Übersetzung für "Metallkatalysator" in Englisch

The amount of metal catalyst can vary over a wide range.

We are pleased to inform you that we have expanded our range of products, which now includes also the metallic catalyst.

The catalyst is preferably a metal catalyst and/or a nitrogen-containing compound.

A further possibility mentioned is to apply the metal catalyst to a support material such as pumice or kieselguhr.

Preferably, these dental restorative materials should be curable without metal catalyst and in a controlled manner without excessive generation of heat.

The doped metal catalyst may be composed of finely divided, unsupported, activated metals and/or metal compounds.

The doping component may have been applied to the doped metal catalyst by absorption, adsorption or deposition.

In the early years, metal catalysts were primarily used in petrol engines to ensure optimum emission control.

If a metal catalyst is included in the positively charged graphite rod (the anode) then single-walled carbon nanotubes form.

The metal catalyst is usually applied onto a known carrier material such as, for example, SiO2, carbon, aluminum oxide, aluminum silicates, BaSO4, and the like, preferably BaSO4 or SiO2.

The process according to the invention is carried out in a simple manner by injecting the oxygen or the gas containing oxygen onto the reaction mixture, or passing it into, or through, the reaction mixture, which consists of the secondary heterocyclic amine, sulphur, mercaptothiazole or dithiazolyl 2,2'-disulphide, metal catalyst, ammonia and the reaction medium.

This occurs in general, when the reduced and in some cases, cooled metal catalysts is maintained in a protective gas atmospheric, to which atmospheric oxygen is gradually introduced in increasing concentrations.

The cooling gas can, for example, be a buffer gas to which is added a small quantity of air, which produces a thin protective oxide layer on the active metal catalyst obtained through reduction, before the catalyst is discharged into the atmosphere through the outlet pipe 16.

In this case, it is desirable to also adjust the pH value of the water to be treated before gassing with hydrogen, so that the subsequent increase in pH remains within the desired range, and/or to adjust the pH value of the water to the desired range while it is in contact with the metal catalyst, preferably to keep it approximately constant.

The reduction is carried out in usual manner, preferably by hydrogenation with a metal catalyst, for example Raney nickel, optionally in a solvent, for example in ethanol.

A metal catalyst according to claim 1, wherein said heat treatment is performed for at least 10 hours in a gas stream of hydrocarbons and air wherein the ratio of carbon atoms in said hydrocarbon to the molecules of oxygen in the air is from about 2 to about 8.

A metal catalyst according to one of the claims 1, 2, 3 or 4 wherein said shaped bodies are formed by mixing an alloy powder of the aluminum alloy with lubricants, and molding the resultant mixture.

The invention relates to a metal catalyst without a carrier for the soot-free production of a fuel gas mixture containing carbon monoxide, hydrogen and gaseous hydrocarbons by partial oxidation of liquid hydrocarbons with air, with air numbers below 0.3 and temperatures between 600 ° and 800° C.

This preferred embodiment is characterized in that the water is fed continuously into a dosing vessel in which the pH is monitored and if necessary adjusted by addition of acid to a level not exceeding pH 12, preferably between pH 4 and pH 11, especially pH 6.5 and pH 9, and then passed by a variable-delivery pump regulating the rate of flow through one or more reactor units, each containing a gassing unit and a reactor, wherein the water first flows through the gassing unit and is gassed therein with hydrogen gas, under pressure if desired, and then is conducted through the reactor containing a catalyst bed with the metal catalyst; with the water running through as many reaction units as are necessary for the reduction of the substances that are to be removed in accordance with the invention.

In a preferred embodiment of the process according to the invention, the 2-chloro-5-cyanopyridine, the inert diluent, the metal catalyst and the ammonia are mixed in an autoclave and then, with the autoclave closed, hydrogen is added with an elevated internal pressure being established.

In the process according to the invention preference is also given to the use of iv) at least one suitable metal catalyst and v) at least one amine compound and/or a metal salt, preferably basic metal salts and mixtures thereof.

To this end, a metal catalyst, for example one composed of molybdenum, manganese, vanadium or tungsten, is added to the acidic nitrating medium.

Not only the metal catalyst, but also the oxidizer are thermally and mechanically stable and in particular are not hygroscopic.

When the p-hydroxybenzaldehyde is liberated by means of acid, the metal catalyst dissolves as the salt and must subsequently be removed from the effluent.

The reduction can be carried out with hydrogen and a metal catalyst, such as, for example, Pt, Pt-on-charcoal, PtO2, Pd, Pd-on-charcoal or Raney nickel, or with complex hydrides, such as, for example, sodium cyanoborohydride. ##STR26##

Moreover, the stability of the matrix can be increased by the insertion of so-called cross-linking agents, also in the form of heteroatoms, the SO3 --group density as well as specific surface area and porosity can be affected; and the catalytic properties can be altered advantageously if they are used as solid acid catalysts or also in partially or totally metal exchanged form as metal catalyst.

An optimal interaction of the MTM motor electronics including MTM middle- and end muffler, the MTM front muffler as well as the pre-tube with a metal catalytic converter.