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:
Mar. 24, 2015
Filed:
Mar. 29, 2012
Jan Van Krieken, Gorinchem, NL;
Siebe Cornelis DE Vos, Arnhem, NL;
Johannes Adrianus Kamp, Vlijmen, NL;
Jan Van Krieken, Gorinchem, NL;
Siebe Cornelis De Vos, Arnhem, NL;
Johannes Adrianus Kamp, Vlijmen, NL;
Purac Biochem BV, Gorinchem, NL;
Abstract
The invention relates to a method for the removal of the cyclic diester of a 2-hydroxy alkanoic acid from a vapor containing said diester, wherein the vapor is contacted with an aqueous solution so that the diester dissolves in said solution. According to the invention, the method is characterized in that the solution is an alkaline solution, preferably having a pH above 10. The problem of the formation of slurries of the diester in the aqueous solutions can be prevented by the present invention. The method can be applied with great advantage in the production or conversion of lactide.