Disclosed are catalysts comprised of platinum and gold. The catalysts are generally useful for the selective oxidation of compositions comprised of a primary alcohol group and at least one secondary alcohol group wherein at least the primary alcohol group is converted to a carboxyl group. More particularly, the catalysts are supported catalysts including particles comprising gold and particles comprising platinum, wherein the molar ratio of platinum to gold is in the range of about 100:1 to about 1:4, the platinum is essentially present as Pt(0) and the platinum-containing particles are of a size in the range of about 2 to about 50 nm. Also disclosed are methods for the oxidative chemocatalytic conversion of carbohydrates to carboxylic acids or derivatives thereof. Additionally, methods are disclosed for the selective oxidation of glucose to glucaric acid or derivatives thereof using catalysts comprising platinum and gold. Further, methods are disclosed for the production of such catalysts.

The present invention relates to a process for separating at least one alkanolamine from a mixture comprising an aliphatic primary diamine and the at least one alkanolamine. The invention further relates to a process for the preparation of an aliphatic primary diamine by hydrogenating a dinitrile compound and separating at least one alkanolamine from the obtained mixture and to the aliphatic primary diamine obtainable by said processes.

The present invention relates to a process for separating at least one alkanolamine from a mixture comprising an aliphatic primary diamine and the at least one alkanolamine. The invention further relates to a process for the preparation of an aliphatic primary diamine by hydrogenating a dinitrile compound and separating at least one alkanolamine from the obtained mixture and to the aliphatic primary diamine obtainable by said processes.

A process for purifying and/or preparing hexamethylenediamine by hydrogenating adiponitrile in the presence of a hydrogenation catalyst and purifying the thus obtained mixture of hexamethylenediamine, impurities, and water.

A process for purifying and/or preparing hexamethylenediamine by hydrogenating adiponitrile in the presence of a hydrogenation catalyst and purifying the thus obtained mixture of hexamethylenediamine, impurities, and water.

The invention relates to a method for preparing a suspension of a hydrochloride of an organic amine, comprising the following steps of (i) initially charging at least one organic solvent in a reaction vessel to form a liquid level, (ii) adding hydrogen chloride, (iii) adding the organic amine, wherein the organic amine is added below the liquid level present in the reaction vessel and steps (ii) and (iii) are at least partly carried out simultaneously. Furthermore, the present invention also relates to a method wherein the suspension obtained after step (iii) is reacted in a step (iv) with phosgene to obtain the organic isocyanate corresponding to the organic amine used, to the corresponding organic isocyanate and to the use of the organic isocyanate for producing polyisocyanates.

The invention relates to a method for preparing a suspension of a hydrochloride of an organic amine, comprising the following steps of (i) initially charging at least one organic solvent in a reaction vessel to form a liquid level, (ii) adding hydrogen chloride, (iii) adding the organic amine, wherein the organic amine is added below the liquid level present in the reaction vessel and steps (ii) and (iii) are at least partly carried out simultaneously. Furthermore, the present invention also relates to a method wherein the suspension obtained after step (iii) is reacted in a step (iv) with phosgene to obtain the organic isocyanate corresponding to the organic amine used, to the corresponding organic isocyanate and to the use of the organic isocyanate for producing polyisocyanates.

The present invention relates to a method for preparing primary diamines from amino acid compounds. Specifically, this invention is related to the preparation of a primary diamine from an amino acid and/or its salt by Kolbe electrolysis coupling reaction.

The present invention relates to a method for preparing primary diamines from amino acid compounds. Specifically, this invention is related to the preparation of a primary diamine from an amino acid and/or its salt by Kolbe electrolysis coupling reaction.

The present invention relates to a method for preparing primary diamines from amino acid compounds. Specifically, this invention is related to the preparation of a primary diamine from an amino acid and/or its salt by Kolbe electrolysis coupling reaction.