公开(公告)号：US10336668B2

公开(公告)日：2019-07-02

申请号：US15529133

申请日：2015-11-18

Applicant: BASF SE

Inventor： Jan-Oliver Weidert ,  Sandra Kramp ,  Regina Benfer ,  Alexander Panchenko ,  Andreas Weickgenannt ,  Norbert Gutfrucht ,  Klaus Breuer ,  Artur Kozicki ,  Ralph Busch

IPC: C07C7/04 ,  B01D3/00 ,  B01D3/10 ,  C07C209/86 ,  C07C211/36

Abstract: A process for preparing trans-enriched MDACH, including: distilling an MDACH starting mixture in the presence of an auxiliary, which is an organic compound having a molar mass of 62 to 500 g/mol, a boiling point at least 5° C. above the boiling point of cis,cis-2,6-diamino-1-methylcyclohexane, and 2 to 4 functional groups, each of which is independently an alcohol group or a primary, secondary or tertiary amino group. The MDACH starting mixture includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, based on the total amount of MDACH present in the MDACH starting mixture. The MDACH starting mixture includes both trans and cis isomers. Trans-enriched MDACH includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, where the proportion of trans isomers in the mixture is higher than the proportion of trans isomers in the MDACH starting mixture.

公开(公告)号：US10329238B2

公开(公告)日：2019-06-25

申请号：US15776603

申请日：2016-11-30

Applicant: BASF SE

Inventor： Andreas Weickgenannt ,  Sandra Kramp ,  Jan-Oliver Weidert ,  Alexander Panchenko ,  Artur Kozicki ,  Ralph Busch

IPC: C07C209/88 ,  C07C211/36

Abstract: A method for isomerizing a starting mixture comprising 2,4-diamino-1-methylcyclohexane, 2,4-MDACH for short, 2,6-diamino-1-methylcyclohexane, 2,6-MDACH for short, or mixtures thereof, wherein the isomerization is carried out in the presence of a supported catalyst with zirconium dioxide as support and ruthenium as active metal.