Abstract: A catalyst process is disclosed for the reduction of the ignition temperature of Diesel soot filtered out of the exhaust gas of Diesel engines by passing the exhaust gas over a catalytically active substance, which is selected from lithium oxide, copper chloride, vanadium oxide/alkali metal oxide combinations, a vanadate of an alkali metal or of cerium, or a silver or alkali metal perrhenate, preferably of sodium or silver, or mixtures of these substances.

Abstract: A catalyst process is disclosed for the reduction of the ignition temperature of Diesel soot filtered out of the exhaust gas of Diesel engines by passing the exhaust gas over a catalytically active substance, which is selected from lithium oxide, copper chloride, vanadium oxide/alkali metal oxide combinations, a vanadate of an alkali metal or of cerium, or a silver or alkali metal perrhenate, preferably of sodium or silver, or mixtures of these substances.

Abstract: A process and catalyst is disclosed for the reduction of the ignition temperature of diesel soot filtered out of the exhaust fumes of diesel engines by passing the exhaust stream through a filter element. The filter element is a temperature resistant inert support onto which is deposited a catalytically effective amount of silver vanadate or a mixture of the temperature resistant carrier material and a catalytically effective amount of silver vanadate.

Abstract: A catalyst is disclosed for combustion of pollutants contained in the exhaust gases of internal combustion engines operated with alcohol. The catalyst consists of a metal carrier, a coating deposited on it made of a catalytically active aluminum oxide and an amount of palladium deposited on said coating. A production process for the catalyst is described which provides a final activation in oxidizing atmosphere or a formation in the stream of the exhaust gas that is to be purified at certain temperatures as well as the use of the catalyst for the simultaneous elimination of aldehydes, alcohols, carbon monoxide and hydrocarbons present in the exhaust gas.

Abstract: A process for applying a coating containing platinum and/or palladium to the surface of a porous catalyst carrier, the depth of penetration being controlled by preloading the carrier with a determined amount of aqueous solution containing ammonium chloride.

Abstract: A mechanically stable screen cloth construction is disclosed which is suitable for a catalyst support.

Abstract: An improved lambda sensor is disclosed for the measurement of the oxygen content in the exhaust gas of internal combustion engines in which the sensor element is provided with a gas permeable wrapping coated with a catalyst. The sensor delivers a clear well defined signal in the so-called rich exhaust gas, which makes possible a more precise adjustment of the fuel-air mixture fed to the internal combustion engine.

Abstract: The invention relates to a method for the manufacture of a metallic matrix which is "monolithic", is coated with a catalysis promoting metal oxide and is disposed in a metal casing, in which the matrix is composed of alternately disposed plain and corrugated or folded metal sheets or plates, in which these sheets are stacked in a pile or are wound into a spiral. The method comprises a special resistance welding on the end faces of the matrix and arc welding of the side face of the matrix to the side of the casing, on which the metal oxide is applied.

Abstract: A three-way catalyst is described for the purification of automobile exhaust gases formed of an active substance of platinum and rhodium and possibly base metal(s) at a certain weight ratio between the two noble metals and at a certain atomic ratio between the noble and the base metal, which are precipitated onto active aluminum oxide containing certain quantities of CeO.sub.2, ZrO.sub.2 and Fe.sub.2 O.sub.3, and whereby the catalyst is obtained by impregnating active aluminum oxide, possibly stabilized with alkaline earth metal, with a solution of cerium, zirconium and iron salt which is thereupon calcined in air at 500.degree.-700.degree. C. and then treated after application of an impregnation of salts of the active substance components in a gas current containing hydrogen at temperatures below 650.degree. C.

Abstract: There are prepared compounds of the formula[R.sub.n.sup.1 (R.sup.2 O).sub.3-n --Si--Alk--S--].sub.x Z (I)whereZ is .tbd.PO, .tbd.PS, .tbd.P, .dbd.PR, --P(R).sub.2, --P(OR).sub.2, .dbd.P(OR), --PO(OR).sub.2, --PS(OR).sub.2, .dbd.PO(OR) or .dbd.PS(OR) where R is an alkyl group of 1 to 5 carbon atoms, phenyl or o-, m- or p-nitrophenyl;Alk is an alkylene group with 2 to 4 carbon atoms;R.sup.1 is an alkyl group having 1 to 5 carbon atoms, benzyl or phenyl;R.sup.2 is an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, phenyl, benzyl or 2-methoxyethyl, each R.sup.1 and R.sup.2 can have the same or different meanings;n is 0, 1 or 2; and,x is 1, 2 or 3, being the residual valence of Z.The compounds are useful as reinforcing agents in vulcanizable rubber mixtures which contain a silicate filler and optionally carbon black.

