US2556438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercaptan extraction system
Assignee: Standard Oil Co
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Filing: 1948-08-07
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Granted: 1951-06-12
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Expires: 1968-08-07
Abstract
No abstract record available.
Inventors
- 👤 Howard A Parker
- 👤 George W Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:15
CPC Classifications
C; C10; C10G; C10G19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
THE PROCESS FOR REMOVING HIGH BOILING MERCAPTANS FROM A HYDROCARBON DISTILLATE BOILING IN THE RANGE OF ABOUT 325* F. TO ABOUT 650* F. WHICH PROCESS COMPRISES EXTRACTING SAID HYDROCARBON DISTILLATE WITH A SOLVENT MIXTURE CONSISTING ESSENTIALLY OF AN AQUEOUS POTASSIUM HYDROXIDE METHANOL CRESYLATE SOLUTION IN WHICH THE AQUEOUS POTASSIUM HYDROXIDE IS AN APPROXIMATELY 15 MOLAR POTASSIUM HYDROXIDE SOLUTION, METHANOL IS PRESENT IN AN AMOUNT IN THE RANGE OF 20 TO 40 VOLUMES PER 100 VOLUMES OF AQUEOUS POTASSIUM HYDROXIDE AND POTASSIUM CRESYLATE IS PRESENT IN AMOUNTS OF ABOUT 2 TO 20 VOLUMES PER 100 VOLUMES OF AQUEOUS POTASSIUM HYDROXIDE, WASHING BOTH METHANOL AND POTASSIUM HYDROXIDE FROM EXTRACTED HYDROCARBON DISTILLATE WITH A RECYCLED WATER STREAM FROM THE SOURCE HEREINAFTER DEFINED, INTRODUCING SOLVENT FROM THE EXTRACTION STEP TO THE UPPER PART OF A STRIPPING ZONE, SIMULTANEOUSLY INTROUCING WATER FROM THE WASHING STEP INTO THE STRIPPING ZONE, REMOVING IN VAPOR FORM FROM THE TOP OF SAID STRIPPING ZONE SUBSTANTIALLY ALL MERCAPTANS AND METHANOL AND MOST OF THE WATER TO LEAVE AS STRIPPER BOTTOMS POTASSIUM CRESYLATE AND CONCENTRATED
Claim 2
Dependent Claim
174 words
THE PROCESS FOR REMOVING HIGH BOILING MERCAPTANS FROM A HYDROCARBON DISTILLATE BOILING IN THE RANGE OF ABOUT 325* F. TO ABOUT 650* F. WHICH PROCESS COMPRISES EXTRACTING SAID HYDROCARBON DISTILLATE WITH A SOLVENT MIXTURE CONSISTING ESSENTIALLY OF AN AQUEOUS POTASSIUM HYDROXIDE METHANOL CRESYLATE SOLUTION IN WHICH THE AQUEOUS POTASSIUM HYDROXIDE IS AN APPROXIMATELY 15 MOLAR POTASSIUM HYDROXIDE SOLUTION, METHANOL IS PRESENT IN AN AMOUNT IN THE RANGE OF 20 TO 40 VOLUMES PER 100 VOLUMES OF AQUEOUS POTASSIUM HYDROXIDE AND POTASSIUM CRESYLATE IS PRESENT IN AMOUNTS OF ABOUT 2 TO 20 VOLUMES PER 100 VOLUMES OF AQUEOUS POTASSIUM HYDROXIDE, WASHING BOTH METHANOL AND POTASSIUM HYDROXIDE FROM EXTRACTED HYDROCARBON DISTILLATE WITH A RECYCLED WATER STREAM FROM THE SOURCE HEREINAFTER DEFINED, INTRODUCING SOLVENT FROM THE EXTRACTION STEP TO THE UPPER PART OF A STRIPPING ZONE, SIMULTANEOUSLY INTROUCING WATER FROM THE WASHING STEP INTO THE STRIPPING ZONE, REMOVING IN VAPOR FORM FROM THE TOP OF SAID STRIPPING ZONE SUBSTANTIALLY ALL MERCAPTANS AND METHANOL AND MOST OF THE WATER TO LEAVE AS STRIPPER BOTTOMS POTASSIUM CRESYLATE AND CONCENTRATED
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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |