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Patent US3674425A successfully refreshed from Google Patents.
US3674425A
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US
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Process for preparing a synthetic crystalline zeolite
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1969-04-02
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Granted: 1972-07-04
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Expires: 1989-04-02
Abstract
Abstract A CRYSTALLINE ZEOLITE HAVING THE FORMULA 1.0$0.1(XNA2O: (1-X)RB2O):A12O3:6.5$1.0SIO2:YH2O WHEREIN X HAS A VALUE OF ABOUT 3.25 TO 0.75 AND Y HAS A VALUE OF FROM 0 TO ABOUT 10, AND AN X-RAY DIFFRACTION PATTERN SIMILAR TO THAT OF THE MINERAL ERIONITE, IS PREPARED BY DIGESTING A REACTION MIXTURE CONTAINING SIO2, AL2O3, NA2O, RB2O, AND H2O FROM SUITABLE SOURCE MATERIALS IN SPECIFIED PROPORTIONS AT A TEMPERATURE OF FROM ABOUT 80* C. TO ABOUT 150* C. THE ZEOLITE PRODUCT IS USEFUL AS A SELECTIVE ADSORBENT, FOR EXAMPLE, IN THE SEPARATION OF N-HEXANE OR N-OCTANE FROM THEIR ISOMERS.
Inventors
- 👤 Harry Edwin Robson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:38
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
2 words
0$0.1(XNA2O: (1-X)RB2O):A12O3:6.5$1.0SIO2:YH2O
Claim 2
Dependent Claim
2 words
0$0.1(XNA2O: (1-X)RB2O):A12O3:6.5$1.0SIO2:YH2O
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |