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. 23, 2010
Filed:
Apr. 28, 2006
Dennis J. Miller, Okemos, MI (US);
Navinchandra Asthana, East Lansing, MI (US);
Aspi Kolah, East Lansing, MI (US);
Dung T. VU, Grand Rapids, MI (US);
Carl T. Lira, East Lansing, MI (US);
Dennis J. Miller, Okemos, MI (US);
Navinchandra Asthana, East Lansing, MI (US);
Aspi Kolah, East Lansing, MI (US);
Dung T. Vu, Grand Rapids, MI (US);
Carl T. Lira, East Lansing, MI (US);
Board of Trustees of Michigan State University, East Lansing, MI (US);
Abstract
A process for producing organic acid di- or tri-esters, particularly citric acid tri-esters, with the available acid groups esterified using countercurrent reactive distillation using acid catalysts in a structured packing is described. In the reactive distillation an organic acid di- or tri-ester is formed by chemical reaction and purified to its final state within the single column. Organic acid di- or tri-esters are produced at relatively low cost, with less waste production in by-products of the reaction, and in a less complicated manner than prior processes. Organic acid di- and tri-esters have uses as solvents, as plasticizers and in conversion products.