公开(公告)号：US20180222830A1

公开(公告)日：2018-08-09

申请号：US15747809

申请日：2016-07-26

Applicant: BASF SE

Inventor： Alexander DUEFERT ,  Rolf PINKOS ,  Michael REISER ,  Philipp BRUEGGEMANN ,  Gerhard THEIS

IPC: C07C29/149

CPC classification number: C07C29/149 ,  B01J21/02 ,  B01J23/72 ,  C07C29/90 ,  C07C31/202 ,  C07C67/08 ,  C07C31/20

Abstract: Process for preparing monoethylene glycol (MEG) by metal-catalyzed reaction of a dialkyl oxalate of the formula I where R1 and R2 are each, independently of one another, methyl, ethyl, n-propyl or isopropyl, with hydrogen (H2), wherein the dialkyl oxalate (I) is used as melt or as a solution in a solvent, dialkyl oxalate (I) and H2 are used in a molar ratio of H2: 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 10 m/s, a temperature in the range from 150 to 270° C., a pressure in the range from 150 to 390 bar and in the presence of a chromium-free heterogeneous catalyst comprising copper.

公开(公告)号：US20210061751A1

公开(公告)日：2021-03-04

申请号：US16644340

申请日：2018-09-06

Applicant: BASF SE

Inventor： Florian GARLICHS ,  Rolf PINKOS ,  Alexander DUEFERT ,  Miriam BRU ROIG

IPC: C07C69/757 ,  C07C43/184 ,  C07C43/196 ,  C11B9/00

Abstract: The present invention relates to the use of a compound of the general formula (I) wherein R1 is C1-C4-alkyl or —(C=0)—R3, R2 is hydrogen, C1-C4-alkyl or —(C=0)—R4, and R3 and R4, independently of one another, are selected from the group consisting of hydrogen and C1-C4-alkyl, a stereoisomer thereof or a mixture of stereoisomers thereof, as an aroma chemical, to aroma chemical compositions comprising at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, and to a method for preparing a fragranced ready-to-use composition, which comprises incorporating at least one compound of the general formula (I), a stereoisomer thereof or a mixture of stereoisomers thereof, into a ready-to-use composition. The present invention further relates to specific ethers and specific esters of the compounds of the general formula (I) and a method for their preparation.

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.