公开(公告)号：EP2544784A2

公开(公告)日：2013-01-16

申请号：EP11703131.0

申请日：2011-01-28

申请人： Lurgi GmbH

发明人： CASTILLO-WELTER, Frank ,  KIRSTEN, Klaus ,  BAUER, Jochen ,  STEDEN, Christoph ,  WALTER, Dominic ,  KREICH, Markus ,  ZEYEN, Rudolph

IPC分类号： B01D3/32 ,  C07C51/44

CPC分类号： B01D3/00 ,  B01D3/322 ,  C07C51/44 ,  C07C51/50 ,  C07C57/04

摘要： In a process for distilling polymerization-prone compounds from liquid mixtures of matter which, apart from the readily polymerizable compound, also contain other components and also polymerization inhibitors, the evaporator is operated in forced circulation and at a pressure which makes possible superheating of the liquid with respect to its boiling point at the pressure within the distillation column. This is achieved by transporting the superheated liquid against a flow restrictor, e.g. an orifice plate. The liquid which is expanded and partially evaporated on passage through the flow restrictor is returned to the distillation column. In this manner the formation of an open vapour space in the evaporator circuit after heating downstream of the heat exchanger is avoided in that, in the design of the evaporator of the prior art, formation of polymer deposits frequently occurs.

公开(公告)号：EP2683454A1

公开(公告)日：2014-01-15

申请号：EP11804643.2

申请日：2011-12-09

申请人： Lurgi GmbH

发明人： BAUER, Jochen ,  CASTILLO-WELTER, Frank ,  KREICH, Markus, Dr. ,  KIRSTEN, Klaus ,  STEDEN, Christoph ,  WALTER, Dominic

IPC分类号： B01D3/32 ,  C07C51/00

CPC分类号： B01D3/32 ,  B01D3/322 ,  C07C51/44 ,  C07C57/04

摘要： The invention relates to a distillation column with an externally located circulating evaporator and a sedimentation zone in the column sump from which the evaporator is supplied, and also relates to the use of the distillation column according to the invention for distilling acrylic acid.

公开(公告)号：EP2590719A1

公开(公告)日：2013-05-15

申请号：EP11726382.2

申请日：2011-06-08

申请人： Lurgi GmbH

发明人： BAUER, Jochen ,  CASTILLO-WELTER, Frank ,  KIRSTEN, Klaus ,  KREICH, Markus ,  STEDEN, Christoph ,  WALTER, Dominic ,  ZEYEN, Rudolf

IPC分类号： B01D3/00 ,  B01D5/00 ,  B01D3/14

CPC分类号： B01D3/26 ,  B01D3/14 ,  B01D5/0015 ,  B01D5/006 ,  C07C51/44 ,  C07C67/54 ,  C07C69/54 ,  C07C57/04

摘要： The aim of the invention is the distillation of temperature-sensitive liquids, in particular acrylic acid and the esters thereof. This is achieved in that the liquid is heated in a column and at least partially vaporized. The vapor is conducted through a condenser that is provided within the column, said vapor being at least partially condensed in the condenser. The condensed liquid is at least partially drawn off from the column. The distillation is characterized in that the vapor that is not yet condensed is conducted through the condenser concurrently with the condensed liquid.