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:
Jan. 26, 2021
Filed:
Sep. 25, 2017
Applicant:
Katholieke Universiteit Leuven, Leuven, BE;
Inventors:
Assignee:
KATHOLIEKE UNIVERSITEIT LEUVEN, Leuven, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 319/12 (2006.01);
U.S. Cl.
CPC ...
C07D 319/12 (2013.01);
Abstract
A process for preparing cyclic esters by means of a transesterification reaction in the gas phase, comprises the steps of: (i) vaporizing a liquid solution of alpha-hydroxy esters, (ii) passing the ester vapors through a reaction zone containing a solid catalyst and (iii) recovering the cyclic esters from the gaseous product stream; and wherein the solid catalyst comprises at least one metal of titanium (Ti) and Zirconium (Zr), and a SiO2 support, and wherein said metal is chemically bound to the SiO2 support through M-O—Si chemical bonds.