Abstract:
The invention relates to a method for producing hexamethylenediamine, wherein a) a muconic acid starting material is provided, which is selected from among muconic acid, esters of muconic acid, lactones of muconic acid, and mixtures thereof, b) the muconic acid starting material is subjected to a reaction with hydrogen in the presence of at least one hydrogenation catalyst in order to form 1,6-hexanediol, and c) the 1,6-hexanediol obtained in step b) is subjected to amination in the presence of an amination catalyst in order to obtain hexamethylenediamine. The invention further relates to hexamethylenediamine which can be produced by means of said method.
Abstract:
The invention relates to a method for preparing 1,6-hexanediol in which a) a muconic acid feedstock is provided that is selected from among muconic acid, muconic acid esters, muconic acid lactones, and mixtures thereof, b) the muconic acid feedstock is subjected to a reaction with hydrogen in the presence of at least one hydrogenation catalyst to obtain 1,6-hexanediol, and c) the output from the hydrogenation process in step b) is subjected to distillative separation so as to obtain 1,6-hexanediol.
Abstract:
The present invention is directed towards aqueous formulations comprising (A) at least one alkoxylated polypropylenimine, (B) at least one non-ionic surfactant, selected from (B1) alkyl polyglycosides and (B2) alkoxylated C 8 -C 14 -Guerbet alcohols.
Abstract:
The present invention relates to a process for hydrogenating organic nitriles by means of hydrogen in the presence of a catalyst in a reactor, where the shaped body catalyst is arranged in a fixed bed, wherein the shaped body in the shape of spheres or rods has in each case a diameter of 3 mm or less, in the shape of tablets a height of 4 mm or less, and in the case of all other geometries in each case has an equivalent diameter L = 1/a' of 0.70 mm or less, where a' is the external surface area per unit volume (mms 2/mmp 3), with: (I) where Ap is the external surface area of the catalyst particle (mms 2) and Vp is the volume of the catalyst particle (mmp 3). The present invention further relates to a process for preparing downstream products of isophoronediamine (IPDA) or N,N-dimethylaminopropylamine (DMAPA) from amines prepared according to the invention.
Abstract:
The present application relates to a method for producing unsymmetrical secondary tert-butyl amines by continuous amination in the gas phase, wherein tert-butyl amine is reacted in the presence of an alcohol or aldehyde and hydrogen on hydrogenation catalysts.
Abstract:
The present invention relates to the use of essentially linear polypropyleneimine as curing agent for epoxide resins, and to a corresponding curable composition, the curing thereof and the cured epoxide resin obtainable therefrom.