Patent ID: 8883668
Filing Date: 2014-11-11
Classification: B01J,C01B,C07C,C10G,Y02P

Abstract:
1. A method of making a phosphorous modified zeolite, comprising: selecting a zeolite having a Si:Al atomic ratio of 30 or less, wherein the zeolite is selected from the group consisting of MFI, MEL, FER, MOR, and clinoptilolite, and wherein the selected zeolite is in the H steaming the zeolite at a temperature ranging from 400° C. to 870° C. for 0.01 h to 200 h; leaching the zeolite with an aqueous acid solution containing a source of P at conditions effective to remove a substantial amount of Al from the zeolite and to introduce more than 0.3 wt % of P, wherein the aqueous acid solution containing the source of P comprises a salt of a phosphate ([PO separating the zeolite from the aqueous acid solution; and calcining the zeolite.