Basf Se Corporation

Olivier Abillard

Rolf Pinkos

Ralf Pelzer

Stefan Rittinger

Heiko Urtel

Daniel Urbanczyk

Tilman Sirch

Gerd-Dieter Tebben

Itamar Michael Malkowsky

Florian Stecker

Daniel Breuninger

Tobias Wabnitz

Lionel Gehringer

Rolf Tompers

Simone Lutter

Christoph Nuebling

Eva Kretzschmar

Eva Kleinmann

Gerd-Dieter Dr Tebben

Process for the continuous hydrogenation of a carboxylic acid (I) to an alcohol (II) by means of hydrogen at a temperature of from 100 to 300&#xb0; C. and a pressure of 10 to 33 MPa abs in a reactor tube through which axial flow occurs and which has a fixed-bed catalyst which is fixed therein and comprises at least one element from the group consisting of Re, Co and Cu, and in which the carboxylic acid (I) to be hydrogenated is present in a liquid mixture (III) comprising the carboxylic acid (I), water and alcohol (II), where the mixture (III) has an acid number of from 0.2 to 25 mg KOH/g and comprises at least 15% by weight of water and at least 20% by weight of alcohol (II) and the flow velocity of the flowing liquid calculated on the basis of the geometric cross-sectional area of the empty, catalyst-free reactor tube is from 10 to 50 m/h.

Method for hydrogenating carboxylic acids in order to form alcohols

The present invention relates to a process for hydrogenating oligo- and/or polyesters obtainable by esterifying a DCS with a diol or diol mixture, said hydrogenation being performed in the presence of a catalyst whose catalyst precursor comprises copper oxide, aluminum oxide and at least one oxide of lanthanum, of iron, of tungsten, of molybdenum, of titanium or of zirconium, and to a process for preparing 1,6-hexanediol by catalytically hydrogenating ester mixtures which comprise, as main components, oligo- and polyesters of adipic acid and 6-hydroxycaproic acid, and are obtained by esterifying DCS with diols, especially 1,6-hexanediol or diol mixtures.

Method for producing 1,6-hexanediol by hydrogenation of oligo- and polyesters

&#x3b3;-Hydroxycarboxylic esters and &#x3b3;-lactones which are suitable as flavors can be prepared by electrochemical reductive cross-coupling of &#x3b1;,&#x3b2;-unsaturated esters with carbonyl compounds in an undivided electrolysis cell having a cathode composed of lead, lead alloys, cadmium, cadmium alloys, mercury, steel, glassy carbon or boron-doped diamonds and a basic aqueous electrolyte comprising an electrolyte salt which suppresses the cathodic formation of hydrogen.

Process for the electrochemical preparation of gamma-hydroxycarboxylic esters and gamma-lactones

The present invention relates to a process for preparing plastics using 1,6-hexanediol having an aldehyde content of less than 500 ppm, a process for preparing 1,6-hexanediol having an aldehyde content of less than 500 ppm and also 1,6-hexanediol having an aldehyde content of less than 500 ppm.

Process for preparing plastics using 1,6-hexanediol having an aldehyde content of less than 500 ppm

Growing community of inventors

Mannheim, Germany

Olivier Abillard