Metal cations as inorganic structure directing agents during the synthesis of phillipsite and tobermorite
AssigneeThe Regents of the University of California
InventorsDante Simonetti, Juan Carlos Vega-Vila, Gaurav Sant, Advait Holkar, Samanvaya Srivastava, Ross Arnold
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Abstract
The present disclosure relates to zeolites comprising Al, Si, O, H, Na, K and Ca, wherein the zeolite advantageously comprises phillipsite and tobermorite phases. The present disclosure further provides methods of preparing the zeolites from a synthesis gel.
Claims22
A zeolite having a micropore volume from about 0.001 to about 0.1 cm3/g, comprising Al, Si, O, H, Na, K and Ca;
- wherein the zeolite comprises:
- a total cation content:aluminum ratio (Cat:Al) from about 0.4 to about 40, defined by formula I:
- ((K+Na+Ca)/(Al)) (I);
- a sodium:aluminum ratio (Na:Al) of from about 0.1 to about 16;
- a potassium:aluminum ratio (K/Al) of from about 0.01 to about 15;
- and
- a calcium:aluminum ratio (Ca/Al) of from about 0.001 to about 10.
3-8. (canceled)
10-17. (canceled)
19-23. (canceled)
25-29. (canceled)
31-36. (canceled)
A method of preparing a zeolite comprising:
- preparing a synthesis gel, the synthesis gel comprising aNa20:bK20:cCaO:dA1203:eSi02:fH20, wherein a is from about 0.01 to about 5, b is from about 0.01 to about 1, c is from about 0.01 to about 2, d is from about 0.01 to about 0.5, e is from about 0.1 to about 2, f is from 10 to about 50;
- and
- further wherein the fraction of calcium in the total cationic content of the synthesis gel is represented by a charge ratio (RC), wherein RC is described by formula II:
- (2x)/(y +z +(2x)) =RC (II);
- wherein x represents the number of calcium cations present in the synthesis gel;
- y represents the number of potassium cations present in the synthesis gel;
- z represents the number of sodium cations present in the synthesis gel;
- and
- RC is between 0 and 1;
- aging the synthesis gel;
- heating the synthesis gel to produce a product mixture;
- and
- Application No.18/2000875 5 Docket No.:
- UCH-33401 collecting the zeolite from the product mixture.
The method of claim 41any one of claims 41 43, wherein aging the synthesis gel occurs at about 20-30 ° C. (Currently Amended) The method of claim 41aine-of--elaims-4-1-4-2, wherein heating the synthesis gel comprises heating the synthesis gel to a reaction temperature of from about 350 K to about 410 K. Claims 46-49 (Cancelled) (Currently Amended) The method of claim 41any one of claims 41 to 49, wherein collecting the zeolite from the product mixture comprises washing the zeolite with water, isolating the zeolite by centrifugation, and drying the zeolite.
The method of claim 51, wherein RC is from about 0.1 to about 0.9. Claims 53-91 (Cancelled) Application No.18/2000875 6 Docket No.:
- UCH-33401
Dependencies are inferred from the claim text.