Heraeus Deutschland Gmbh & Co Kg

W.c. Heraeus Gmbh & Co Kg

W.c. Heraeus Gmbh

Heraeus Precious Metals Gmbh & Co. Kg

Bk Giulini Chemie Gmbh Co Ohg

Richard Walter

Florian Eweiner

Horst Meyer

Robert Sievi

Walter Lässig

Michael Gock

Jörg Fuchs Alameda

Ramona Reitz

Christian Neumann

Steffen Voss

Holger Albert Ulland

Rainer Kiemel

Renate Franz

Jörg Becker

Thomas Staffel

Thomas Klein

Sascha Pihan

Holger Rauter

Martina Kemmer

Lysander Fischer

Jan Schapp

Detlef Gaiser

Christian Breuer

Santiago Casu

Peter Patzelt

Weiwen Dong

Sonja Kirchner

Gerhard Hoffacker

Walter Låssig

Christian Imgrund

Nico Lochner

Mark Neuschütz

Gabriele Przibilla

Walter Laessig

Peter Kettler

Annika Petri

Walter Lassig

Jorg Fuchs Alameda

Preparations of noble metal complexes

Platinum complex of the type [L1L2Pt[O(CO)R1]X], wherein L1 and L2 are the same or different monoolefin ligands or together represent a compound L1L2 acting as a diolefin ligand, wherein X is selected from bromide, chloride, iodide, and —O(CO)R2, wherein —O(CO)R1 and —O(CO)R2 are the same or different C6-C18 or C8-C18 non-aromatic monocarboxylic acid groups with the exception of a phenylacetic acid group, or together represent a C8-C18 non-aromatic dicarboxylic acid group —O(CO)R1R2(CO)O—, wherein it is a mononuclear platinum complex where n=1, or wherein, in the event of the presence of L1L2 and/or of —O(CO)R1R2(CO)O—, it may be a polynuclear platinum complex with a whole number n>1.

Platinum complexes

Method for the production of tetrakis(trihydrocarbylphosphane)palladium(0) in organic solvent, whereby 50 to 100% by weight of the organic solvent consist of at least one polar-aprotic solvent, characterised in that a) at least one palladium compound selected from the group consisting of palladium(II) compounds and palladium(IV) compounds that are soluble in the organic solvent is reacted with b) at least one base, selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal hydrogen carbonates, alkali metal-C-C-alcoholates, ammonium carbonate, ammonium hydrogen carbonate, alkaline earth metal hydroxides, alkaline earth metal carbonates, alkaline earth metal hydrogen carbonates, alkaline earth metal-C-C-alcoholates, and alkylamines with a total of 2 to 12 carbon atoms; c) at least one trihydrocarbylphosphane; and d) at least one organic reducing agent that is different from the remaining components that are used in the method.

Method for producing tetrakis (trihydrocarbyl phosphane) palladium(0)

Preparations of platinum complexes

Composition for use as catalyst in hydrosilylations, comprising at least one platinum compound selected from the group consisting of Pt[(MeSiCH&#x2550;CH)O]and Pt[(MeSiCH&#x2550;CH)O]and at least one rhodium compound selected from the group consisting of Rh(acac)(CO), Rh(CO)Cl, [Rh(cod)Cl], Rh(acac)(cod), RhH(CO)(PPh), Rh(CO)(PPh)(acac), RhCl(CO)(PPh), and Rh-2-ethylhexanoate at a molar ratio of Pt/Rh in the range of 0.1 to 100.

Synergistic combinations of platinum compounds and rhodium compounds as catalysts in hydrosilylations

Process for the production of high purity iridium(III) chloride hydrate, comprising the steps of:

Process for the production of high purity iridium(III)chloride hydrate

Processes produce catalytically highly effective noble metal carboxylate compounds or their solutions that comprise A) a noble metal carboxylate, wherein the noble metal is selected from the group consisting of ruthenium, platinum, palladium, rhodium and gold, and B) at least one compound selected from the group consisting of oxalic acid, a salt of oxalic acid, a derivative of oxalic acid and a salt of the derivative of oxalic acid. The process digests the noble metal with alkaline earth peroxide to produce a digestion mass and dissolves the digestion mass in a carboxylic acid or a carboxylic acid diluted with a protic solvent to produce a resulting solution, whereby alkaline earth ions are separated off as salt of an oxalic acid or salt of oxalic acid derivatives, and the processes do not include any BaSO4 precipitation and filtration of barium sulphate.

