公开(公告)号：DE50204071D1

公开(公告)日：2005-10-06

申请号：DE50204071

申请日：2002-11-07

Applicant: BASF AG

Inventor： STROEFER DR ,  WOSTBROCK DR ,  WEBER DR

IPC: B01D3/00 ,  A23K20/105 ,  C07B61/00 ,  C07C51/10 ,  C07C51/42 ,  C07C51/44 ,  C07C53/04 ,  C07C53/06 ,  A23K1/16

公开(公告)号：DE50101248D1

公开(公告)日：2004-02-05

申请号：DE50101248

申请日：2001-02-01

Applicant: BASF AG

Inventor： WOSTBROCK DR ,  KAIBEL DR ,  TRAGUT CHRISTIAN ,  ANKEN GABRIELE

IPC: B01D3/14 ,  C01C1/02

Abstract: Crude ammonia is separated into a low boiler fraction, a high boiler fraction and an intermediate-boiling pure fraction by continuous fractional distillation in a distillation apparatus configured either as a dividing wall column or as a system of thermally coupled distillation columns. In the process of the present invention, the low boiler fraction is taken off at the top of the distillation apparatus. The intermediate-boiling pure fraction is obtained at a side offtake which is preferably provided with droplet precipitators. In addition, the gas loading of the distillation column is restricted so that the operating pressure is in the range from 2 to 30 bar and the F factor does not exceed 2.0 Pa 0.5 .