US4093699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic zeolite
Assignee: Zeochem Corp
•
Filing: 1976-11-10
•
Granted: 1978-06-06
•
Expires: 1996-11-10
Abstract
Abstract Method for making a zeolite having the structure of offretite, consisting of reacting in a closed container under autogenous pressure in the absence of tetramethylammonium ions, a composition having specific mole rations of K 2 O,Na 2 O,SiO 2 , Al 2 O 3 , and H 2 O.
Inventors
- 👤 Leonard B. Sand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:11
CPC Classifications
C; C01; C01B; C01B39/00; C01B39/02; C01B39/30; C01B39/28; C01B39/46
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
A method for making a zeolite having the structure of offretite, as determined by x-ray defraction, and capable of absorbing 0.512 mmoles of benzene per gram of zeolite at P/Ps of 0.669, comprising reacting in a closed container filled with a composition of 1/4 of its capacity under autogenous pressure and in the absence of tetramethylammonium ions, the composition having oxide mole ratios of: (K.sub.2 O) 0.65(Na.sub.2 O).sub.2 (SiO.sub.2).sub.12 (Al.sub.2
O.sub.3) (H.sub.2 O) 36.11 wherein the source of silica is diatomite the composition being maintained at a temperature of between approximately 140° C. and 145° C inclusive, for a time sufficient to form the zeolite.
Claim 2
Independent Claim
105 words
A method for making a zeolite having the structure of offretite, as determined by x-ray defraction, and capable of absorbing 0.512 mmoles of benzene per gram of zeolite at P/Ps of 0.669, comprising reacting in a closed container filled with a composition of 1/4 of its capacity under autogenous pressure and in the absence of tetramethylammonium ions, the composition having oxide mole ratios of: (K.sub.2 O) 0.65(Na.sub.2 O).sub.2 (SiO.sub.2).sub.12 (Al.sub.2
O.sub.3) (H.sub.2 O) 36.11 wherein the source of silica is diatomite the composition being maintained at a temperature of between approximately 140° C. and 145° C inclusive, for a time sufficient to form the zeolite.
Claim 3
Dependent Claim
13 words
The method as recited in claim 1, wherein the time is 22 hours.
Claim 4
Independent Claim
112 words
A method for making a zeolite having the structure of offretite, as determined by x-ray defraction, and capable of absorbing 0.512 mmoles of benzene per gram of zeolite at P/Ps of 0.668 comprising reacting in a closed container filled to 1/4 its capacity under autogenous pressure and in the absence to tetramethylammonium ions, a composition having oxide mole ratios of: Na.sub.2 O/Na.sub.2 O+K.sub.2 O = 0.74
Na.sub.2 O+K.sub.2 O/SiO.sub.2 = 0.4
SiO.sub.2 /Al.sub.2 O.sub.3 = 28
H.sub.2 O/Na.sub.2 O+K.sub.2 O = 42 wherein the source of silica is an aqueous colloidal silica sol, the composition being maintained at a temperature of approximately 120° C for a time sufficient to form the zeolite.
Claim 5
Independent Claim
112 words
A method for making a zeolite having the structure of offretite, as determined by x-ray defraction, and capable of absorbing 0.512 mmoles of benzene per gram of zeolite at P/Ps of 0.668 comprising reacting in a closed container filled to 1/4 its capacity under autogenous pressure and in the absence to tetramethylammonium ions, a composition having oxide mole ratios of: Na.sub.2 O/Na.sub.2 O+K.sub.2 O = 0.74
Na.sub.2 O+K.sub.2 O/SiO.sub.2 = 0.4
SiO.sub.2 /Al.sub.2 O.sub.3 = 28
H.sub.2 O/Na.sub.2 O+K.sub.2 O = 42 wherein the source of silica is an aqueous colloidal silica sol, the composition being maintained at a temperature of approximately 120° C for a time sufficient to form the zeolite.
Claim 6
Dependent Claim
13 words
A method as recited in claim 3, wherein the time is 69 hours.
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) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |