公开(公告)号：US20170260115A1

公开(公告)日：2017-09-14

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

CPC classification number: C07C7/04 ,  B01D3/007 ,  B01D3/10 ,  C07C209/86 ,  C07C209/88 ,  C07C211/36 ,  C07C2601/14

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：US20200339490A1

公开(公告)日：2020-10-29

申请号：US16475566

申请日：2018-01-24

Applicant: BASF SE

Inventor： Bernd HEIDA ,  Tobias KELLER ,  Jan-Oliver WEIDERT

IPC: C07C7/08 ,  B01D3/14 ,  B01D3/34 ,  B01D11/04

Abstract: Process for isolating pure 1,3-butadiene from a crude C4 fraction by extractive distillation using a selective solvent, wherein (a) the crude C4 fraction is introduced into a predistillation column, a first low boiler fraction comprising C3-hydrocarbons is taken off as overhead stream, a gaseous C4 fraction is taken off as side stream and a first high boiler fraction is taken off as bottom stream, (b) the gaseous C4 fraction is brought into contact with a selective solvent in at least one extraction column, giving an overhead fraction comprising butanes and butenes and a bottom fraction comprising 1,3-butadiene and selective solvent, (c) crude 1,3-butadiene is desorbed from the bottom fraction in at least one stripping column, with a stripped selective solvent being obtained and the stripped selective solvent being recirculated to the extraction column, and (d) at least part of the crude 1-3-butadiene is fed to a pure distillation column and a second high boiler fraction is separated off and a gaseous purge stream is taken off. Gaseous purge streams from the columns which are necessary in order to keep the concentration of molecular oxygen below a predetermined concentration limit are consolidated with output streams which are in any case provided for discharging other components in the process. The recirculation of the second high boiler fraction to a lower section of the predistillation column creates a further degree of freedom in operation of the pure distillation column.

公开(公告)号：US20180327347A1

公开(公告)日：2018-11-15

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

CPC classification number: C07C209/88 ,  C07C209/68 ,  C07C211/36 ,  C07C2521/06 ,  C07C2523/46 ,  C07C2601/14

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.

公开(公告)号：US20180361270A1

公开(公告)日：2018-12-20

申请号：US15741350

申请日：2016-06-29

Applicant: BASF SE

Inventor： Norbert ASPRION ,  Bernd HEIDA ,  Jan-Oliver WEIDERT ,  Ortmund LANG

IPC: B01D3/32 ,  B01D3/14 ,  B01D3/40

Abstract: A distillation device comprising a column for separating a feed stream into a head product stream, a bottom product stream and optionally one or more side extraction streams, having three or more cells in 5 series through which fluid flows, wherein at least the first cell is integrated into the bottom of the column, for multi-stage heating and partial evaporation of the liquid flowing through the cells with the exception of the liquid from the last cell in an evaporation stage.