US3979335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of synthetic zeolites
Assignee: Individual
•
Filing: 1974-12-27
•
Granted: 1976-09-07
•
Expires: 1994-12-27
Abstract
Abstract A process for the preparation of synthetic zeolites comprising mixing zeolite powder of a particle size not exceeding 5 mcm with a natural binder of a particle size of 250-500 A. The resulting mixture is wetted with water and pelletized, the pellets thus obtained being calcined at 600°-700°C.
Inventors
- 👤 Georgy Anatolievich Golovko
- 👤 Boris Alexandrovich Lipkind
- 👤 Albina Timofeevna Slepneva
- 👤 Alexandr Semenovich Leontiev
- 👤 Vladimir Mikhailovich Mazin
- 👤 Elena Nikolaevna Berezovskaya
- 👤 Valentin Alexandrovich Burylov
- 👤 Alexandr Mikhailovich Zubkov
- 👤 Olga Alexeevna Konakova
- 👤 Alexandr Ivanovich Judaev
- 👤 Valentin Nikolaevich Pavlychev
- 👤 Jury Yakovlevich Ignatov
- 👤 Evgeny Alexandrovich Kharitonov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:41
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
A process for the preparation of synthetic zeolite pellets of high mechanical strength and dynamic activity comprising mixing zeolite powder of a particle size not exceeding 5 mcm with a natural clay binder of a particle size of 250-500 A; wetting the resulting mixture with water and pelletizing the same; and calcining the resulting pellets at 600°-700°C.
Claim 2
Dependent Claim
57 words
A process for the preparation of synthetic zeolite pellets of high mechanical strength and dynamic activity comprising mixing zeolite powder of a particle size not exceeding 5 mcm with a natural clay binder of a particle size of 250-500 A; wetting the resulting mixture with water and pelletizing the same; and calcining the resulting pellets at 600°-700°C.
Claim 3
Dependent Claim
14 words
A process according to claim 1, wherein the natural clay binder comprises plastic kaolinites.
Claim 4
Dependent Claim
15 words
A process according to claim 1, wherein the natural clay binder comprises plastic hydromica varieties.
Claim 5
Dependent Claim
24 words
A process according to claim 1, wherein the pellets are dried at 150°-200°C to a residual moisture content of 20-25% prior to the calcination.
Claim 6
Dependent Claim
51 words
A process according to claim 1, wherein the pellets after the calcination are leached with 1-10% aqueous solution of a sodium compound selected from the group consisting of caustic soda, sodium carbonate, and sodium silicate at 75°-95°C, with subsequent washing of the pellets with water to pH=6-8 and calcination at 350°-450°C.
Claim 7
Dependent Claim
40 words
A process according to claim 5, wherein the pellets are treated after the leaching and before the washing with water with 1-1.5N aqueous solution of a salt selected from the group consisting of calcium chloride, potassium chloride and silver nitrate.
Claim 8
Dependent Claim
29 words
A process according to claim 5, wherein the pellets are dried at 150°-200°C to a residual moisture content of 20-25% after the washing with water and before the calcination.
Claim 9
Dependent Claim
48 words
A process according to claim 1, wherein the pellets are treated after the calcination with 1-1.5N aqueous solution of a salt selected from the group consisting of calcium chloride potassium chloride and silver nitrate, with subsequent washing of the pellets with water to pH=6-8 and calcination at 350°-450°C.
Claim 10
Dependent Claim
18 words
A process according to claim 1 wherein the particle size of said zeolite powder is between 1-5 mcm.
Claim 11
Dependent Claim
20 words
A process according to claim 1 wherein the calcining of the pellets at 600°-700°C is carried out for 12-24 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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |