公开(公告)号：US20190210955A1

公开(公告)日：2019-07-11

申请号：US16333142

申请日：2017-08-31

Applicant: BASF SE

Inventor： Andreas WEICKGENANNT ,  Silvia TAURO ,  Alexander DUEFERT ,  Viktor LADNAK ,  Kai THIELE

IPC: C07C209/72 ,  C07C209/84 ,  C07C263/10

CPC classification number: C07C209/72 ,  C07C209/82 ,  C07C209/84 ,  C07C209/90 ,  C07C263/10 ,  C07C211/46

Abstract: 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.

公开(公告)号：US20200339501A1

公开(公告)日：2020-10-29

申请号：US16071309

申请日：2017-01-12

Applicant: BASF SE

Inventor： Viktor LADNAK ,  Silvia TAURO ,  Kerstin HEINEN ,  Kal THIELE ,  Klause-Peter METZNER ,  Torsten MATTKE

IPC: C07C209/78 ,  C07C209/88 ,  B01D3/14

Abstract: A process for preparing an aromatic polyamine mixture including 4,4′-methylenedi(phenylamine) and higher homologues of MDA is provided. The process includes steps of (i) reaction of aniline with formaldehyde by means of an acid catalyst to form a crude product mixture (I), (ii) neutralization of the crude product mixture (I) and removal of the salts formed; (iii) isolation of aniline; (iv) distillation of the resulting crude product mixture so as to separate off (iv-1) a mixture (II) of MDA isomers (II-1) containing from 8 to 20% by weight of 4,4′-methylenedi(phenylamine) and not more than 0.3% by weight of secondary components (II-2) and (iv-2) a low boiler mixture of at least 55% by weight of secondary components (II-2) and MDA isomers (II-1); and (v) recirculation of the mixture (II).

公开(公告)号：US20250034070A1

公开(公告)日：2025-01-30

申请号：US18715783

申请日：2022-12-06

Applicant: BASF SE

Inventor： Florian WINKLER ,  Virginie LANVER ,  Nils BOTTKE ,  Manuel Frederik GENTZEN ,  Silvia TAURO

IPC: C07C41/09 ,  B01J8/06 ,  C07C29/154

Abstract: A process for synthesis of dimethyl ether is proposed, in which a feed gas mixture (E) containing carbon dioxide and/or carbon monoxide and hydrogen is guided through reaction tubes (1) of a cooled shell and tube reactor (10) that are equipped with a first catalyst and a second catalyst, in which the carbon dioxide present in the feed gas mixture (E) and/or the carbon monoxide present in the feed gas mixture is at least partly reacted over the first catalyst with the hydrogen present in the feed gas mixture to give methanol, and in which, in the same shell and tube reactor (10), the methanol is at least partly converted over the second catalyst to dimethyl ether. It is envisaged that the reaction tubes (1) are equipped with the first and second catalysts in the form of a structured bed, where the structured bed has two to four regions (11, 12, 13) in which the first and second catalysts are provided in different physical mixtures, where the regions (11, 12, 13) are arranged such that the concentration of the first catalyst increases in a flow direction through the reaction tubes (1). Also proposed is a plant (100) for implementation of such a process.