Abstract:
The invention relates to 3-hydroxypropionic acid esters, obtained by conversion of ethylene oxide with carbon monoxide in the presence of a cobalt catalyst, wherein poly-3-hydroxypropionate is obtained; and transesterification of the poly-3-hydroxypropionate with an alcohol in the presence of a transeseterification catalyst, wherein the 3-hydroxypropionic acid esters are obtained. The transesterification catalyst is a compound of the formula MLx, wherein M stands for a metal of the 2nd, 3rd, or 4th main group or the 3rd to 8th secondary group of the periodic system of the elements, L stands for a ligand, which directly bonds to an M via a C, an O, a P, an S and/or an N atom, and x is a whole number from 2 to 6.
Abstract:
The invention relates to a method for producing acrylic acid from ethylene oxide and carbon monoxide, in which ethylene oxide is carbonylated in a non-protic solvent with carbon monoxide in the presence of a Co-containing catalyst system to form poly-3-hydroxy propionate, the Co-content of the formed poly-3-hydroxy propionate is then reduced with the aid of water and/or an aqueous solution as a precipitation and/or washing liquid and the poly-3-hydroxy propionate is subsequently cleaved by thermolysis to form acrylic acid.
Abstract:
The invention relates to a method for producing carboxylic acid derivatives of general formula (1a): H-(C=0)-R (la), in which R is selected from the group comprising OR 1 and NR 2 R 3 , wherein R 1 is unsubstituted or at least monosubstituted C 1 -C 15 alkyl, C 5 -C 10 cycloalkyl, C 5 -C 10 heterocyclyl, C 5 -C 10 aryl, or C 5 -C 10 heteroaryl, wherein the substituents are selected from the group comprising C 1 -C 15 alkyl, C 1 -C 6 alkoxy, C 5 -C 10 cycloalkyl, and C 5 -C 10 aryl; R 2 and R 3 , independently of one another, are hydrogen or unsubstituted or at least monosubstituted C 1 -C 15 alkyl, C 5 -C 10 cycloalkyl, C 5 -C 10 heterocyclyl, C 5 -C 10 aryl, or C 5 -C 10 heteroaryl, wherein the substituents are selected from the group comprising C 1 -C 15 alkyl, C 5 -C 10 cycloalkyl, and C 5 -C 10 aryl, or R 2 and R 3 form a five- or six-membered ring together with the nitrogen atom, which ring optionally additionally contains one or more heteroatoms selected from O, S, and N, which heteroatom bears the substituent R 4 , wherein R 4 is hydrogen or C 1 -C 6 alkyl; by reacting a reaction mixture (Rg) containing carbon dioxide, hydrogen, and an alcohol of general formula (Ib): R 1 -OH (Ib), in which R 1 has the aforementioned meanings, or an amine of general formula (Ic): NHR 2 R 3 (Ic), in which R 2 and R 3 , independently of each other, have the aforementioned meanings, in a hydrogenation reactor in the presence of a catalyst containing gold at a pressure in the range of 0.2 to 30 MPa and a temperature in the range of 20 to 200 °C.
Abstract:
A method for producing acrylic acid by thermolysis of poly-3-hydroxy propionate in the presence of one or more specific tertiary amines as catalysts.