Abstract: There are prepared compounds of the formula[R.sub.n.sup.1 (R.sup.2 O).sub.3-n -- Si -- Alk -- S -- ].sub.x Z (I)whereZ is .tbd.PO, .tbd.PS, .tbd.P, .dbd.PR, --P(R).sub.2, --P(OR).sub.2, .dbd.P(OR), --PO(OR).sub.2, --PS(OR).sub.2, .dbd.PO(OR) or .dbd.PS(OR) where R is an alkyl group of 1 to 5 carbon atoms, phenyl or o-, m- or p-nitrophenyl;Alk is an alkylene group with 2 to 4 carbon atoms;R.sup.1 is an alkyl group having 1 to 5 carbon atoms, benzyl or phenyl;R.sup.2 is an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, phenyl, benzyl or 2-methoxyethyl, each R.sup.1 and R.sup.2 can have the same or different meanings;N is 0, 1 or 2; and,X is 1, 2 or 3, being the residual valence of Z.The compounds are useful as reinforcing agents in vulcanizable rubber mixtures which contain a silicate filler and optionally carbon black.

Abstract: There is provided a process for the production of sulfur containing organosilicon compounds of the formula (I) Z -- Alk -- S.sub.x -- Alk -- Z, where Z is the grouping: ##STR1## in which R.sup.1 is an alkyl group having 1 to 5 carbon atoms, a cycloalkyl group with 5 to 8 carbon atoms, the benzyl group, phenyl or phenyl substituted with at least one methyl, ethyl or chloro group, R.sup.2 is alkoxy of 1 to 4 carbon atoms, methoxyethoxy, cycloalkoxy with 5 to 8 carbon atoms, phenoxy or benzyloxy, R.sup.3 and R.sup.4 are alkyl of 1 to 3 carbon atoms or hydrogen, Alk is divalent saturated hydrocarbon group having 1 to 5 carbon atoms or such a group interrupted by --O--, --S-- or --NH-- and x is a number from 2.0 to 6.

Abstract: There is provided a process for the production of sulfur containing organosilicon compounds of the formula (I) Z--Alk--S.sub.x --Alk--Z, where Z is the grouping: ##STR1## in which R.sup.1 is an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group with 5 to 8 carbon atoms, the benzyl group, phenyl or phenyl substituted with at least one methyl, ethyl or chloro group and R.sup.2 is alkoxy of 1 to 8 carbon atoms, methoxyethoxy, cycloalkoxy with 5 to 8 carbon atoms, phenoxy or benzyloxy, Alk is divalent saturated hydrocarbon group having 1 to 10 carbon atoms or such a group interrupted once or twice by --O--, --S-- or --NH-- and x is a number from 2.0 to 6.0 comprising reacting a compound of the formula (II) Y--Alk--Hal, where Y is: ##STR2## WHERE Hal is fluorine, chlorine, bromine or iodine with at least one compound of the formula R.sup.3 OH in which R.sup.

Abstract: Compounds are prepared having the formulaZ--Alk--S.sub.x --Alk Z Iwherein Z is ##STR1## where R.sup.1 is an alkyl group of 1 to 4 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms or phenyl,R.sup.2 is an alkoxy group of 1 to 8 carbon atoms, a cycloalkoxy group of 5 to 8 carbon atoms or phenoxy,Alk is a divalent hydrocarbon chain of 1 to 10 carbon atoms which can be interrupted with one or two --O--, --S-- or --NH group, andX is a number of 2 to 6 by reacting a compound having the formulaIi. z--alk--SH with sulfur. Some of the compounds are novel and some are old, e.g., in Meyer-Simon U.S. Pat. No. 3,842,111. The compounds are useful as bonding agents in sulfur vulcanizable rubbers.