Claims
- 1. The process of treating a charge dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120 selected from the group consisting of (i) an ammonium form of dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120, (ii) a hydrogen form of dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120, and (iii) a metal exchanged dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120 and a Lattice Constant of about 24.30 A-24.50 A which charge is characterized by the presence of Secondary Pores of diameter of about 100 A-600 A which comprises
- contacting said charge zeolite with acidic medium at 75.degree. F.-140.degree. F. for 0.5-6 hours thereby converting said charge zeolite into an acidified zeolite characterized by (i) an increased Secondary Pore Volume of about 0.14-0.20 cc/g, (ii) a decreased Lattice Constant of about 24.23 A-24.33 A, (iii) a Secondary Pore Mode of about 115 A-145 A, (iv) a Secondary Pore Diameter of about 100 A-600 A, and (v) a Surface Silicon to Aluminum Atom Ratio of about 24-45; and
- recovering said acidified zeolite characterized by (i) an increased Secondary Pore Volume of about 0.14-0.20 cc/g, (ii) a decreased Lattice Constant of about 24.23 A-24.33 A, (iii) a Secondary Pore Mode of about 115 A-145 A, and (v) a Surface Silicon to Aluminum Atom Ratio of about 24-45.
- 2. The process of treating a charge dealuminated Y-zeolite as claimed in claim 1 wherein said charge zeolite is an ammonium form dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120.
- 3. The process of treating a charge dealuminated Y-zeolite as claimed in claim 1 wherein said charge zeolite is a hydrogen form dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120.
- 4. The process of treating a charge dealuminated Y-zeolite as claimed in claim 1 wherein said charge zeolite is a metal exchanged dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120.
- 5. The process of treating a charge dealuminated Y-zeolite as claimed in claim 1 wherein said contacting with acidic medium is carried out at ambient temperature.
- 6. The process of treating a charge dealuminated Y-zeolite as claimed in claim 1 wherein said acidic medium is an aqueous solution of an organic acid.
- 7. The process of treating a charge dealuminated Y-zeolite as claimed in claim 1 wherein said acidic medium is an aqueous solution of an inorganic acid.
- 8. The process of treating a charge dealuminated Y-zeolite as claimed in claim 1 wherein said acidic medium is an aqueous solution of nitric acid, carried out for about 2-6 hours.
- 9. The process of treating a charge dealuminated Y-zeolite in hydrogen form having a silica to alumina mole ratio of about 10-120 and a lattice constant of about 24.30 A-24.50 A which comprises
- contacting said charge zeolite with an acidic medium at 75.degree. F.-140.degree. F. for 0.5-6 hours thereby converting said charge zeolite into an acidified zeolite characterized by (i) an increased Secondary Pore Volume of about 0.14-0.20 cc/g, (ii) a decreased Lattice Constant of about 24.23 A-24.33 A, (iii) a Secondary Pore Mode of about 100 A-325 A, (iv) a Secondary Pore Diameter of about 100 A-600 A, and (v) a Surface Silicon to Aluminum Atom Ratio of about 24-45; and
- recovering said acidified zeolite characterized by (i) an increased Secondary Pore Volume of about 0.14-0.20 cc/g, (ii) a decreased Lattice Constant of about 24.23 A-24.33 A, (iii) a Secondary Pore Mode of about 115 A-145 A, (iv) a Secondary Pore Diameter of about 100 A-600 A, and a Surface Silicon to Aluminum Atom Ratio of about 24-45.
- 10. A novel acidified dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120 selected from the group consisting of (i) an ammonium form of dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120, (ii) a hydrogen form of having a silica to alumina mole ratio of about 10-120, and (iii) a metal exchanged dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120 characterized by
- (i) an increased Secondary Pore Volume of about 0.14-0.20 cc/g, (ii) a decreased Lattice Constant of about 24.23 A-24.33 A, (iii) a Secondary Pore Mode of about 115 A-145 A, (iv) a Secondary Pore Diameter of about 100 A-600 A, (v) a surface Silicon to Aluminum Atom Ratio of about 24-45, and (vi) an Acid Site Density of about 1-5 cc NH.sub.3 /g cat.
- 11. A novel catalyst comprising
- an acidified dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120 selected from the group consisting of (i) an ammonium form of dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120, (ii) a hydrogen form of dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120, and (iii) a metal exchanged dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120 characterized by
- (i) an increased Secondary Pore Volume of about 0.14-0.20 cc/g, (ii) a decreased Lattice Constant of about 24.23 A--24 33 A, (iii) a Secondary Pore Mode of about 115 A-145 A, (iv) a Secondary Pore Diameter of about 100 A-600 A, (v) a surface Silicon to Aluminum Atom Ratio of about 20-50, and (vi) an Acid Site Density of about 1-5 cc NH.sub.3 /g cat;
- (i) a binder; and
- (ii) a catalytic metal.
- 12. A novel catalyst comprising
- (i) an acidified zeolite prepared from a charge zeolite selected from the group consisting of (i) an ammonium form of dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120, (ii) a hydrogen form of dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120, and (iii) a metal exchanged dealuminated Y-zeolite having a silica to alumina mole ratio of about 10-120 and a Lattice Constant of about 24.30 A-24.50 A which acidified zeolite charge is characterized by the presence of Secondary Pores of diameter of about 100 A-600 A which has been prepared by the process which comprises contacting said charge zeolite with acidic medium at 75.degree. F.-140.degree. F. for 0.5-6 hours thereby converting said charge zeolite into an acidified zeolite characterized by (i) an increased Secondary Pore Volume of about 0.114-0.20 cc/g, (ii) a decreased Lattice Constant of about 24.23 A-24.33 A, (iii) a Secondary Pore Mode of about 115 A-145 A, (iv) a Secondary Pore Diameter of about 100 A-600 A, and (v) a Surface Silicon to Aluminum Atom Ratio of about 24-45; and
- recovering said acidified zeolite characterized by (i) an increased Secondary Pore Volume of about 0.14-0.20 cc/g, (ii) a decreased Lattice Constant of about 24.23 A-24.33 A, (iii) a Secondary Pore Mode of about 115 A-145 A, and (v) a Surface Silicon to Aluminum Atom Ratio of about 24-45
- ii; a binder;
- (iii) at least one Group VIB metal; and
- (iv) at least one non-noble Group VIII metal.
Parent Case Info
This is a division of application Ser. No. 07/533,222 filed June 4, 1990 now U.S. Pat. No. 5,112,473.
US Referenced Citations (3)
Non-Patent Literature Citations (1)
Entry |
Zeolite Chemistry and Catalysis, by Ward, ACS Monograph 171, American Chemical Soc., Washington, D.C. 1976, pp. 249-251. |
Divisions (1)
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Number |
Date |
Country |
Parent |
533222 |
Jun 1990 |
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