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. 02, 2016
Filed:
Jan. 26, 2012
Thomas Chad Walker, Independence, KY (US);
Stephen W. Turner, Hamilton, OH (US);
Jay William Landwehr, Villa Hills, KY (US);
Douglas Da Silva Rosa, Cincinnati, OH (US);
Mark Elliot Durchholz, West Chester, OH (US);
Thomas Chad Walker, Independence, KY (US);
Stephen W. Turner, Hamilton, OH (US);
Jay William Landwehr, Villa Hills, KY (US);
Douglas da Silva Rosa, Cincinnati, OH (US);
Mark Elliot Durchholz, West Chester, OH (US);
Emery Oleochemicals LLC, Cincinnati, OH (US);
Abstract
A process for purifying a dicarboxylic acid that is derived from the mixed oxidation products from an ozonization of a mixture containing an ethylenically unsaturated compound having between 6 to 24 carbons, the process includes distilling the mixed oxidation products to provide a first distillate, and a second distillate, where the second distillate includes the dicarboxylic acid and impurity acids, partitioning the second distillate between water and a organic solvent, separating the organic solvent layer from the water layer, lowering the temperature of the water layer to crystallize at least a portion of the dicarboxylic acid, separating the crystallized dicarboxylic acid solid, melting the crystallized dicarboxylic acid, and distilling the liquid dicarboxylic acid to provide a purified dicarboxylic acid.