US2673834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of phenol alkylates
Assignee: Gulf Research and Development Co
•
Filing: 1949-10-31
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Granted: 1954-03-30
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Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 Donald R Stevens
- 👤 Samuel C Camp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:13
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/68; C07C37/70; C07C37/74; C07C37/72; C07C37/82; C07C37/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A METHOD OF INHIBITING THE DEALKYLATION OF CRUDE ACIDIC ALKYLATED PHENOLS AT ELEVATED TEMPERATURES WHICH COMPRISES WASHING SAID ALKYLATED PHENOLS WITH A NON-ACID AQUEOUS MEDIUM TO REMOVE SUBSTANTIALLY ALL OF THE WATER-SOLUBLE AND THE EASILY NEUTRALIZABLE ACIDIC MATERIAL, STABILIZING THE WASHED ALKYLATE BY CONTACTING SAID WASHED ALKYLATE WITH AN ADSORBENT CLAY AT A TEMPERATURE BETWEEN ABOUT 70* AND 150* C. FOR A TIME SUFFICIENT TO EFFECT STABILIZATION OF THE ALKYLATE BUT INSUFFICIENT TO EFFECT DEALKYLATION OF THE ALKYLATE, AND SEPARATING THE STABILIZED ALKYLATE FROM THE ADSORBENT CLAY.
Claim 2
Independent Claim
87 words
A METHOD OF INHIBITING THE DEALKYLATION OF CRUDE ACIDIC ALKYLATED PHENOLS AT ELEVATED TEMPERATURES WHICH COMPRISES WASHING SAID ALKYLATED PHENOLS WITH A NON-ACID AQUEOUS MEDIUM TO REMOVE SUBSTANTIALLY ALL OF THE WATER-SOLUBLE AND THE EASILY NEUTRALIZABLE ACIDIC MATERIAL, STABILIZING THE WASHED ALKYLATE BY CONTACTING SAID WASHED ALKYLATE WITH AN ADSORBENT CLAY AT A TEMPERATURE BETWEEN ABOUT 70* AND 150* C. FOR A TIME SUFFICIENT TO EFFECT STABILIZATION OF THE ALKYLATE BUT INSUFFICIENT TO EFFECT DEALKYLATION OF THE ALKYLATE, AND SEPARATING THE STABILIZED ALKYLATE FROM THE ADSORBENT CLAY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |