公开(公告)号：US10183234B2

公开(公告)日：2019-01-22

申请号：US15072463

申请日：2016-03-17

Applicant: BASF SE

Inventor： Tim Blaschke ,  Ulrich Cremer ,  Ulrich Hammon

IPC: B01D3/32 ,  B01D3/20 ,  B01D3/22 ,  B01D3/26 ,  B01F3/04 ,  C07C45/78 ,  C07C51/42 ,  C07C67/48 ,  B01J19/00 ,  B01L3/16

Abstract: The invention relates to a crossflow tray for a mass transfer column (27) in which a gas is conducted in countercurrent to a liquid, the crossflow tray (1) having passage orifices (3) for the gas and at least two downcomers (5), the downcomers (5) projecting beyond the top surface of the crossflow tray (1) and a collecting cup (13) being disposed beneath each downcomer (5). The downcomer (5) projects into the collecting cup (13), the minimum horizontal cross-sectional area of the collecting cup (13) is 1.2 to 4 times greater than the horizontal cross-sectional area of the downcomer (5) at the outlet, and the collecting cup (13) has a circumferential wall (15) having an overflow (19).The invention further relates to a mass transfer column comprising the crossflow trays and to a use of the mass transfer column.

公开(公告)号：US09809526B2

公开(公告)日：2017-11-07

申请号：US15311541

申请日：2015-05-13

Applicant: BASF SE

Inventor： Tim Blaschke ,  Ortmund Lang ,  Marta Zajaczkowski-Fischer ,  Marco Hartmann

IPC: C07C51/46 ,  C07C51/377 ,  C07C51/43

CPC classification number: C07C51/46 ,  C07C51/377 ,  C07C51/43 ,  C07C57/04

Abstract: The invention relates to a process for dehydrating aqueous 3-hydroxypropionic acid to acrylic acid, wherein an aqueous mixture of 3-hydroxypropionic acid and oligomeric 3-hydroxypropionic acid is converted to acrylic acid in the liquid phase in a first step and aqueous acrylic acid is distilled out of the liquid phase, and the aqueous acrylic acid is separated by distillation into an acrylic acid-rich phase and a water-rich phase in a second step.