摘要:
Process for the preparation of naphthalene-1,8-dicarboximide which is optionally substituted in the naphthalene ring, characterized in that naphthalene-1,8-dicarboxylic anhydride which is optionally substituted in the naphthalene ring is reacted with an ammonium salt in an aqueous medium at a pH near to the neutral point, the reaction mixture is then acidified to a pH of 1 to 4 and the pH is subsequently adjusted to a value near to the neutral point.
摘要:
Process for preparing thioindigo compounds of the formula ##STR1## in which A and B denote identical or different, optionally substituted benzene rings or benzene rings to which may be joined further carbocyclic and heterocyclic rings,characterized in that compounds of the formulae ##STR2## in which A and B have the abovementioned meaning andX denotes halogen, such as bromine and preferably chlorine,are reacted in a liquid mixture of an aluminium halide, an alkali metal halide and a carboxamide or sulphonamide, and the resulting intermediate product is subsequently, if desired after prior isolation, oxidized in a manner known per se, and the batch is worked up for the compounds of the formula (I).
摘要:
Process for the preparation of thioindigo compounds of the formula ##STR1## in which A and B designate identical or different optionally substituted benzene rings or benzene rings onto which further carbocyclic and heterocyclic rings are fused,characterized in that compounds of the formula ##STR2## in which A and B have the meaning indicated above andX designates halogen, such as bromine and, preferably, chlorine,are reacted in a liquid mixture of an aluminium halide, an alkali metal halide and SO.sub.2 and the resulting intermediate product is then oxidized in a manner which is in itself known, if appropriate after first being isolated, and the mixture is worked up to give the compounds of the formula (I).
摘要:
Process for the preparation of thioindigo compounds of the formula ##STR1## in which A and B designate identical or different, optionally substituted benzene rings or benzene rings to which further carbocyclic and heterocyclic rings can be fused,characterized in that compounds of the formula ##STR2## in which A and B have the abovementioned meaning, are reacted in a mixture of chlorosulphonic acid and a further halide of an inorganic acid and, if appropriate, the resulting reaction product is oxidized in a manner which is in itself known and the batch is worked up to give compounds of the formula (I).
摘要:
In spite of their pigment character, dyestuffs of the formula ##STR1## are outstandingly suitable for dyeing synthetic fibres, in particular polyester fibres, by customary methods, strong yellow dyeings with good fastness to light and sublimation being obtained. In the abovementioned formula:R.sub.1 and R.sub.3 denote hydrogen, alkyl, aralkyl, alkoxyalkyl, alkoxycarbonyl, alkoxycarbonylalkyl or aryl,R.sub.2 and R.sub.4 denote alkylcarbonyl, arylcarbonyl, alkoxycarbonyl, --CN or --CONX.sub.1 X.sub.2,X.sub.1 denotes hydrogen, alkyl, aralkyl, aryl or cycloalkyl andX.sub.2 denotes hydrogen or alkyl.
摘要:
The new dyestuffs of the formula (I) ##STR1## wherein the substituents R and R.sup.1 and the index n have the meaning given in the description, are outstandingly suitable for dyeing and printing cellulose-containing materials, in particular for the preparation of recording liquids for ink jet recording systems.
摘要:
In an internal combustion engine comprising a mechanical charger in the form of a positive displacement compressor connected to the engine intake duct for supplying compressed air to the engine and a turbo-compound including an exhaust gas turbine connected to the engine exhaust duct for converting energy remaining in the exhaust gas to power, the exhaust gas turbine being connected to the engine via a reduction gear drive, the mechanical charger and the turbo-compound are coupled to the engine by a common belt drive including a first belt pulley mounted on the crankshaft of the engine, a second belt pulley mounted on the shaft of the reduction gear drive, and a third belt pulley mounted on the shaft of the mechanical charger.
摘要:
In an internal combustion engine comprising a mechanical charger in the form of a positive displacement compressor connected to the engine intake duct for supplying compressed air to the engine and a turbo-compound including an exhaust gas turbine connected to the engine exhaust duct for converting energy remaining in the exhaust gas to power, the exhaust gas turbine being connected to the engine via a reduction gear drive, the mechanical charger and the turbo-compound are coupled to the engine by a common belt drive including a first belt pulley mounted on the crankshaft of the engine, a second belt pulley mounted on the shaft of the reduction gear drive, and a third belt pulley mounted on the shaft of the mechanical charger.
摘要:
The invention relates to a gasoline engine having a catalyst for reducing the emission pollutants, with an oxygen absorption device located in the exhaust line upstream of the catalyst. According to the invention, the gasoline engine is operated in a first operating range with a lean air/fuel ratio (.lambda.), and oxygen is removed from the exhaust by the absorption device. In a second operating range, the gasoline engine is operated at .lambda.=1, and the absorption device is bypassed or deactivated. In the case of a gasoline engine with a Denox catalyst the gasoline engine is operated constantly with a lean air/fuel ratio, with the active surface of the Denox catalyst being "depoisoned" temporarily by activating the oxygen absorption device.
摘要:
An internal combustion engine with combined pressure charging has an exhaust turbocharger turbine arranged in an exhaust conduit of the internal combustion engine driving a compressor arranged in an intake conduit. A mechanically driven supercharger is arranged downstream of the compressor and is coupled continuously variably to the engine via a Fottinger speed transformer with variable-pitch guide vanes and variable speed slip. To bypass the mechanically driven supercharger, a bypass conduit is provided. A circulating-air slide is arranged in the bypass conduit for controlling the air quantity bypassing the mechanically driven supercharger. The degree of opening of the circulating-air slide and the slip of the Fottinger speed transformer are controlled as a function of operating parameters such that the charge-air pressure is adjusted to a predetermined set point value.