公开(公告)号：US20230249098A1

公开(公告)日：2023-08-10

申请号：US18012996

申请日：2021-06-17

Applicant: BASF SE

Inventor： Bernd METZEN ,  Christian KUNKELMANN ,  Ortmund LANG ,  Marvin KRAMP ,  Claus HECHLER

IPC: B01D3/32 ,  B01D3/36 ,  B01D3/00 ,  C07C67/08 ,  C07C67/54

CPC classification number: B01D3/322 ,  B01D3/009 ,  B01D3/36 ,  C07C67/08 ,  C07C67/54

Abstract: The invention relates to an apparatus for carrying out mass transfer processes, comprising a column having at least two inlet pipes for introducing a gaseous phase, where separation-active internals are accommodated in the column and a column section extends from the at least two inlet pipes to the separation-active internals, in which section a coverage of a cross-sectional area of the column is less than 25%, based on the total cross-sectional area, and where the at least two inlet pipes have a height offset which corresponds to not more than three times an inlet pipe diameter and the at least two inlet pipes are at an angle (α) of from 60° to 150° to one another and have asymmetry with respect to one another. The invention further relates to a use of the apparatus and also a method for designing the apparatus.

公开(公告)号：US20210079150A1

公开(公告)日：2021-03-18

申请号：US16963681

申请日：2019-01-23

Applicant: BASF SE

Inventor： Miran YU ,  Ortmund LANG ,  Dieter RODEWALD ,  Stephan SCHLITTER ,  Guenter SCHERR ,  Felix WESTERHAUS

IPC: C08G2/28 ,  C08G8/12 ,  B01D1/06

Abstract: Process for the removal of volatile compounds from a tackifier comprising a resin with repeating units of formula I wherein R1 is a linear or branched alkylen group with 1 to 10 carbon atoms and R2 is a linear or branched, saturated or unsaturated N aliphatic hydrocarbon group with up to 20 carbon atoms, and optionally a plasticizer, wherein the tackifier is passed through at least one evaporator as film and the volatile compounds are removed from the film.

公开(公告)号：US20190330137A1

公开(公告)日：2019-10-31

申请号：US16471993

申请日：2017-12-11

Applicant: BASF SE

Inventor： Ortmund LANG ,  Bernd METZEN ,  Claus HECHLER

IPC: C07C67/54 ,  B01D3/22 ,  B01D3/14

Abstract: Process for isolating pure tert-butyl (meth)acrylate from crude tert-butyl (meth)acrylate by distillation, wherein the process is carried out in a dividing wall column (1) which has separation-active internals and vaporizer (7) and in which a dividing wall (8) is arranged in the longitudinal direction of the column to form an upper joint column region (9), a lower joint column region (14), an inflow section (10, 12) having a side feed point (2) and an offtake section (11, 13) having a side offtake point (3), the column has a number of theoretical plates in the range from 20 to 80, where the number of theoretical plates of the dividing wall column (1) relates to the sum of the theoretical plates in the joint upper column region (9), the joint lower column region (14) and the inflow section (10, 12), the side feed point (2) for the crude tert-butyl (meth)acrylate is arranged at a theoretical plate in the region commencing at least two theoretical plates above the bottommost theoretical plate and ending at least two theoretical plates below the uppermost theoretical plate, the side offtake point (3) for the pure tert-butyl (meth)acrylate is arranged at a theoretical plate in the region commencing at least two theoretical plates above the bottommost theoretical plate and ending at least two theoretical plates below the uppermost theoretical plate and the dividing wall (8) is arranged in the column in the region commencing at least one theoretical plate above the bottommost theoretical plate and ending at least one theoretical plate below the uppermost theoretical plate, where the ratio of amount of liquid at the upper end of the dividing wall (8) going to the enrichment section (10) and the stripping section (11) of the column is set in the range from 1:0.2 to 1:5.