Abstract: The present invention relates to a method for purifying a mixture containing at least one alkyl hydroperoxide, preferably tert-butyl hydroperoxide or tert-amyl hydroperoxide, and at least one corresponding dialkyl hydroperoxide, said method comprising at least one step of extraction with water and at least one separation step which is carried out within the aqueous phase, obtained following the extraction step, in order to recover an aqueous solution which is rich in alkyl hydroperoxide. The invention also relates to an aqueous composition which is rich in alkyl hydroperoxide and contains at least 0.1% by weight of dialkyl peroxide in relation to the total weight of the composition.

Abstract: The present invention concerns a method and an apparatus (10, 20) for a continuous preparation of organic peroxides, with the reactor comprising at least one flow channel (1, 1a, 1b) configured as a reaction zone; an inlet system (2) in fluid communication with a first end of the at least one flow channel and configured for introducing two or more substances or a combination of substances into the at least one flow channel; an outlet system (3) in fluid communication with a second end of the at least one flow channel, the second end being located downstream of the first end and the outlet system being configured for extracting a reaction product present at the second end; an oscillatory system (4, 5) configured for superimposing an oscillatory flow on the flow of substances passing through the at least one flow channel, the oscillatory being effected in at least a section of the at least one flow channel; and a controller configured to implement the method by controlling the inlet system to introduce, accordi

Abstract: The present invention concerns a method and an apparatus (10, 20) for a continuous preparation of organic peroxides, with the reactor comprising at least one flow channel (1, 1a, 1b) configured as a reaction zone; an inlet system (2) in fluid communication with a first end of the at least one flow channel and configured for introducing two or more substances or a combination of substances into the at least one flow channel; an outlet system (3) in fluid communication with a second end of the at least one flow channel, the second end being located downstream of the first end and the outlet system being configured for extracting a reaction product present at the second end; an oscillatory system (4, 5) configured for superimposing an oscillatory flow on the flow of substances passing through the at least one flow channel, the oscillatory being effected in at least a section of the at least one flow channel; and a controller configured to implement the method by controlling the inlet system to introduce, accordi

Abstract: An aqueous emulsion composition of organic peroxide, including from 10 to 65% by weight of one or a plurality of organic peroxides, from 2 to 25% by weight of at least one antifreeze agent, from 0.01 to 10% by weight of at least one emulsifying agent, optionally at least one additive, water, of which the quantity is defined in order to form the remainder of the total composition (100%), wherein the emulsifying agent is a colloid agent of a polyvinyl acetate having a degree of hydrolysis greater than 80% and a viscosity, measured in solution in water at 4% by weight at 20° C., less than or equal to 5 mPa·s, said viscosity being measured with a Brookfield RVT viscometer, needle no. 3, 20 rpm, in accordance with the ISO 2555 standard. Also, to the method of preparing same and the use thereof.

Abstract: An aqueous emulsion composition of organic peroxide, including from 10 to 65% by weight of one or a plurality of organic peroxides, from 2 to 25% by weight of at least one antifreeze agent, from 0.01 to 10% by weight of at least one emulsifying agent, optionally at least one additive, water, of which the quantity is defined in order to form the remainder of the total composition (100%), wherein the emulsifying agent is a colloid agent of a polyvinyl acetate having a degree of hydrolysis greater than 80% and a viscosity, measured in solution in water at 4% by weight at 20° C., less than or equal to 5 mPa·s, said viscosity being measured with a Brookfield RVT viscometer, needle no. 3, 20 rpm, in accordance with the ISO 2555 standard. Also, to the method of preparing same and the use thereof.

Abstract: The invention relates to a ground-effect vehicle for the rapid transport of people and/or freight, with at least one body, a drive train and ground-effect bearing surfaces, a guidance system for directional control and a drive system on the body and/or bearing surface in the form of propeller or fan drives. The aim of the invention is to provide a ground-effect vehicle which is inexpensive to build, avoids the prior art drawbacks in particular and is especially economical to operate. According to the invention, the ground-effect vehicle consists of at least one aircraft fuselage (1), the ground-effect bearing surfaces (2) are secured directly at least to parts of the existing bearing surfaces (6) of the aircraft or at least on the existing spars (12) surrounding them or secured thereto beneath the existing bearing surfaces (6) and that the drive system (4; 15; 16) has means which increase the power and/or reduce friction in the take-off and landing phases.

Abstract: This invention encompasses compounds of formula (I) and the pharmaceutically ##STR1## acceptable salts thereof, wherein W,X,Y,A,T,R.sub.1 -R.sub.4,B,Ar,n and m are described herein and are useful in treating feeding disorders and certain cardiovascular diseases due to the binding of these compounds to human Neuropeptide Y1 receptors.

Abstract: Trim compensation for a hovercraft having two engines (2,3) with flow outlet apertures. The two engines (2,3) are arranged laterally at the stern of the hovercraft to generate air jets for forward motion. The hovercraft also includes a compressor to generate an air cushion beneath the hovercraft. The trim compensation includes a tail plane arrangement located in the air jets in the two engines for directional control of the hovercraft by deflection of the air jets. The tail plane arrangement consists of a negatively arranged V-plane (7) with a middle upper section from which extends stabilizer surfaces (9,10) at both sides in a downward direction. The stabilizer surfaces (9, 10) are provided with rudder elements (11, 12) which are swingable in the same or opposite direction to deflect the air jets. The stabilizer surfaces (9, 10) and the rudder elements (11, 12) run centrally across the flow outlet apertures of the engines (2, 3).

