US3982912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparation of an improved K-A type zeolite and for separation by adsorption polar and non-polar molecules
Assignee: Individual
•
Filing: 1974-05-06
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Granted: 1976-09-28
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Expires: 1994-05-06
Abstract
Abstract A novel type of zeolite is obtained by replacing ion-exchangeable active cations in A-type zeolite with potassium ions and divalent cations at 33.3 to 83.3% and 16.7 to 66.7%, respectively to combine into the total of 100%. This zeolite is effective for separation of a mixture consisting of non-polar molecules and polar molecules having the adsorption effective cross-section less than 5 A. For instance, monosilane and phosphine, both of which are adsorbed by the conventional Ca--A type zeolite, can be separated by the novel K--A type zeolite which adsorbs phosphine.
Inventors
- 👤 Yoshifumi Yatsurugi
- 👤 Tatsuo Kuratomi
- 👤 Tetsuo Takaishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:22
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; C07C7/13; B; B01; B01D; B01D15/00; B01D53/00; B01D53/02; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; Y; Y10; Y10S; Y10S95/00; Y10S95/90; Y10S95/902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
45 words
A process for removal of phosphine from a mixture of monosilane and phosphine which comprises contacting said mixture with an improved K-A type zeolite in which approximately 33.3 to 83.3% and approximately 16.7 to 66.7% of potassium ion and zinc ion, respectively, are ion exchanged.
Claim 2
Dependent Claim
45 words
A process for removal of phosphine from a mixture of monosilane and phosphine which comprises contacting said mixture with an improved K-A type zeolite in which approximately 33.3 to 83.3% and approximately 16.7 to 66.7% of potassium ion and zinc ion, respectively, are ion exchanged.
Claim 3
Dependent Claim
44 words
A process for removal of cis-2-butene from a mixture of unsaturated hydrocarbons, which comprises contacting said mixture with an improved K-A type zeolite in which approximately 33.3 to 83.3% and approximately 16.7 to 66.7% of potassium ion and zinc ion, respectively, are ion exchanged.
Claim 4
Dependent Claim
44 words
A process for removal of cis-2-butene from a mixture of unsaturated hydrocarbons, which comprises contacting said mixture with an improved K-A type zeolite in which approximately 33.3 to 83.3% and approximately 16.7 to 66.7% of potassium ion and zinc ion, respectively, are ion exchanged.
Claim 5
Dependent Claim
54 words
A process for removal of carbon dioxide from a mixture of low molecular weight saturated hydrocarbons which comprises contacting said mixture of low molecular weight saturated hydrocarbons with an improved K-A type zeolite in which approximately 33.3 to 83.3% and approximately 16.7 to 66.7% of potassium ion and zinc ion, respectively, are ion exchanged.
Claim 6
Dependent Claim
54 words
A process for removal of carbon dioxide from a mixture of low molecular weight saturated hydrocarbons which comprises contacting said mixture of low molecular weight saturated hydrocarbons with an improved K-A type zeolite in which approximately 33.3 to 83.3% and approximately 16.7 to 66.7% of potassium ion and zinc ion, respectively, are ion exchanged.
Claim 7
Dependent Claim
39 words
A process for dehydration which comprises contacting a material to be dehydrated with an improved K-A type zeolite in which approximately 33.3 to 83.3% and approximately 16.7 to 66.7% of potassium ion and zinc ion, respectively, are ion exchanged.
Claim 8
Dependent Claim
39 words
A process for dehydration which comprises contacting a material to be dehydrated with an improved K-A type zeolite in which approximately 33.3 to 83.3% and approximately 16.7 to 66.7% of potassium ion and zinc ion, respectively, are ion exchanged.
References Cited (Backward Citations)
US3785122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |