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. 20, 2024
Filed:
Oct. 30, 2019
Applicant:
Basf SE, Ludwigshafen am Rhein, DE;
Inventors:
Jacek Malisz, Ludwigshafen am Rhein, DE;
Johannes Nagel, Ludwigshafen am Rhein, DE;
Michael Jacquier, Binzen, DE;
Assignee:
BASF SE, Ludwigshafen am Rhein, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 61/02 (2006.01); B01D 61/58 (2006.01); B01D 71/02 (2006.01); C07D 251/24 (2006.01); B01D 61/14 (2006.01); B01D 71/68 (2006.01);
U.S. Cl.
CPC ...
B01D 61/58 (2013.01); B01D 61/027 (2013.01); B01D 61/145 (2013.01); B01D 71/025 (2013.01); C07D 251/24 (2013.01); B01D 71/68 (2013.01); B01D 2311/08 (2013.01); B01D 2311/10 (2013.01); B01D 2311/14 (2013.01); B01D 2311/18 (2013.01); B01D 2311/2642 (2013.01); B01D 2311/2649 (2013.01);
Abstract
The present invention provides an improved process for isolating 2,4-bis-(2,4-dihydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine (DIOPAT) from an aqueous alkaline mixture M having a pH of 10 or more and comprising the 2,4-bis-(2,4-dihydroxyphenyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-dihydroxybenzophenone, and aluminum salts, wherein the process comprises a nanofiltration step, a precipitation step, and a further filtration step.