Basf Se Corporation

Alexander Duefert

Rolf Pinkos

Florian Garlichs

Miriam Bru Roig

Kai Thiele

Gerhard Theis

Andreas Weickgenannt

Wolf-Steffen Weissker

Michael Reiser

Viktor Ladnak

Silvia Tauro

Philipp Brueggemann

Philipp Brüggemann

The present invention relates to a process for hydrogenating a mixture (G1) in the presence of a catalyst, where the mixture (G1) comprises at least one colorless amine and at least one color-imparting component. As a result of the hydrogenation step, the at least one color-imparting component is firstly partially, preferably fully, hydrogenated, while the colorless amine, in particular aniline, is not hydrogenated or hydrogenated to only a very small extent. The color-imparting components which cause the discoloration of the amine which is itself in principle colorless are thus removed by hydrogenation, as a result of which purification of the colorless amine or the mixture (G1) is achieved.

Process for hydrogenating a mixture in the presence of a colorless amine

Processes for preparing tetrahydrofuran and/or butane-1,4-diol and/or gamma-butyrolactone are provided, including a process for preparing tetrahydrofuran (THF) from succinic acid that has been obtained by conversion of biomass, by conversion of the succinic acid to succinic anhydride, and hydrogenation of the succinic anhydride, with removal of certain secondary components.

Method for producing tetrahydrofurane, 1,4-butanediol or gamma-butyrolactone

Process for preparing monoethylene glycol (MEG) by metal-catalyzed reaction of a dialkyl oxalate of the formula I where Rand Rare each, independently of one another, methyl, ethyl, n-propyl or isopropyl, with hydrogen (H), wherein the dialkyl oxalate (I) is used as melt or as a solution in a solvent, dialkyl oxalate (I) and Hare used in a molar ratio of H:dialkyl oxalate (I) in the range from 4.0 to 30 and the reaction is carried out continuously in a reactor at a cross-sectional loading of &#x2265;10 m/s, a temperature in the range from 150 to 270&#xb0; C., a pressure in the range from 150 to 390 bar and in the presence of a chromium-free heterogeneous catalyst comprising copper.

Method for producing monoethylene glycol

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Ludwigshafen, Germany

Alexander Duefert