ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,741,268, issued on Sept. 22, was assigned to TONGJI UNIVERSITY (Shanghai).
"Composite catalyst and use thereof in preparing propylene glycol" was invented by Zheng Shen (Shanghai), Yalei Zhang (Shanghai) and Minyan Gu (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application provides a composite catalyst and use thereof in preparing propylene glycol, where the composite catalyst includes: a main catalyst; and an assistant catalyst, forming on the main catalyst; the assistant catalyst is a magnesium hydroxide shell with a cage-like shape forming on the surface of the main catalyst, and the main catalyst is located inside the magne...