Catalytically highly effective precious metal-carboxylate compounds of Ir, Ru, Rh, Pd and Au

Method for the production of tetrakis(trihydrocarbyl phosphane)palladium(0)

A known method for producing porous graphitized carbon material covered with metal nanoparticles involves infiltrating a porous template framework of inorganic material with a carbon precursor. After thermal treatment of the precursor, the template is removed and the particulate porous carbon material is covered with a catalytically active substance. According to the invention, in order to keep the proportion of the noble metal loading at a low level, the thermal treatment of the precursor first involves carbonization, and the material is not graphitized into graphitized, particulate, porous carbon material until the template has been removed. The graphitized carbon material has a hierarchical pore structure with a pore volume of at least 0.5 cm/g and at least 75% of the pore volume is apportioned to macropores with, size 100 to 5000 nm. Before covering with catalytically active substance, the carbon material is subjected to an activation treatment in an oxidizing atmosphere.

Catalyst support and method for producing porous graphitized carbon material covered with metal nanoparticles

Process for catalytic oxidative removal of at least one oxidisable gaseous compound from a gas mixture comprising the at least one oxidisable gaseous compound as well as oxygen through the use of an oxidation catalyst, whereby the gas mixture is not a combustion flue gas, characterised in that the oxidation catalyst was produced through the use of at least one exothermic-decomposing platinum precursor.

Process for removing oxidisable gaseous compounds from a gas mixture by means of a platinum-containing oxidation catalyst

The production of noble metal oxalate complexes from noble metal precursors and oxalic acid and/or oxalic acid salts is an exothermic reaction, in which heat and COare produced, is described. The temperature can increase above the decomposition point of the noble metal oxalate complexes in the course of the reaction, which simultaneously releases more CO. For safety reasons, when the reaction is carried out on a large scale, it is therefore necessary to take into consideration that the product must not be decomposed by heat that is produced during the reaction. Therefore, according to the invention, a method for the production of noble metal oxalate complexes is provided, in which the product noble metal oxalate complexes are added to the reaction mixture as an auto-catalyst.

Method for the production of noble metal oxalate complexes

Palladium(0)-dibenzylidene acetone complexes Pd(dba), with y/x being from 1.5 to 3, are provided according to the invention at a purity of at least 99.5 wt. %. The use of said Pd(dba)complexes according to the invention is for determining their stoichiometry by means of elemental analysis. In the method for the production of Pd(dba)complexes from a Pd-containing educt and dibenzylidene acetone (dba) in alcohol, according to the invention a solution of the dba in alcohol pre-heated to more than 40&#xb0; C. is provided first and then the Pd-containing educt is added to the pre-heated solution upon which the complexes are precipitated by a base.

Palladium(0)-dibenzylidene acetone complexes

A process is described for the manufacture of chlorotris(triphenylphosphine)-rhodium(1) by means of causing a reaction of RhClsolution with triphenylphosphin in mixtures of C2&#x2013;C5 alcohols with water subsequently cooling down and filtering the crystalline precipitate obtained characterized in that the mixture of the reactants is handled in such a way that  The technique leads to improvements in the yield and quality of the crystals obtained.

Method for producing chlorotris(triphenylphosphine) rhodium (i)

A process for producing platinum alkenyl polysiloxane complex compounds, especially platinum divinyltetramethyldisiloxane, by reacting a haloplatinum compound with at least one alkenyl polysiloxane in the initial presence of platinum in the form of a platinum complex compound as an autocatalyst and in the initial presence of at least one base in an organic solvent or mixture of organic solvents that can be oxidized by the haloplatinum compound.

Process for producing platinum alkenyl polysiloxane complex compounds, especially platinum divinyltetramethyldisiloxane

A method for producing a cyanide-free solution of a gold compound that is suitable for gold electrodeposition baths. The method includes the steps of reacting at least one of a cysteine and a cysteinate with at least one of tetrachloroauric acid and a tetrachloroaurate in a first aqueous medium, separating a resulting precipitate from the first aqueous medium, and dissolving the precipitate in a second aqueous medium with elevation of the pH to 12.0-14.0.

Method for producing a cyanide-free solution of a gold compound that is suitable for galvanic gold baths

Growing community of inventors

Alzenau, Germany

Richard Walter