US3330778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of adsorbent beds with water-solvent-gas cycle
Assignee: Phillips Petroleum Co
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Filing: 1964-09-14
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Granted: 1967-07-11
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Expires: 1984-09-14
Abstract
No abstract record available.
Inventors
- 👤 Howard B Irvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:51
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/34; B01J20/3408; C; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD OF REGENERATING ZEOLITE ADSORBENTS THAT HAVE BEEN USED TO PURIFY TOLUENE SOLVENT FROM A BUTADIENE POLYMERIZATION PROCESS WHICH COMPRISES INTRODUCING SUFFICIENT WATER INTO THE ADSORBENT MICRO-STRUCTURE TO DESORB PREVIOUS ADSORBATE WHILE MAINTAINING THE ADSORBENT AT A TEMPERATURE NOT EXCEEDING 150*F., FLUSHING THE ADSORBENT WITH FRESH TOLUENE AT 180-220*F., THEN DRYING THE BED WITH A FLOW OF PURGE GAS AT 400-650*F.
Claim 2
Independent Claim
62 words
A METHOD OF REGENERATING ZEOLITE ADSORBENTS THAT HAVE BEEN USED TO PURIFY TOLUENE SOLVENT FROM A BUTADIENE POLYMERIZATION PROCESS WHICH COMPRISES INTRODUCING SUFFICIENT WATER INTO THE ADSORBENT MICRO-STRUCTURE TO DESORB PREVIOUS ADSORBATE WHILE MAINTAINING THE ADSORBENT AT A TEMPERATURE NOT EXCEEDING 150*F., FLUSHING THE ADSORBENT WITH FRESH TOLUENE AT 180-220*F., THEN DRYING THE BED WITH A FLOW OF PURGE GAS AT 400-650*F.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |