US4668649A
Expired / Lapsed
US
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Modified zeolite
Assignee: JGC Catalysts and Chemicals Ltd
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Filing: 1985-02-05
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Granted: 1987-05-26
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Expires: 2005-02-05
Abstract
Abstract As modified zeolite is disclosed here wherein the volume occupied by pores having a diameter ranging from 50 Å to 600 Å measured by the nitrogen gas absorption method is 30% or more of the volume occupied by pores having a diameter ranging from 0 to 600 Å. The catalyst containing this modified zeolite is suitably used especially in hydroprocessing heavy hydrocarbon oil.
Inventors
- 👤 Shinichi Yoshida
- 👤 Hidehiro Higashi
- 👤 Takemithu Yano
- 👤 Jun Fuchikami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:18
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/084; B01J35/61; B01J35/617; B01J35/63; B01J35/633; B01J35/64; B01J35/647; B01J35/651; B01J35/66
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
A modified zeolite which has been prepared by heating an ammonium cation-exchanged Y-type zeolite containing 0.5 wt. % or less of sodium, calculated as Na 2 O, and from 0.05 to 1.0 wt. % of sulfate ion, calculated as S, at a temperature of from 450° to 750° C. for at least one hour, until there is obtained the modified zeolite in which: (a) the volume occupied by pores having diameters in the range of 50-600 Å is 30% or more of the volume occupied by pores having diameters in the range of 0-600 Å, (b) the average diameter of pores having diameters in the range of 50-600 Å is 110 Å or more, and (c) the volume occupied by pores having diameters in the range of 300-600 Å is 15% or less of the volume occupied by pores having diameters in the range of 0-600 Å, said modified zeolite having a lattice constant in the range of from 24.30 to 24.40 Å.
Claim 2
Dependent Claim
163 words
A modified zeolite which has been prepared by heating an ammonium cation-exchanged Y-type zeolite containing 0.5 wt. % or less of sodium, calculated as Na 2 O, and from 0.05 to 1.0 wt. % of sulfate ion, calculated as S, at a temperature of from 450° to 750° C. for at least one hour, until there is obtained the modified zeolite in which: (a) the volume occupied by pores having diameters in the range of 50-600 Å is 30% or more of the volume occupied by pores having diameters in the range of 0-600 Å, (b) the average diameter of pores having diameters in the range of 50-600 Å is 110 Å or more, and (c) the volume occupied by pores having diameters in the range of 300-600 Å is 15% or less of the volume occupied by pores having diameters in the range of 0-600 Å, said modified zeolite having a lattice constant in the range of from 24.30 to 24.40 Å.
Claim 3
Dependent Claim
36 words
A modified zeolite according to claim 1 wherein the volume occupied by pores whose diameter is 600 Å or less is at least 0.35 ml/g, and the surface area is at least 400 m 2 /g.
Claim 4
Dependent Claim
86 words
A modified zeolite according to claim 1 in which the volume occupied by pores having diameters in the range of 50-600 Å is 35-80% of the volume occupied by pores having diameters in the range of 0-600 Å, the average diameter of pores having diameters in the range of 50-600 Å is 110-250 Å, and the volume occupied by pores having diameters in the range of 300-600 Å is 5% or less of the volume occupied by pores having diameters in the range of 0-600 Å.
Claim 5
Dependent Claim
86 words
A modified zeolite according to claim 2 in which the volume occupied by pores having diameters in the range of 50-600 Å is 35-80% of the volume occupied by pores having diameters in the range of 0-600 Å, the average diameter of pores having diameters in the range of 50-600 Å is 110-250 Å, and the volume occupied by pores having diameters in the range of 300-600 Å is 5% or less of the volume occupied by pores having diameters in the range of 0-600 Å.
Claim 6
Dependent Claim
26 words
A modified zeolite according to claim 4 in which said ammonium cation-exchanged zeolite contains from 0.07 to 0.5 wt. % of sulfate ion, calculated as S.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |