Patent application number | Description | Published |
20080249300 | Coammoxidation of Ketones - The invention relates to a method for the coammoxidation, i.e. for the simultaneous ammoxidation of ketones, especially of cyclic ketones such as cyclododecanone and cyclohexanone. The ammoxidatian method of the invention relates to the production of oximes from ketones or aldehydes using hydrogen peroxide and amnmonia and further using a catalyst that substantially consists of silicon, titanium and oxygen, such as for example titanium silicalite. | 10-09-2008 |
20090088567 | PURIFICATION OF A CRUDE LACTAM MIXTURE BY MEANS OF MELT CRYSTALLIZATION - The present invention provides a method for purifying laurolactam from a crude lactam mixture. In the method of the present invention, laurolactam is selectively crystallized by melt crystallization with controlled cooling of the crude lactam mixture. | 04-02-2009 |
20090306367 | PROCESS FOR PREPARING AMIDES FROM KETOXIMES - The present invention is directed to a process for preparing amides. In particular, the process is directed to a process performable on the industrial scale, in which a ketoxime can be converted to a cyclic or acyclic amide by means of a Beckmann rearrangement using 2,4,6-trichloro-1,3,5-triazine as a catalyst in a nonpolar organic solvent. | 12-10-2009 |
20100063323 | Reactor having titanium silicate recycling - The invention relates to a plant for carrying out chemical reactions, having a reactor ( | 03-11-2010 |
20100312012 | UNSATURATED DICARBOXYLIC ACIDS FROM UNSATURATED CYCLIC HYDROCARBONS AND ACRYLIC ACID BY WAY OF METATHESIS, THE USE THEREOF AS MONOMERS FOR POLYAMIDES, POLYESTERS AND POLYURETHANES, AND SUBSEQUENT REACTION TO DIOLS AND DIAMINES - The invention relates to a method for producing α/β-unsaturated dicarboxylic acids and the corresponding saturated dicarboxylic acids, whereby the corresponding cycloalkene and acrylic acid are reacted with a ruthenium catalyst by way of a metathesis reaction at high substrate concentrations until the reaction takes place in substance, the resulting dicarboxylic acid being precipitated. | 12-09-2010 |
20110015434 | METHOD FOR PRODUCING DODECA-2,10-DIENE-1,12-DICARBOXYLIC ACID OR 1,12-DODECANE-DICARBOXYLIC ACID BY WAY OF RING-OPENING CROSS METATHESIS (ROCM) OF CYCLOOCTENE WITH ACRYLIC ACID - The invention relates to a method for producing 1,2-dodeca-2,10-diene diacid and 1,12-dodecanoic acid whereby cyclooctene and acrylic acid are reacted with a ruthenium catalyst by way of a metathesis reaction at high substrate concentrations until the reaction takes place in substance, the resulting unsaturated dicarboxylic acid being precipitated and being hydrated in a second reaction step. | 01-20-2011 |
20110124855 | METHOD FOR ISOLATION OF LAUROLACTAM FROM A LAUROLACTAM SYNTHESIS PROCESS STREAM - A process for purifying laurolactam by means of integrated connection of distillation and crystallization is provided. The crystallization is performed as a solution or melt crystallization. The process reduces thermal stress applied to the laurolactam stream and improved yields are obtained. Raw materials are recovered and recycled in the production sequence. | 05-26-2011 |
20120022276 | METHOD FOR PRODUCING ALDEHYDE FUNCTIONAL COMPOUNDS - The invention relates to a method for producing aldehyde functional compounds by a cross-metathesis reaction of an olefinic compound having at least one hydroxy group and at least one C—C double bond with at least one at least monounsaturated fatty acid or at least one at least monounsaturated fatty acid derivative, in the presence of a metathesis catalyst at a maximum temperature of 180° C. and in the presence of at least one reagent that acts as a protective group-forming compound in relation to the aldehyde group of the aldehyde functional compounds. | 01-26-2012 |
20120095161 | MOLDING COMPOUND ON THE BASIS OF A COPOLYAMIDE CONTAINING TEREPHTHALIC ACID AND TRIMETHYLHEXAMETHYLENE DIAMINE UNITS - A molding compound, containing at least 30% by weight of a copolyamide, which is derived from the following monomers: a) 50 to 95 mole percent of the combination of a diamine, selected from the group consisting of 1,9-nonane diamine, 1,10-decane diamine, 1,11-undecane diamine and 1,12-dodecane diamine, and terephthalic acid, and b) 5 to 50 mole percent of the combination of a diamine, selected from the group consisting of 2,2,4-trimethylhexamethylene diamine, 2,4,4-trimethylhexamethylene diamine, and mixtures thereof, and terephthalic acid. The copolyamide is crystalline and has low water absorption. | 04-19-2012 |
