US3725299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of molecular sieves having sulfur compounds adsorbed thereon
Assignee: Union Carbide Corp
•
Filing: 1970-08-06
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Granted: 1973-04-03
•
Expires: 1990-08-06
Abstract
Abstract The sweetening of natural gasoline liquid fractions employing molecular sieve type adsorbents to selectively adsorb the sulfur compound impurities is accomplished using a minimum of nonsorbable purge gas for regeneration purposes. The process comprises using a low boiling condensable paraffin to purge the sulfur compounds from the principal adsorption bed, condensing said paraffin, purifying same in the liquid phase by passage through a large pore molecular sieve bed, and thereafter removing the sulfur compounds from the latter bed with a non-sorbable purge gas.
Inventors
- 👤 P Turnock
- 👤 W Bancroft
- 👤 M Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:14
CPC Classifications
C; C10; C10G; C10G25/00; C10G25/02; C10G25/03; C10G25/05; C01; C01B; C01B33/00; C01B33/20; C01B33/26; C01B33/28; C01B33/2807; Y; Y02; Y02P; Y02P20/00; Y02P20/141; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/517
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
Process according to claim 1 wherein the sulfur compounds initially present on the primary bed are present as a result of having been selectively adsorbed from a full range natural gasoline feedstock.
Claim 2
Dependent Claim
31 words
Process according to claim 2 wherein the normally gaseous readily condensible paraffin desorbent comprises propane and the molecular sieve adsorbent in both the primary and secondary adsorbent beds is zeolite X.
References Cited (Backward Citations)
US3010894A
Cited
US3085380A
Cited
US3211644A
Cited
US3051646A
Cited
US3188293A
Cited
US3306945A
Cited
US3470677A
Cited
US3566611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |