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:
Dec. 09, 2008
Filed:
Apr. 30, 2007
Timan Sirch, Schifferstadt, DE;
Michael Steiniger, Neustadt, DE;
Steffen Maas, Bubenheim, DE;
Stefan Rittinger, Mannheim, DE;
Stephan Schlitter, Limburgerhof, DE;
Maria Guixa, Mannheim, DE;
Todd C. Spengeman, Missouri City, TX (US);
Jeffrey T. Andress, Lake Jackson, TX (US);
Timan Sirch, Schifferstadt, DE;
Michael Steiniger, Neustadt, DE;
Steffen Maas, Bubenheim, DE;
Stefan Rittinger, Mannheim, DE;
Stephan Schlitter, Limburgerhof, DE;
Maria Guixa, Mannheim, DE;
Todd C. Spengeman, Missouri City, TX (US);
Jeffrey T. Andress, Lake Jackson, TX (US);
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
The invention relates to a process for preparing polymethylol compounds of the formula (I) where the radicals R are each, independently of one another, a further methylol group or an alkyl group having from 1 to 22 carbon atoms or an aryl or aralkyl group having from 6 to 22 carbon atoms, by condensation of aldehydes having from 2 to 24 carbon atoms with formaldehyde in an aldol reaction using tertiary amines as catalyst to form alkanals of the formula (II) where the radicals R each independently have one of the abovementioned meanings, and subsequent hydrogenation of the latter. The particular inventive feature of this process is that the aldol reaction is carried out using an aqueous formaldehyde solution having a formic acid content of <150 ppm and preferably <100 ppm. In this way of carrying out the process, the formation of by-products can advantageously be prevented in a targeted manner and the yield of the desired polymethylol compound can thereby be increased.