| Patent Number |
Title Of Patent |
Date Issued |
| 5410085 |
Process for the preparation of chlorine-substituted aromatic amines and of catalysts |
April 25, 1995 |
| Chlorine-substituted aromatic amines are prepared by the hydrogenation of chlorine-substituted aromatic nitro compounds in the presence of a catalyst containing platinum and nickel and/or cobalt on an activated charcoal support, the platinum having been simultaneously deposited and r |
| 5288894 |
Process for the preparation of dialkyl carbonates |
February 22, 1994 |
| Dialkyl carbonates can be prepared by reaction of carbon monoxide with alkyl nitrites in a continuous gas phase reaction, in which a platinum metal catalyst of oxidic or hydroxidic compounds of elements from group Vb of the Periodic Table (Mendeleev) as supports and, if desired, addition |
| 5253993 |
Apparatus for the production of pellets of metal powder used as catalysts |
October 19, 1993 |
| An apparatus for the production of pellets of metal powder, more particularly pellets of highly active metal powder, for example Raney catalysts, has a press with a filling shoe and a pellet discharge shoot. A wet processing environment is established and thus no inert gas atmosphere |
| 5248840 |
Process for the preparation of hydrooxydiphenyls |
September 28, 1993 |
| To prepare hydroxydiphenyls, a compound or a mixture of several compounds consisting of completely or partly hydrogenated hydroxydiphenyl is dehydrogenated catalytically in the gas phase, a catalyst being employed which comprises, as the active constituents, a combination of rhodium and |
| 5231213 |
Process for the preparation of dialkyl carbonates |
July 27, 1993 |
| Dialkyl carbonates can be prepared by reaction of carbon monoxide with alkyl nitrites in continuous gas phase reaction, in which a platinum metal halide catalyst on aluminum oxides, aluminum oxide hydrates or aluminum hydroxides as support and, if desired, an additive comprising an antim |
| 5135903 |
Process for the production of pellets of metal powder as catalysts |
August 4, 1992 |
| The invention relates to a process and an apparatus for the production of pellets of metal powder, more particularly pellets of highly active metal powder, for example Raney catalysts.According to the invention, no inert gas atmosphere is required to avoid oxidation of the metal powder. |
| 5135665 |
Multichamber-candle filter element |
August 4, 1992 |
| Multichamber-candle filter element for filtration of a residual volume of a suspension with rapidly settling solid components, includes at least two chambers (1,2) positioned in succession above each other, a lowest of the chambers being from 1/3 to 1/10 of a total length of the candle f |
| 5120875 |
Process for the preparation of chlorine-substituted aromatic amines |
June 9, 1992 |
| In the preparation of chlorinated aromatic amines by reaction of corresponding nitro compounds with hydrogen under pressure, at elevated temperature and in the presence of a solvent and small amounts of a basic compound, fewer by-products are formed by using platinum and nickel and/or |
| 5090997 |
Process for producing powdered aluminum alloys |
February 25, 1992 |
| In an advantageous process for producing powdered aluminium alloys which have a catalytic action or are capable of acting as precursors of catalysts, good results are obtained if the alloy is atomized with water and/or a gas at a temperature of 50.degree. to 500.degree. C. above its |
| 4792626 |
Production of aromatic diamino compounds using a modified Raney catalyst |
December 20, 1988 |
| Aromatic diamino compounds are produced by hydrogenating the corresponding dinitro compounds in the presence of a modified Raney catalyst. The modified Raney catalyst is obtained by treating an alloy made up of 50-95 wt % of aluminum, 4-45 wt % nickel and/or cobalt and 1-46 wt % of at le |
| 4774221 |
Supported hydrogenation catalysts |
September 27, 1988 |
| Supported catalysts containing palladium on a support material are improved by added bases which remain on the material. These supported catalysts are useful for hydrogenating optionally substituted phenols to give the corresponding cyclohexanols as the predominant product. |
| 4764498 |
Silica-containing shaped articles and a process for their preparation |
August 16, 1988 |
| In the new shaped articles a hollow space or a lumpy inorganic base material is surrounded by a porous silica-containing layer. They can be prepared by applying silica sol or a mixture containing water, silica sol and/or waterglass and, if appropriate, finely pulverulent water-insoluble |
| 4407733 |
Supported catalysts and process for their preparation |
October 4, 1983 |
| A process for the preparation of a supported catalyst containing a catalytically active metal such as a noble metal is disclosed wherein the supported catalyst is prepared by initially contacting the inert support with a base and disposing an amount of base in the support corresponding |
| 4265834 |
Process for the catalytic hydrogenation of nitrobenzene |
May 5, 1981 |
| A process for the hydrogenation of nitrobenzene to aniline is described wherein the nitrobenzene is contacted with hydrogen in the presence of a multi-component supported catalyst containing 1 to 20 grams of noble metal per liter of support and 1 to 20 grams per liter of support of one o |
| 4224248 |
Process for the depyrophorization of pyrophoric metal catalysts and uses thereof |
September 23, 1980 |
| A process has been developed for the depyrophorization of pyrophoric metal catalysts, such as Raney nickel catalysts, which comprises treating said pyrophoric metal catalysts in water and/or an organic solvent with an organic nitro compound or a nitroso compound. The catalysts which are |
| 4176092 |
Process for the depyrophorization of pyrophoric metal catalysts and catalysts prepared by the pr |
November 27, 1979 |
| A process has been developed for the depyrophorization of pyrophoric metal catalysts, such as Raney nickel catalysts, which comprises treating said pyrophoric metal catalysts in water and/or an organic solvent with an organic nitro compound or a nitroso compound. The catalysts which are |
