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. 03, 2010
Filed:
Feb. 25, 2008
Tilman Sirch, Schifferstadt, DE;
Michael Steiniger, Neustadt, DE;
Steffen Maas, Bubenheim, DE;
Stefan Rittinger, Mannheim, DE;
Stephan Schlitter, Shanghai, CN;
Tilman Sirch, Schifferstadt, DE;
Michael Steiniger, Neustadt, DE;
Steffen Maas, Bubenheim, DE;
Stefan Rittinger, Mannheim, DE;
Stephan Schlitter, Shanghai, CN;
BASF SE, , DE;
Abstract
The preparation of hydroxypivalaldehyde is effected by aldolizing isobutyraldehyde with formaldehyde and subsequently working up the resulting reaction effluent by distillation, wherein the reaction effluent is fed to a distillation column which is operated at a top pressure in the range from 0.5 to 1.5 bar and in which a two-stage condensation is provided in the top region, in which the vapors are first conducted into a partial condenser operated at a temperature in the range from 50 to 80° C., whose condensate is recycled at least partly into the distillation column, and in which the vapors uncondensed in the partial condenser are fed to a downstream condenser operated at a temperature in the range from −40 to +30° C., whose condensate is at least partly discharged.