Aromatization catalyst and methods of making and using same
A process of making an aromatization catalyst comprising: (a) mixing a zeolite, a binder, and water to form a mixture; (b) extruding the mixture to form a green extrudate; (c) drying the green extrudate to form a dried green extrudate; (d) calcining the dried green extrudate to form a support, wherein calcining the dried green extrudate is the only calcination step in the process; (e) washing the support to form a washed support; (f) drying the washed support to form a dried washed support; (g) impregnating the dried washed support with a Group 8-10 transition metal compound and at least one halide-containing compound to form a metalized-halided material; and (h) vacuum drying the metalized-halided material to form a dried metalized-halided material which is the aromatization catalyst.
1. A process comprising:
(a) mixing an L-zeolite, a binder, and water to form a mixture;
(b) extruding the mixture to form a green extrudate;
(c) drying the green extrudate to form a dried green extrudate;
(d) calcining the dried green extrudate to form a support, wherein calcining the dried green extrudate is the only calcination step in the process;
(e) washing the support to form a washed support;
(f) drying the washed support to form a dried washed support;
(g) impregnating the dried washed support with a Group 8-10 transition metal compound and at least one halide-containing compound to form a metalized-halided material; and
(h) vacuum drying the metalized-halided material to form a dried metalized-halided material which is an aromatization catalyst.
2. The process of claim 1 wherein the Group 8-10 transition metal comprises platinum.
3. The process of claim 1 wherein the Group 8-10 transition metal compound comprises ammonium tetrachloroplatinate, diammineplatinum (II) nitrite, bis-(ethylenediamine)platinum (II) chloride, dichlorodiammine platinum, tetraammineplatinum (II) hydroxide, tetraammineplatinum chloride, tetraammineplatinum (II) nitrate, or a combination thereof.
4. The process of claim 1 wherein the at least one halide comprises a fluoride-containing compound, a chloride-containing compound, or a combination thereof.
5. The process of claim 1 wherein the aromatization catalyst comprises the Group 8-10 transition metal in an amount of from about 0.1 wt. % to about 5 wt. % based on the total weight of the aromatization catalyst.
6. The process of claim 1 wherein the aromatization catalyst has a micropore volume of from about 0.04 cc/g to about 0.10 cc/g.
7. The process of claim 1 wherein the aromatization catalyst has a crush strength of from about 4.5 lbs. (2.0 Kg) to about 15 lbs. (6.8 Kg).
8. A process comprising:
(a) mixing an L-zeolite, a binder, and water to form a mixture;
(b) extruding the mixture to form a green extrudate;
(c) drying the green extrudate to form a dried green extrudate;
(d) calcining the dried green extrudate to form a support, wherein calcining the dried green extrudate is the first of only two calcination steps in the process;
(e) washing the support to form a washed support;
(f) drying the washed support to form a dried washed support;
(g) calcining the dried washed support to form a second calcined support, wherein calcining the dried washed support is the second of only two calcination steps in the process;
(h) impregnating the second calcined support with a Group 8-10 transition metal compound and at least one halide-containing compound to form a metalized-halided material; and
(i) vacuum drying the metalized-halided material to form a dried metalized-halided material which is an aromatization catalyst.
9. The process of claim 8 wherein the Group 8-10 transition metal comprises platinum.
10. The process of claim 8 wherein the at least one halide comprises a fluoride-containing compound, a chloride-containing compound, or a combination thereof.