Abstract: A steering device for a hovercraft having two driving engines (2, 3), a back skirt (5), a finger skirt (6) and a jet deflection device located downstream of the two driving engines (2, 3). The jet deflection device includes a negative Vee stream deflector (7) and rudder elements (11, 12) which can be operated in opposite directions. The Vee stream deflector (7) is arranged behind the driving engines (2, 3) in such a way that each driving engine (2, 3) is assigned a portion of the Vee stream deflector (7) having the rudder element (11; 12). The rudder elements (11; 12) run diagonally through an axis of symmetry of the respective driving engine (2, 3). The Vee stream deflector (7) further includes a middle section which acts as a stabilizing nose (8).

Abstract: A floatable ground effect vehicle is provided with at least one wing arrangement, at least one thrust generator (10) seated in front of the wing arrangement and at least one airflow duct (14) from the thrust generator (10) which can be directed under the wing arrangement. So that the ground effect vehicle can also be designed for a larger number of passengers, the central region of the vehicle is designed as an elongated cabin (2) which is seated on a boat-type float or is itself design as the boat hull. Stub wings (3) arranged on both sides and distributed at equal distances are provided over the length of the passenger cabin (2), the stub wings enclosing a static pressure build-up space on their lower surface. At least one separate thrust generator (10) is installed in front of at least some stub wings (3), the thrust generator being connected or connectable to the respective static pressure build-up space by means of an airflow duct (14).

Abstract: An electric motor (1) comprises a housing (5) which encloses it tightly and consists of a stainless steel sheet jacket (28), a stator (2), a shaft (3) which is passed out of the housing, and two centering pieces (6, 7) arranged on both sides of the stator (2), which abut the end faces of the stator (2) and in which the shaft (3) is mounted. In such a motor (1) the housing (5) is required, while retaining the known advantages, to withstand high mechanical stresses and moreover to be capable of being produced for a small outlay. To this end the centering pieces (6, 7) are of thick-walled construction, preferably of cast material, and the outside diameter on the side facing the stator (2) is greater than that of the stator, the centering pieces (6, 7) embracing the stator (2) positively.

Abstract: A storage system, in particular a multi-story car park, comprises a displaceable lift (10) resembling a tower and transport pallets (8) with a guide rail on their lower side. The pallets (8) are gripped by the transfer device (47) forming part of the lift (10), which transfers them from the roller rails (20) of the lift (10) to stationary roller rails (7) of the parking places.

Abstract: A method of spinning filaments from a melt which comprises flowing said melt through openings in a nozzle plate to form a stream of said filaments, directing a coolant radially outwardly from the center of said stream through a porous wall of a dispersing head provided with a downstream baffle adjusted to partially reduce the inside pressures of the coolant adjacent to the baffle to a value lower than the outside pressure, the resistance of said coolant caused by the wall porosity satisfying the relationship1.43.times.10.sup.6 m+2222 m.sup.2 =p=-96.96 m+20202 m.sup.2wherein m is the rate of flow of said coolant across the area of said porous wall in kg/h-cm.sup.2, and p is the pressure drop in Pa.

Abstract: An apparatus for spinning filaments from a melt has a nozzle plate with a plurality of passages through which the melt flows to form a stream of filaments, a downstream dispersing head in the stream in the form of a cylinder with its axis parallel to the stream of filaments and having an upstream end and a downstream end, a coolant source connected to the dispersing head having a porous wall parallel to the filament stream whereby coolant passes through the wall and impinges on the filaments and a baffle in the dispersing head to reduce the coolant pressure adjacent to the baffle, a resistance to the coolant flow satisfying a specific formula which avoids the prior art problems.

Abstract: Electromotors used as submersible motors consist of a fluid-tight housing (2), a shaft (3) mounted therein, the connecting end of which is brought out on one side in a leakproof fashion from the housing (2), a rotor (8) seated on the shaft (3), and a stator (9) fixed relative to the housing (2). In order for the electromotor to be switched over without appreciable expense from one voltage to another voltage in a very simple and reliable way, even by unskilled persons, a voltage selector switch (23) is provided in the interior of the housing (2). To actuate the voltage selector switch (23), there is provided in the region of the voltage selector switch a detachable housing part which, in the detached state, clears a housing opening through which the actuating element of the voltage selector switch (23) is accessible.

Abstract: A ground effect vehicle consists of a central, wing-like support body (1), floats (5) and/or undercarriage units located on both sides of the support body, a thrust generator (11) located in front of the support body, a control surface (14, 16) and a cabin (17), located on top of the support body for at least one person and, if required, for payloads. In order to increase the ground effect and to realize the ground effect even at low speeds, a nose (6) extending far forwards is provided in front of the support body (1), which nose forms an airflow duct (7) directed under the support body, the thrust generator (11) being located under the front region of the nose (6) in or immediately in front of the airflow duct (7).

Abstract: An aeration apparatus for waters consists of a float element and of at least one aerator unit supported thereby, with a motor-driven pump, with a mixing chamber downstream of the latter, with an air pipe connected to the mixing chamber and with at least one ejector leading out of the mixing chamber. To enable even large waters, such as, for example, marine bays or the like, to be adequately aerated for an acceptable outlay for apparatus, the float element which supports the aerator unit or the aerator units is a walk-on boat hull (1). The aerator units (2) are attached to the exterior wall (9) of the boat hull (1). At least one of the aerator units is constructed as an immersed aerator and can serve as a drive means for the boat hull (FIG. 1).

Abstract: A hoisting apparatus for submersible pump units (4), which is provided particularly for use in deep shafts, comprises a flexible traction element, a drive means for hoisting and lowering the traction element, and a coupling part (1) arranged at the lower end of the traction element, which is automatically connectable to and releasable from a corresponding connecting element (26) provided on the submersible pump unit.