The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2006
Filed:
Jan. 24, 2001
Karl-heinz Wostbrock, Mörstadt, DE;
Gerd Kaibel, Lampertheim, DE;
Christian Tragut, Wachenheim, DE;
Gabriele Anken, Lambsheim, DE;
Karl-Heinz Wostbrock, Mörstadt, DE;
Gerd Kaibel, Lampertheim, DE;
Christian Tragut, Wachenheim, DE;
Gabriele Anken, Lambsheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
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.