20120203033 | PREPARATION OF PRIMARY DIAMINES HAVING A LINEAR MAIN CHAIN FOR POLYAMIDE SYNTHESES - The invention provides a method to produce primary diamines by catalytic conversion of diols having a linear main chain of from 4 to 31 carbon atoms into the corresponding diamines. The reaction is conducted in a liquid or supercritical phase and is catalyzed by a homogeneous ruthenium-containing complex. The primary diamines obtained may be suitable for polyamide syntheses. | 08-09-2012 |
20120245375 | SYNTHESIS OF ALPHA,OMEGA-DICARBOXYLIC ACIDS AND ESTERS THEREOF FROM UNSATURATED FATTY ACID DERIVATIVES - A process for preparing an alpha, omega-dicarboxylic acid or an ester thereof, which includes (a) subjecting at least one unsaturated fatty acid or fatty acid derivative to ozonolysis to obtain an ozonolysis reaction mixture; and (b) oxidizing the ozonolysis reaction mixture with an oxidizing agent in the presence of an acid catalyst to obtain an oxidized reaction mixture comprising at least one alpha, omega-dicarboxylic acid or ester; wherein the process is performed using a solvent and the acid catalyst has a pKa of less than or equal to zero, as measured at 25° C. | 09-27-2012 |
20130078685 | OZONOLYSIS OF UNSATURATED FATTY ACIDS AND DERIVATIVES THEREOF - The invention relates to a method for the ozonolysis of unsaturated fatty acids and derivatives thereof, comprising a) ozonolysis of a fatty acid or of a derivative thereof in an organic phase comprising an organic solvent, and b) contacting the organic phase with an aqueous phase comprising catalase and preferably a buffer, where the fatty acid or the derivative thereof has a linear chain having at least eight carbon atoms, and the use of catalase for removing reactive oxygen species from a reaction mixture comprising ozonolysis products of an unsaturated fatty acid. | 03-28-2013 |
20130165685 | SYNTHESIS OF OMEGA-AMINO CARBOXYLIC ACIDS AND THEIR ESTERS FROM UNSATURATED FATTY ACID DERIVATIVES - The invention relates to a process for preparing omega-amino acids or their esters, which is characterized by the following steps:
| 06-27-2013 |
20130172635 | METHOD FOR PRODUCING FLUID, COLOURLESS POLYOCTENAMER BY RING-OPENING, METATHETIC POLYMERIZATION OF CYCLOOCTENE - A polyoctenamer is described which at room temperature is liquid, colourless and clear, and which is produced by ring-opening, metathesis polymerization of cyclooctene. | 07-04-2013 |
20140039210 | LIQUID CATION EXCHANGER - The invention relates to a method for removing an organic compound having one or more positive charges from an aqueous solution. Said method consists of the following steps a) the aqueous solution containing the organic compound, and a hydrophobic organic solution which contains a hydrophobic liquid cation exchanger having one or more negative charges and a negative total charge, are provided, b) the aqueous solution and the organic solution are brought into contact with each other and c) the organic solution is separated from the aqueous solution. | 02-06-2014 |
20140054224 | LIQUID CATION EXCHANGER - The present application relates to a process for removing an organic compound having one or more positive charges from an aqueous solution, comprising the steps a) provision of the aqueous solution comprising the organic compound and of a hydrophobic organic solution which comprises a liquid cation exchanger, where the liquid cation exchanger is hydrophobic, and where the liquid cation exchanger has one or more negative charges and an overall negative charge, b) contacting the aqueous solution and the organic solution, and c) separating off the organic solution from the aqueous solution. | 02-27-2014 |
20140249331 | PROCESS FOR PREPARING KETONES FROM EPOXIDES - A process for preparing a ketone by conversion of a compound E which contains an epoxy group to the ketone in the presence of a mixture comprising at least one noble metal and at least one metal oxide as a catalyst system, wherein the metal oxide in the catalyst system is at least one of titanium dioxide and zirconium dioxide, and the process is conducted at 0 to 0.9 bar of hydrogen. | 09-04-2014 |