each define a blind aperture in the surface of the film stack.

Abstract: A description is given of an absorption medium for removing carbon dioxide from a gas stream, which comprises an aqueous solution of at least one amine and at least one aminocarboxylic acid and/or aminosulfonic acid. The concomitant use of an aminocarboxylic acid or aminosulfonic acid reduces the energy required for regeneration of the absorption medium.

Abstract: A column for bringing two fluids into contact, which column possesses an essentially cylindrical shell which, between a top end and a bottom end of the column, surrounds an interior space in which packings are axially spaced apart along a longitudinal axis extending from the top to the bottom end of the column. The packings, at the periphery thereof, are bounded by side walls which are inclined to the longitudinal axis of the column in the direction of the bottom end of the column. The column is suitable for absorption and dewatering plants which are installed on floating platforms and ships. A liquid stream leading away from the column wall is avoided even in the event of an inclined position of the column. The formation of “dry” packing zones is thereby prevented.

Abstract: The present invention relates to an apparatus for the tangential introduction of a gas-loaded liquid stream into the top of a column in which gas and liquid are separated. Entry into the column top proceeds through a conventional radially arranged port, to which, however, a special tube construction connects which ensures as smooth as possible non-turbulent flow and its tangential exit into the column top.

Abstract: An absorption medium for removing acid gases from a fluid stream comprises an aqueous solution of a) of at least one metal salt of an aminocarboxylic acid, and b) of at least one acid promoter, wherein the molar ratio of b) to a) is in the range from 0.0005 to 1.0. The acid promoter is selected from mineral acids, carboxylic acids, sulfonic acids, organic phosphonic acids and partial esters thereof. The absorption medium, compared with absorption media based on amino acid salts, has a reduced regeneration energy requirement without significantly reducing the absorption capacity of the solution for acid gases. In a process for removing acid gases from the fluid stream, the fluid stream is brought into contact with the absorption medium.

Abstract: The invention relates to an absorbent, comprising an aqueous solution (A) of at least one amino acid salt of the formula (I), wherein R1 and R2 independently from each other represent alkyl or hydroxyalkyl, R is hydrogen, alkyl or hydroxyalkyl, or a group R together with R1 is alkylene, M is an alkali metal, and n an integer from 1 to 6, and (B) of at least one primary alkanolamine, which is substantially free of inorganic alkaline salts. The absorbent is used in a method for removing carbon dioxide from a gas flow, particularly combustion exhaust gases. Preferred amino acid salts (A) are N,N-dimethylamino acetic acid potassium salt, N,N-diethylamino acetic acid potassium salt and N-ethyl-N-dimethylamino acetic acid-potassium salt. Preferred alkanolamines (B) are 2-aminoethanol, 3-aminopropanol, 4-aminobutanol, 2-aminobutanol, 5-aminopentanol, 2-aminopentanol and 2-(2-aminoethoxy)ethanol.

Abstract: A description is given of an absorption medium for removing carbon dioxide from a gas stream, which comprises an aqueous solution of at least one amine and at least one aminocarboxylic acid and/or aminosulfonic acid. The concomitant use of an aminocarboxylic acid or aminosulfonic acid reduces the energy required for regeneration of the absorption medium.

Abstract: A method for removing acid gases from a fluid stream in which the fluid stream, in contact with an absorption medium in the form of an aqueous amine solution in an absorber, is passed through a first absorption zone and through a second absorption zone, the loaded absorption medium is passed into a first regeneration zone, a part of the resultant partially regenerated absorption medium is passed into the first absorption zone, the other part of the partially regenerated absorption medium is passed into a second regeneration zone, and a part of the resultant regenerated absorption medium is passed into the first absorption zone and the other part of the regenerated absorption medium is passed into the second absorption zone. The method can be carried out with few changes to apparatus of a hot pot plant, the energy requirement for the same performance being no higher than in the hot pot process.

Abstract: A method of forming an integrated deep and shallow trench isolation structure comprises depositing a hard mask on a film stack having a plurality of layers formed on a substrate such that the hard mask is deposited on a furthermost layer from the substrate, imprinting a first pattern into the hard mask to define an open end of a first trench, imprinting a second pattern into the hard mask to define an open end of a second trench, and etching into the film stack the first trench to a first depth and the second trench to a second depth such that the first trench and the second trench each define a blind aperture in the surface of the film stack.