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. 12, 2008
Filed:
Jan. 08, 2002
Martin Gall, Mutterstadt, DE;
Gerd Kaibel, Lampertheim, DE;
Thomas Krug, Worms, DE;
Harald Rust, Neustadt, DE;
Frank Stein, Bad Dürkheim, DE;
Martin Gall, Mutterstadt, DE;
Gerd Kaibel, Lampertheim, DE;
Thomas Krug, Worms, DE;
Harald Rust, Neustadt, DE;
Frank Stein, Bad Dürkheim, DE;
Basf Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for working up by distillation the crude products obtained in the process according to DE-A 196 07 954 and containing 1,6-hexanediol (HDO), 1,5-pentanediol (PDO) or caprolactone (CLO) in order to obtain the corresponding pure products, the working-up by distillation being carried out in each case in a dividing wall column (TK) in which a dividing wall (T) is arranged in the longitudinal direction of the column with formation of an upper common column region (), a lower common column region (), a feed section () having a rectification section () and stripping section (), and a take-off section () having a stripping section () and rectification section (), with feeding of the respective crude product HDO, PLO or CLO in the middle region of the feed section () and removal of the high boiler fraction (C) from the bottom of the column, of the low boiler fraction (A) via the top of the column and of the medium boiler fraction (B) from the middle region of the take-off section (), or in thermally coupled columns.