US3785122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 4,5a zeolite and method for separating mixtures using same
Assignee: Individual
•
Filing: 1972-01-27
•
Granted: 1974-01-15
•
Expires: 1992-01-27
Abstract
Abstract This invention is concerned to a process of preparing a novel kind of A-type zeolite having specific molecular sieving actions and a method of using said zeolite to separate a mixture of substances into substances having a different adsorption effective cross-sectional area.
Inventors
- 👤 T Takaishi
- 👤 Y Yatsurugi
- 👤 T Kuratomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:31
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; C01; C01B; C01B25/00; C01B25/06; C01B33/00; C01B33/04; C01B33/046; C01B6/00; C01B6/06; C01B6/10; C01B6/34; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
44 words
A method as claimed in claim 1 wherein 4.5 A zeolite with 75 percent zinc ions and 25 percent potassium ions exchanged is used to separate diborane from a mixture thereof with one or more of monosilane, germane, arsine, phosphine, and straight chain hydrocarbon.
Claim 2
Dependent Claim
44 words
A method as claimed in claim 1 wherein 4.5 ziolite with 68 percent zinc ions and 32 percent potassium ions exchanged is used to separate diborane and germane from a mixture thereof with one or more of monosilane, arsine, phosphine, and straight chain hydrocarbon.
Claim 3
Dependent Claim
23 words
A method as claimed in claim 3 wherein 4.5 A zeolite as claimed in claim 8 is used to separate cis-2-butene from n-butane.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |