Abstract: The present invention relates to a process for the preparation of cis-2-(2-methylprop-1-enyl)-4-methyltetrahydropyran comprising the catalytic hydrogenation of 2-(2-methylprop-1-enyl)-4-methylenetetrahydropyran in the presence of hydrogen and a heterogeneous catalyst comprising ruthenium on a support and subsequently bringing the compounds obtained in this way into contact with a strongly acidic cation exchanger.

Abstract: Precipitated silicas and wax-coated precipitated silicas, their preparation, and their use as matting agents in inks and paints, the precipitated silicas characterized by: BET 350-550 m2/g DBP number 320-400 g/100 g d50 5-15 ?m, and tamped density 20-90 g/l.

Abstract: The present invention relates to a process for the preparation of cis-2-(2-methylprop-1-enyl)-4-methyltetrahydropyran comprising the catalytic hydrogenation of 2-(2-methylprop-1-enyl)-4-methylenetetrahydropyran in the presence of hydrogen and a heterogeneous catalyst comprising ruthenium on a support and subsequently bringing the compounds obtained in this way into contact with a strongly acidic cation exchanger.

Abstract: Highly efficient matting agents based on precipitated silicas and wax-coated precipitated silicas, their preparation, and their use in inks and paints.

Abstract: A surface-modified precipitated silica, useful as a matting agent, contains the silica having a polymer on a surface thereof. The surface-modified precipitated silica improves the transmission of a clear coating material, having a refractive index of nD20=1.4492 and containing 5% by weight of said silica, by at least 20%, in comparison to the same clear coating material containing 5% by weight of a reference precipitated silica surface treated with a polyethylene wax.

Abstract: The present invention relates to a process for preparing ?-bisabolol, comprising the reaction of farnesol in the presence of a ketone, of a sulfonic acid and of a further strong acid.

Abstract: Highly efficient matting agents based on precipitated silicas and wax-coated precipitated silicas, their preparation, and their use in inks and paints.

Abstract: A precipitated silica characterized by BET 350-550 m2/g DBP number 350-400 g/100 g d50 5-15 ?m, and tamped density 20 to less than 70 g/l.

Abstract: The present invention relates to a process for preparing ?-bisabolol, comprising the reaction of farnesol in the presence of a ketone, of a sulfonic acid and of a further strong acid.

Abstract: A surface-modified precipitated silica, useful as a matting agent, contains the silica having a polymer on a surface thereof. The surface-modified precipitated silica improves the transmission of a clear coating material, having a refractive index of nD20=1.4492 and containing 5% by weight of said silica, by at least 20%, in comparison to the same clear coating material containing 5% by weight of a reference precipitated silica surface treated with a polyethylene wax.

Abstract: The present invention provides a process, which includes: coating at least a portion of a surface of at least one silica particle with at least one wax, wherein the coating is carried out in at least one gas at a temperature above the melting point of the wax and below the decomposition temperature of the wax, to obtain at least one wax-coated silica particle. Other embodiments of the present invention provides processes for impregnating the silica particle with wax and uses of the wax-coated or wax-impregnated particles.

Abstract: Highly efficient matting agents based on precipitated silicas and wax-coated precipitated silicas, their preparation, and their use in inks and paints.

Abstract: In a process and device for calibrating throttle bores, in particular in injection valves for internal combustion engines, by means of hydroerosive machining of the throttle bore with a suspension, the actual through flow is compared to a predetermined reference through flow. When the actual—and reference through flows coincide, the hydroerosive machining is brought to an end. On the outflow side of the throttle bore, a counterpressure is built up, which prevents the cavitation of the fluid.

Abstract: A method for producing bores in workpieces of electrically conductive material, in particular injection ports (11) in injection nozzles (10) is disclosed, in which method, by means of an erosion wire (12) forming an electrode, material in the workpiece forming the counterelectrode is removed in a targeted way by spark erosion. To produce bores of different cross-sectional shapes and/or a varying cross-sectional area over the length of the hole, the erosion wire (12) is actively excited to a defined vibration, and the form of vibration is established by targeted variation of the vibration excitation in accordance with the desired bore hole shape. A preferred apparatus for performing the method has a fastening unit (13), which receives the end (122) of the erosion wire (12) and which is driven by two actuators (14, 15) to execute a separate oscillating displacement along an x axis and a y axis (FIG. 1).

