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:
Aug. 21, 2012
Filed:
Sep. 12, 2007
Helmut Schmidtke, Bensheim, DE;
Oliver Buβmann, Ludwigshafen, DE;
Ralph Versch, Eppelsheim, DE;
Udo Rheude, Otterstadt, DE;
Uwe Leyk, Worms, DE;
Manfred Julius, Limburgerhof, DE;
Martin Rudloff, Gönnheim, DE;
Erhard Henkes, Einhausen, DE;
Helmut Schmidtke, Bensheim, DE;
Oliver Buβmann, Ludwigshafen, DE;
Ralph Versch, Eppelsheim, DE;
Udo Rheude, Otterstadt, DE;
Uwe Leyk, Worms, DE;
Manfred Julius, Limburgerhof, DE;
Martin Rudloff, Gönnheim, DE;
Erhard Henkes, Einhausen, DE;
BASF SE, , DE;
Abstract
Processes for the continuous fractional distillation of a mixture comprising morpholine (MO), monoaminodiglycol (ADG), ammonia and water from a reaction of diethylene glycol (DEG) with ammonia, the process comprising: (i) separating off ammonia from the mixture at a top of a first distillation column K; (ii) feeding a bottom fraction from the first distillation column to a second distillation column K, wherein water and an organic product are separated off at a top of the second distillation column at a top temperature of 45 to 198° C. and a pressure in the range from 0.1 to 15 bar; (iii) feeding a bottom fraction from the second distillation column to a third distillation column K, wherein morpholine and an organic product having a boiling point of <140° C. (1.013 bar) are separated off at a point selected from a top and a side offtake of the third distillation column, and monoaminodiglycol and an organic product having a boiling point of >190° C. (1.013 bar) are separated off at a bottom of the third distillation column, and (iv) feeding the morpholine-comprising stream from the third distillation column to a fourth column K, wherein morpholine is separated off at a side offtake of the fourth column, an organic product having a boiling point of ≦128° C. (1.013 bar) is separated off at a top of the fourth distillation column and an organic product having a boiling point of ≧128° C. (1.013 bar) is separated off at a bottom of the fourth distillation column.