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:
Jun. 16, 1998
Filed:
Jul. 17, 1996
Applicant:
Inventors:
Dieter Arnold, Konigstein, DE;
Bernhard Hierholzer, Frankfurt, DE;
Karl-Friedrich Muck, Wiesbaden, DE;
Monika Reiss, Schwalbach, DE;
Peter Richter, Waldems-Bermbach, DE;
Hans-Dietmar Schnabel, Eppstein, DE;
Hubert Wloch, Niedernhausen, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07D / ;
U.S. Cl.
CPC ...
203 74 ; 203 77 ; 203 80 ; 549368 ;
Abstract
A process for removing trioxane from a liquid mixture containing trioxane, water and formaldehyde, which includes distilling the liquid mixture in a first distillation stage at a low pressure, distilling the resulting distillate in a second distillation stage at a higher pressure and taking off trioxane as bottom product.