Abstract: The invention relates to a method for the manufacture of cyanopyridines from methylpyridines by their conversion with ammonia and oxygen and catalysts suitable therefor which contain further transition metals in addition to vanadium and phosphorus.

Abstract: A manganese dioxide catalyst for hydrolysing organic nitrites which bear readily oxidizable groups such as thiol or thioether groups to the corresponding carboxamides, and to a process for preparing the catalyst and to its use for hydrolysing organic nitrites.

Abstract: The invention relates to recombinant microorganisms which, in comparison to the starting organism, have a higher concentration or activity of a D-amino acid oxidase, of an L-amino acid dehydrogenase, of an NADH cosubstrate regenerating enzyme and, if necessary, of a catalase. The invention also includes methods for preparing L-amino acids from D-amino acids using of these microorganisms.

Abstract: A process for the preparation of ?-substituted carboxylic acids from the series including ?-hydroxycarboxylic acids and N-substituted-?-aminocarboxylic acids by cathodic carboxylation with carbon dioxide of a compound corresponding to the general formula R1—C(?X)R2 which is constituted by aldehydes, ketones or N-substituted imines. In the past, that carboxylation has taken place in an undivided electrolytic cell with the use of a sacrificial anode. As described herein, the carboxylation takes place in the absence of a sacrificial anode in an electrolytic cell divided by a separator, at a diamond film cathode. The anode is formed of a material which is stable under electrolytic conditions; in particular, it is a diamond film electrode. The catholyte includes an organic solvent and a conducting salt.

Abstract: The present invention is directed to a nucleotide sequence encoding D-amino oxidase (D-AAO, EC 1.4.3.3) from Arthrobacter protophormiae. This may be inserted into an expression and used to transform a microbial host. The transformed microbial hosts ecomically produce D-AAO which may be used to oxidize D-amino acids.

Abstract: The invention relates to a process for the preparation of methionine of high bulk density, in which a mixture which comprises a compound which has a foaming action and a compound which influences the crystallization is added to the hydrolysis solution, and to the mixture itself.

Abstract: The invention relates to an improved method for the anodic alkoxylation of an organic compound with an alcohol comprising between 1 and 4 C atoms, in particular methanol, in a reactor comprising a membrane electrode assembly (MEA). The invention uses a reactor comprising an MEA that contains a cation exchange membrane or a microporous polypropylene membrane, whereby one or both electrode layers were created using carbon black and/or graphite, optionally doped with a heavy metal and a sulfonated, polyfluorinated polymer or copolymer in a liquid suspension containing a suspension medium.

Abstract: The invention relates to a method for filling apparatuses for chemical production with solids using a controllable metering device, and an apparatus, displaceable from place to place, for carrying out the method. The apparatus is suitable in particular for filling heat exchangers, absorption columns, distillation columns or tube-bundle reactors with solids.

Abstract: The invention relates to a process for the continuous production of methylmercaptan by reacting a starting gas mixture of methanol and hydrogen sulphide in the gas phase at a reaction temperature between 200 and 600° C. and an operating pressure of 1.5 to 40 bar on a catalyst in a multi-bed reactor.

Abstract: A method for preparing 3-(methylthio)propanal and 2-hydroxy-4-(methylthio)butanenitrile by catalyzed addition of methylmercaptan to acrolein and hydrogen cyanide to 3-(methylthio)propanal.

Abstract: The invention relates to a process for the production of 3-(alkylthio)propanal from glycerol using catalysts.

Abstract: The invention relates to a process for the production of 2-hydroxy-4-methylthiobutyric acid ammonium salt from 2-hydroxy-4-methylthiobutyronitrile, and to the use of the 2-hydroxy-4-methylthiobutyric acid ammonium salt produced by this process.

Abstract: Organic substrates, such as cyclic ethers, N-substituted amides, ketones, alkyl-aromatic substances and alkyl-heteroaromatic substances can be anodically alkoxylated, especially methoxylated, in the presence of an alcohol. Alkoxylation in the presence of a mediator or in a divided cell using a solid electrolyte is known. The anodic alkoxylation according to the invention is carried out in the absence of a mediator in an undivided electrolytic cell using a diamond anode or gold anode and allows for high yields and a high current efficiency.

Abstract: The invention relates to a halide-containing alkali tungstate catalyst for the synthesis of alkylmercaptans from alkanols and hydrogen sulfide, and to a process for the preparation of this catalyst.

Abstract: The invention relates to a Rhodococcus polynucleotide cluster which contains nucleotide sequences which encode polypeptides having the activity of a nitrile hydratase, of an auxiliary protein P15K which activates this enzyme and of a cobalt transporter, to transformed microorganisms in which the nucleotide sequences encoding these proteins are present in increased quantity, and to the use of the transformed microorganisms for preparing amides from nitriles.

Abstract: The invention relates to recombinant microorganisms which, in comparison to the starting organism, have a higher concentration or activity of a D-amino acid oxidase, of an L-amino acid dehydrogenase, of an NADH cosubstrate regenerating enzyme and, if necessary, of a catalase. The invention also includes methods for preparing L-amino acids from D-amino acids using of these microorganisms.

Abstract: A method for preparing 3-(methylthio)propanal and 2-hydroxy-4-(methylthio)butanenitrile by catalyzed addition of methylmercaptan to acrolein and hydrogen cyanide to 3-(methylthio)propanal.

Abstract: The invention relates to a method for measuring the uniform filling of reactors or columns with solid matter and an apparatus for carrying out the method.

Abstract: A method for removal of dissolved oxygen from organic liquids by use of a solid state catalyst. In doing so the dissolved oxygen is converted by the action of a reducing agent into water.

Abstract: The invention relates to a process for the preparation of methionine of high bulk density, in which a mixture which comprises a compound which has a foaming action and a compound which influences the crystallization is added to the hydrolysis solution, and to the mixture itself.