Abstract: Aluminum-doped precipitated silicas having a BET surface area of more than 300 m2/g and aluminum distributed uniformly in the silica particles are prepared by sequentially heating a mixture of water and sodium silicate at a temperature of from 70 to 86° C. and adding sulfuric acid until half of the sodium silicate is neutralized, then aging the mixture for a time of from 30 to 120 minutes, adjusting the pH of the mixture with sulfuric acid to a range of from 3.0 to 7.0, thereby precipitating the aluminum-doped silica, filtering the aluminum-doped silica from the mixture to form a filtercake and washing the filtercake, followed by drying and/or grinding the washed filtercake. An aluminum salt solution is metered into the mixture at step a) and/or step c). The aluminum-doped precipitated silicas of the present invention may be used in coatings for paper and other media intended for ink jet printing.

Abstract: The present invention provides a process, which includes:

Abstract: A fuel-injection valve, in particular, a high-pressure injection valve, for injecting fuel directly into a combustion chamber of a mixture-compressing internal combustion engine with externally supplied ignition is distinguished by the fact that a guide and seating area formed by three disc-shaped elements is provided at a downstream end of the valve. A swirl element is embedded between a guide element and a valve seat element. The guide element is used to guide a valve needle which passes through it and can move in the axial direction, while a valve closing segment of the valve interacts with a valve seat surface of the valve seat element. The swirl element has an inner opening area with multiple swirl channels. The three disc-shaped elements are permanently connected to each other, forming a positive-locking joint.

Abstract: The bus system (2) for the transfer of data within a master-slave system (1) comprises a parallel data bus (3) and a serial data bus (4, 5), as well as at least one control line (15, 16) for a control signal (SnP, RnW) determining the manner of transfer, wherein each slave (S.sub.1 . . . n) can be connected to a data bus (3; 4, 5) corresponding to its interface (SIF.sub.p, SIF.sub.S) and can be controlled with respect to the manner of transfer. Upon the transfer of both serial data (SD) and parallel data (PD) with the addressing of the or each slave (Sn), a first control signal (serial, not parallel) for the type of transfer is set before a strobe signal (STRB) for the transfer of data is activated. For the determining of a write or read access, a further control signal (RnW) for the direction of transfer (read, not write) is set.

Abstract: Abstract of the Disclosure: N-Hetaryl-2-nitroanilines Ia and Ib ##STR1## (R.sup.1 =H, halogen, C.sub.1 -C.sub.4 -alkoxy; R.sup.2 =NO.sub.2, CN, halogen, C.sub.1 -C.sub.4 -haloalkyl; R.sup.3 =NO.sub.2, halogen, C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.4 -haloalkyl; R.sup.4 =CO--R.sup.5,CO--OR.sup.5, SO.sub.2 R.sup.5 with R.sup.5 =C.sub.1 -C.sub.4 -alkyl, substituted or unsubstituted phenyl or naphthyl; Q=H, alkali metal or alkaline earth metal ion, substituted or unsubstituted ammonium ion, phosphonium, sulfonium or sulfoxonium ion, one equivalent of a transition metal cation; Het=thienyl, thiazolyl, isothiazolyl or thiadiazolyl, each of which is linked via a ring carbon to the basic element, which can be fused to a non-aromatic C.sub.5 -C.sub.8 -ring and/or can additionally carry on each other carbon one of the following: CN, SCN, NO.sub.2, halogen, alkyl, haloalkyl, cycloalkyl, alkoxy, alkylthio, substituted or unsubstituted phenyl, naphthyl, benzyl or thienyl, CO--R.sup.5, CO--OR.sup.5, NR.sup.6 R.sup.7 ; R.

Abstract: An acylcyclohexadionethiocarboxylic S-ester of the formula ##STR1## where R.sup.1 and R.sup.2 are substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, benzyl or phenyl, and R.sup.2 is additionally hydrogen, are prepared by reacting an acylcyclohexadione II ##STR2## with hydroxylamine or hydroxylamine-O-sulfonic acid in an inert solvent at from 0.degree. to 150.degree. C., to give an acylcyclohexadione compound III ##STR3## and then reacting the compound III with a mercaptan IVR.sup.2 --SH IVin the presence of an anhydrous acid HX to give an acylcyclohexadionethiocarboximidic S-ester salt V ##STR4## where X is the anion of the acid, and hydrolyzing the compounds V to the acylcyclohexadionethiocarboxylic S-ester I.