US3929669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing an adsorbent useful for olefin separation
Assignee: Universal Oil Products Co
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Filing: 1972-12-22
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Granted: 1975-12-30
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Expires: 1992-12-22
Abstract
Abstract A process for the production of a type X structured crystalline aluminosilicate adsorbent useful in the separation of olefins from a hydrocarbon mixture comprising olefins and paraffins. The process basically comprises contacting a precursor mass containing type X structured crystalline aluminosilicate and amorphous material as a binder with an aqueous caustic solution to effect the addition of alkali metal cation to the crystalline structure thereby producing an adsorbent which has both increased capacity for olefins and decreased catalytic activity.
Inventors
- 👤 Donald H Rosback
- 👤 Richard W Neuzil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:37
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; C07; C07C; C07C7/00; C07C7/12; C07C7/13; Y; Y10; Y10S; Y10S423/00; Y10S423/21
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
A METHOD FOR THE PRODUCTION OF IMPROVED ABSORBENT PARTICLES COMPRISING A SODIUM FORM X STRUCTURE ZEOLITE HAVING INCREASED ADSORPTIVE CAPACITY FOR OLEFINS AND DECREASED CATALYTIC ACTIVITY FROM A PRECURSOR MASS COMPRISING AN X STRUCTURED ZEOLITE AND HAVING A NA2O/AL2O3 RATIO LESS THAN ABOUT 0.7, WHICH METHOD COMPRISES THE STEPS OF: A. CONTACTING SAID PRECURSOR MASS WITH AN AQUEOUS SODIUM HYDROXIDE SOLUTION AT ION EXCHANGE CONDITIONS TO INCREASE THE SODIUM CATION CONTENT TO A NA2O/AL2O3 RATIO OF GREATER THAN ABOUT 0.7 AND TO REMOVE FROM ABOUT 1 TO ABOUT 15 WT. % OF SILICA AND ALUMINA FROM THE PRECURSOR MASS; B. WASHING SAID MASS WITH WATER TO REMOVE THEREFROM EXCESS SODIUM HYDROXIDE; AND, C. AT LEAST PARTIALLY DEHYDRATING SAID MASS AT DEHYDRATING CONDITION.
Claim 2
Independent Claim
122 words
A METHOD FOR THE PRODUCTION OF IMPROVED ABSORBENT PARTICLES COMPRISING A SODIUM FORM X STRUCTURE ZEOLITE HAVING INCREASED ADSORPTIVE CAPACITY FOR OLEFINS AND DECREASED CATALYTIC ACTIVITY FROM A PRECURSOR MASS COMPRISING AN X STRUCTURED ZEOLITE AND HAVING A NA2O/AL2O3 RATIO LESS THAN ABOUT 0.7, WHICH METHOD COMPRISES THE STEPS OF: A. CONTACTING SAID PRECURSOR MASS WITH AN AQUEOUS SODIUM HYDROXIDE SOLUTION AT ION EXCHANGE CONDITIONS TO INCREASE THE SODIUM CATION CONTENT TO A NA2O/AL2O3 RATIO OF GREATER THAN ABOUT 0.7 AND TO REMOVE FROM ABOUT 1 TO ABOUT 15 WT. % OF SILICA AND ALUMINA FROM THE PRECURSOR MASS; B. WASHING SAID MASS WITH WATER TO REMOVE THEREFROM EXCESS SODIUM HYDROXIDE; AND, C. AT LEAST PARTIALLY DEHYDRATING SAID MASS AT DEHYDRATING CONDITION.
Claim 3
Dependent Claim
28 words
The process of claim 1 further characterized in that said contacting is effected at a temperature within the range of from about 50* F. to about 300* F.
Claim 4
Dependent Claim
44 words
The process of claim 1 further characterized in that said ion exchange conditions include a temperature within the range of from about 50* F. to about 300* F. and a sodium hydroxide solution concentration of from about 0.5 to about 10 wt. % NaOH.
Claim 5
Dependent Claim
42 words
The process of claim 1 further characterized in that said ion exchange conditions include a temperature within the range of from about 150*to F. to abouT 250* F. and a sodium hydroxide solution concentration of from about 0.5 to 5 wt. %
Claim 6
Dependent Claim
27 words
The process of claim 1 further characterized in that said dehydration conditions include a temperature within the range of from about 100* F. to about 1000* F.
Claim 7
Dependent Claim
27 words
The process of claim 1 further characterized in that the wash water in step (b) is maintained at a pH within the range of 7 to 10.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |