US4048111A
Expired / Lapsed
US
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Method for manufacturing an adsorbent useful for olefin separation
Assignee: Honeywell UOP LLC
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Filing: 1976-06-07
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Granted: 1977-09-13
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Expires: 1996-06-07
Abstract
Abstract A method for the production of an adsorbent, having increased capacity for olefins and decreased catalytic activity for polymerization and isomerization, useful in the separation of olefins from a hydrocarbon mixture comprising olefins and paraffins. The methods basically comprises contacting a precursor mass comprising sodium X or sodium Y zeolite and amorphous material selected from the group consisting of silica, alumina and silica-alumina mixtures and compounds as a binder with an aqueous sodium hydroxide solution to increase the sodium cation content of the zeolite and to remove a small portion of silica and alumina; washing the zeolite with water to remove excess caustic solution; and, drying the zeolite to reduce the volatile content.
Inventors
- 👤 Donald H. Rosback
- 👤 Richard W. Neuzil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:53
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
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
A method for the production of improved adsorbent particles having increased capacity for olefins and decreased catalytic activity from a precursor mass comprising sodium Y zeolite having a Na 2 O/Al 2 O 3 ratio less than about 0.7 and amorphous material selected from the group consisting of silica, alumina and slica-alumina mixtures and silica-alumina compounds 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 Na 2 O/Al 2 O 3 ratio of greater than about 0.7 and to remove from about 1 to about 15 wt. % 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 conditions.
Claim 2
Independent Claim
138 words
A method for the production of improved adsorbent particles having increased capacity for olefins and decreased catalytic activity from a precursor mass comprising sodium Y zeolite having a Na 2 O/Al 2 O 3 ratio less than about 0.7 and amorphous material selected from the group consisting of silica, alumina and slica-alumina mixtures and silica-alumina compounds 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 Na 2 O/Al 2 O 3 ratio of greater than about 0.7 and to remove from about 1 to about 15 wt. % 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 conditions.
Claim 3
Dependent Claim
44 words
The method 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 0.05 to about 10 wt. % NaOH.
Claim 4
Dependent Claim
43 words
The method of claim 2 further characterized in that said ion exchange conditions include a temperature within the range of the from about 150° F. to about 250° F. and a sodium hydroxide solution concentration of from about 0.5 to 5 wt. %.
Claim 5
Dependent Claim
27 words
The method 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 6
Dependent Claim
27 words
The method 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.
Claim 7
Dependent Claim
126 words
An improved adsorbent having increased capacity for olefins and decreased catalytic activity produced by the steps of: a. contacting a precursor mass comprising sodium Y zeolite having a Na 2 O/Al 2 O 3 ratio less than about 0.7 and amorphous material selected from the group consisting of silica and alumina and silica-alumina mixtures and compounds with an aqueous sodium hydroxide solution at ion exchange conditions to increase the sodium cation content to a Na 2 O/Al 2 O 3 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 conditions.
Claim 8
Dependent Claim
126 words
An improved adsorbent having increased capacity for olefins and decreased catalytic activity produced by the steps of: a. contacting a precursor mass comprising sodium Y zeolite having a Na 2 O/Al 2 O 3 ratio less than about 0.7 and amorphous material selected from the group consisting of silica and alumina and silica-alumina mixtures and compounds with an aqueous sodium hydroxide solution at ion exchange conditions to increase the sodium cation content to a Na 2 O/Al 2 O 3 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 conditions.
Claim 9
Dependent Claim
26 words
The adsorbent of claim 6 further characterized in that the volatile content of said adsorbent is less than about 10 wt. % LOI at 900° C.
Claim 10
Dependent Claim
25 words
The adsorbent of claim 6 further characterized in that it is in a particle size range of about 16 to about 40 U.S. Standard mesh.
References Cited (Backward Citations)
US3929669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |