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| Number | Title | Issue Date |
| 6596136 | Membrane electrolytic cell with active gas/liquid separation The invention relates to an electrochemical half cell (1) which consists of at least one membrane (4), an electrode (3) as anode or cathode which optionally produces gas, optionally an outlet (8; 16) for the gas and a support structure (12) linking the el... | 07/22/2003 |
| 6521173 | Low oxygen refractory metal powder for powder metallurgy A method of making sheet bar and other precursors of formed products to be made by extensive working. The method includes providing a powder metal, preferably under 100 PPM oxygen content of non-spherical particles, compacting the powder into a coherent p... | 02/18/2003 |
| 6515846 | Capacitor substrates made of refractory metal nitrides Metal nitride compound powder substrate for capacitor anodic oxide film and the substrate interface therebetween, characterized, relative to un-nitrided analogs, by reduced temperature bias and frequency dependencies of capacitance, the substrate-anodic o... | 02/04/2003 |
| 6507428 | Arrangement based on poly-(3,4-dioxythiophene) derivatives which are electrochromically switched with protons The invention relates to electrochromic arrangements in a layered structure which are characterized in that one layer contains an electrically conductive electrochromic polydioxythiophene, another layer comprises an electrolyte containing a protonic acid,... | 01/14/2003 |
| 6465678 | Method for preparing methyl carbazate Methyl carbazate which is particularly pure and has a particularly low tendency toward discoloration is obtained from hydrazine and dimethyl carbonate if the two reactants are metered simultaneously into an initially introduced first solvent at from -20 t... | 10/15/2002 |
| 6455725 | Substituted cinnamic acids and cinnamic acid esters The invention relates to substituted cinnamic acids and cinnamic acid esters of formula (I), wherein X represents F, Cl or J and R1 and R2 are the same or different and represent hydrogen, an optionally substituted C1 -C | 09/24/2002 |
| 6447739 | Method for producing lithium transition metallates The invention relates to a method for producing lithium transition metalates of the general formula (I): Lix (M1y M21-y)n Onz, where M1 represents lithium, cobalt or m... | 09/10/2002 |
| 6426143 | Moulded part and flexible film with a protected printed conductor, and method for producing the same A shaped plastic part and a flexible film with a protected conductor track, in particular made from copper, are described, as is a process for their production. The shaped plastic part or the flexible film is composed at least of a plastic film (1) as bac... | 07/30/2002 |
| 6420465 | Process for preparing phosphoric acid esters The present invention relates to a process for preparing phosphoric acid esters, in particular monomeric bisaryl diphosphates, or bridged phosphates.... | 07/16/2002 |
| 6395661 | Sintered silicon nitride, components made therewith, specially valves, methods for the production and use thereof A sintered Si3 N4 material, valves and components made with the material, and methods for making same.... | 05/28/2002 |
| 6395165 | Process for preparing perfluorinated organic compounds by electrochemical fluorination A novel process for the continuous preparation of perfluorinated organic compounds by electrochemical fluorination of the parent non-fluorinated or partially fluorinated organic compounds using hydrogen fluoride having an arsenic content of less than abou... | 05/28/2002 |
| 6369259 | Method of preparing 4,5,6-trichloro-and 2,4,5,6-tetrachloropyrimidine Crystals with an average crystal size of ࣘ10 μm comprising compounds of the formula Ia and/or IIa ##STR1## A process for making said crystals.... | 04/09/2002 |
| 6346227 | Process for preparing pure hydrofluoric acid The novel process for preparing pure hydrofluoric acid or pure hydrogen fluoride is characterized in that, after pretreatment by distillatioil/oxidation, a two-stage scrub is carried out using 65-90% strength by weight hydrofluoric acid and 90-100% streng... | 02/12/2002 |
| 6235925 | Process for synthesizing khi-substituted ring systems Using the process according to the invention, it is possible to provide, with few reaction steps, a novel route to -substituted ring systems which optionally have further substituents.... | 05/22/2001 |
| 6232475 | Process for preparing fluorine-containing phenethylamines and novel fluorine-containing ଲ-iminovinyl-and ଲ-iminoethylbenzenes The present invention relates to a process for preparing fluorine-containing phenethylamines which is characterized in that, in a first step, a substituted bromobenzene is reacted with an N-vinylimide in the presence of a palladium catalyst, in a second s... | 05/15/2001 |
| 6229017 | Process for preparing quinolone- and naphthyridone- carboxylic acids and esters thereof An improved process for preparing quinolone- and naphthyridonecarboxylic acids and esters thereof from benzoyl chlorides and nicotinoyl chlorides, respectively, in which the reaction carried out in the presence of a non-polar to slightly polar solvent wit... | 05/08/2001 |
| 6193779 | Tantalum powder, method for producing same powder and sintered anodes obtained from it The invention relates a tantalum powder free of alkali and fluorine, which for a relatively small primary particle size has comparatively large secondary particles and is suitable for producing capacitors with a specific charge of between 100,000 and 180,... | 02/27/2001 |
