Abstract: Preparation of cyclododecatriene in a continuous or discontinuous process by trimerization of butadiene in the presence of a catalyst system and a solvent, the crude cyclododecatriene obtained being able to be isolated by means of distillation. The cyclooctadiene formed as by-product can likewise be isolated from the crude product.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a plant for carrying out chemical reactions, having a reactor (1), the reaction space of which contains hydrogen peroxide (H2O2) and titanium silicalite (TS-1). The object of the invention is to improve such a plant such that continuous separation and recycling of the active catalyst to the reaction space is possible with a long filter service life. This is achieved in that the reaction space contains a solid silicon source, in that the plant comprises a water takeoff line (3) which is set up for drawing off water in addition to components which are dissolved and/or dispersed therein from the reaction space, in that the water takeoff line (3) leads to a filter (4) which separates off the components which are dissolved and/or dispersed in the water, and in that the plant has a return line (5) which is set up for recirculating to the reaction space components which are separated off by means of the filter (4).

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a method for producing ?/?-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.

Abstract: 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.

Abstract: The invention relates to a plant for carrying out chemical reactions, having a reactor (1), the reaction space of which contains hydrogen peroxide (H2O2) and titanium silicalite (TS-1). The object of the invention is to improve such a plant such that continuous separation and recycling of the active catalyst to the reaction space is possible with a long filter service life. This is achieved in that the reaction space contains a solid silicon source, in that the plant comprises a water takeoff line (3) which is set up for drawing off water in addition to components which are dissolved and/or dispersed therein from the reaction space, in that the water takeoff line (3) leads to a filter (4) which separates off the components which are dissolved and/or dispersed in the water, and in that the plant has a return line (5) which is set up for recirculating to the reaction space components which are separated off by means of the filter (4).

Abstract: 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.

Abstract: The present invention relates to a process for the coammoximation, that is to say for the simultaneous ammoximation, of ketones, in particular of cyclic ketones such as cyclododecanone and cyclohexanone. Ammoximation is taken to mean here the preparation of oximes from ketones or aldehydes together with hydrogen peroxide and ammonia and in the presence of a catalyst which essentially consists of silicon, titanium and oxygen, for example titanium silicalite.

Abstract: 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.

Abstract: The invention concerns a process for purification of an acidic monomer having a double bond, as well as a device for synthesis of an acidic monomer having a double bond, a process for producing an acidic monomer having a double bond, an acid monomer having a double bond and obtainable by this process, fibers, formed bodies, films, foams, superabsorbent polymers and other special polymers based on or containing this acidic monomer, the use of this acidic monomer in or for producing fibers, formed bodies, films, foams, superabsorbent polymers or other special polymers.

Abstract: 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.

Abstract: Preparation of cyclododecatriene in a continuous or discontinuous process by trimerization of butadiene in the presence of a catalyst system and a solvent, the crude cyclododecatriene obtained being able to be isolated by means of distillation. The cyclooctadiene formed as by-product can likewise be isolated from the crude product.

Abstract: A process for preparing cyclododecene by selective gas-phase hydrogenation of at least one starting material selected from cyclododecatriene, cyclododecadiene and mixtures thereof, wherein the starting material present in the gas phase is hydrogenated in the presence of a catalyst in a fixed-bed reactor and the Bodenstein number for the process is greater than 100.

Abstract: The present invention concerns a process for separation of a monomer including at least one double bond, hereafter referred to as “monomer,” in particular (meth)acrylic acid, from a composition Z including this monomer and at least one impurity different to the monomer, including the steps of bringing into contact of the composition Z with an additive by forming a separation phase. The additive has a melting point of at most about 150° C. and a vapour pressure at a temperature of 20° C. of at most about 1 mbar. The monomer is then separated from the separation phase. A device for producing a monomer, the use of additives in the separation of a monomer from a monomer-comprising composition, the monomer obtainable by the process according to the invention, chemical products comprising the monomer as well as the use of the monomer in or for production of chemical products.

Abstract: Degradation acids obtained in the synthesis of carboxylic acids, in particular dicarboxylic acids, having from 8 to 16 carbon atoms may be isolated by separating the degradation acids in the form of a solid from the crude reaction mixture, then washing the degradation acids in the form of an oil with water at an elevated temperature. The resulting degradation acids having low oxidant and metal contents, and the metal catalyst may be recirculated back to the process.

Abstract: The invention concerns a process for purification of an acidic monomer having a double bond, as well as a device for synthesis of an acidic monomer having a double bond, a process for producing an acidic monomer having a double bond, an acid monomer having a double bond and obtainable by this process, fibres, formed bodies, films, foams, superabsorbent polymers and other special polymers based on or containing this acidic monomer, the use of this acidic monomer in or for producing fibres, formed bodies, films, foams, superabsorbent polymers or other special polymers.