| 6153414 | Method for racemic biochemical resolution of CIS-and trans-pyprolopiperidine Cis- and trans-pyrrolopiperidines are advantageously separated into their optical isomers when monoacylating by enzymatic process a mixture containing (R,R)- and (S,S)-pyrrolopiperidine or (S,R)- and (R,S)-pyrrolopiperidine, thereby obtaining a mixture (I... | 11/28/2000 |
| 6153780 | Process for the preparation of octa-2,7-dienyl-1-amine from butadiene and ammonia in the presence of palladium complex catalyst Process for the preparation of octa-2,7-dienyl-1-amine by telomerization of butadiene with ammonia in a two-phase system in the presence of hydrophilic palladium complexes, characterized in that octa-2,7-dienyl-1-amine and octa-1,7-dienyl-3-amine are isol... | 11/28/2000 |
| 6150571 | Process for the preparation of 2,4-dichloro-3,5-dimethyl-fluorobenzene A method for preparing 2,4-Dichloro-3,5-dimethylfluorobenzene, wherein the 2,4-Dichloro-3,5-dimethylfluorobenzene can be prepared in highisomeric selectivities when 3,5-dimethylfluorobenzene is chlorinated in the presence of Friedel-Crafts catalysts and a... | 11/21/2000 |
| 6147238 | Process for the preparation of octa-2,7-dienyl-1-amine from butadiene and ammonia in the presence of palladium complex catalyst Process for the preparation of octa-2,7-dienyl-1-amine by telomerization of butadiene with ammonia in a two-phase system in the presence of hydrophilic palladium complexes, characterized in that octa-2,7-dienyl-1-amine and octa-1,7-dienyl-3-amine are isol... | 11/14/2000 |
| 6137011 | Process for the preparation of bistrifluoromethylbenzylamines Bistrifluoromethylbenzylamines are obtained in a simple manner in high purities and with good yields by catalytic hydrogenation of the corresponding bistrifluoromethylbenzonitriles if the process is carried out in the presence of Raney cobalt, at least on... | 10/24/2000 |
| 6130350 | Process for producing 2-fluorine-1-cyclopropane carboxylic acid derivatives by reductive dehalogenation Cyclopropanecarboxylic acid derivatives are prepared by reacting halogenocyclopropanecarboxylic acid derivatives with metals in the presence of bases and with or without addition of hydrogen in an advantageous manner if the base is added during the reacti... | 10/10/2000 |
| 6127581 | Process for preparing fluorinated benzyl alcohols and fluorinated benzaldehydes Fluorinated benzaldehydes are obtainable in a simple and inexpensive manner and in significantly improved yields when chlorinated benzaldehydes are reacted with alkali metal fluorides at temperatures in the range from about 130 to 200° C. in the presence... | 10/03/2000 |
| 6111140 | Ru--Pd halogen-free catalyzers and method for producing cycloaliphatic amines Catalysts containing ruthenium and palladium for the hydrogenation of aromatic amines to cycloaliphatic amines. Methods for making and using the catalysts.... | 08/29/2000 |
| 6107518 | Preparation and use of iminodisuccinic acid salts A process for the preparation of iminodisuccinic acid alkali metal salts by reaction of maleic acid and ammonia in an aqueous medium in the presence of alkali metal hydroxides and working up thereof.... | 08/22/2000 |
| 6093840 | Silylalkylboranes, oligo or polyborocarbosilazanes and silicon carbonitride ceramics Molecular silylalkylboranes, a process for their preparation, oligo- or polyborocarbosilazanes, a process for their preparation and their use and silicon carbonitride ceramics and a process for their preparation.... | 07/25/2000 |
| 6093852 | Process for preparing 4,6-diamino-resorcinol dihydrochloride The invention concerns 4,6-diamino-resorcinol which is prepared in the form of its dihydrochloride by catalytic hydrogenation of 1,3-benzyloxy-4,6-dinitrobenzene on a noble metal contact in a two-phase mixture of dilute aqueous hydrochloric acid and an or... | 07/25/2000 |
| 6077974 | Process for the continuous preparation of amino-halo-genophenyl alkyl thioethers Amino-halogenophenyl alkyl thioethers prepared in an advantageous manner by catalytic reduction of the corresponding nitro compound by the nitro compound being continuously hydrogenated with hydrogen in the presence of a supported noble-metal catalyst.... | 06/20/2000 |
| 6051634 | Water-dispersible or water-soluble polyurethanes as additives for building materials Use of water-dispersible or water-soluble polyether-urethanes, which optionally contain isocyanate groups, as additives for inorganic binders in the preparation of a building material, particularly a high-density or high-strength mortar or concrete compos... | 04/18/2000 |
| 6051738 | Process for the preparation of octa-2,7-dienyl-1-amine from butadiene and ammonia in the presence of palladium complex catalyst Process for the preparation of octa-2,7-dienyl-1-amine by telomerization of butadiene with ammonia in a two-phase system in the presence of hydrophilic palladium complexes, characterized in that octa-2,7-dienyl-1-amine and octa-1,7-dienyl-3-amine are isol... | 04/18/2000 |
| 6043395 | Process for preparing variable mixtures of cyclohexyl-amine and dicyclohexylamine A high-pressure process for hydrogenating aromatic amines to give mixtures of the corresponding cycloaliphatic amines and dicycloaliphatic amines in variable ratios in the presence of rhodium catalysts.... | 03/28/2000 |
| 5994584 | Process for the preparation of 4-aminodiphenylamine 4-Aminodiphenylamines are prepared by hydrogenating nitrosobenzene or mixtures of nitrosobenzene and nitrobenzene with hydrogen in the presence of fluorides and heterogeneous catalysts in inert aprotic solvents at temperatures from 0 to 200° C. and press... | 11/30/1999 |
