US3089841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining process for petroleum wax
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1959-12-30
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Granted: 1963-05-14
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Expires: 1979-12-30
Abstract
No abstract record available.
Inventors
- 👤 Edward B Berkowitz
- 👤 Theodore E Makowski
- 👤 Byron G Spars
- 👤 Norton H Berlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:43
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/42; C10G73/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A METHOD FOR HYDROFINING PETROLEUM WAXES WHICH COMPRISES CONTCTING THE WAX IN ADMIXTURE WITH HYDROGEN, AND A HYDROGENATION CATALYST UNDER HYDROFINING CONDITIONS IN A REACTION ZONE AT A TEMPERATURE IN THE RANGE OF 400 TO 650*F., THEREBY PRODUCING A HIGH QUALITY WAX, CONTINUING TO SUPPLY WAX TO SAID REACTION ZONE UNDER SAID HYDROFINING CONDITIONS UNTIL THE CATAYST HAS BECOME DEACTIVATED DUE TO THE ADSORPTION OF CATALYST DEACTIVATING CONTAMINANTS TO A POINT WHERE HIGH QUALITY WAX IS NO LONGER PRODUCED; INCREASING THE REACTION TEMPERATURE TO A TEMPERATURE OF AT LEAST ABOUT 100*F. ABOVE THE HYDROFINING TEMPERATURE AT WHICH SAID HGH QUALITY WAX WAS OBTAINED AND AT WHICH SAID CATALYST DEACTIVATING CONTAMINANTS WERE ADSORBED ON SAID CATALYST; CONTINUING TO FEED SAID WAX THROUGH SAID REACTION ZONE AT SAID HIGHER TEMPERATURE FOR A PERIOD FROM ABOUT 6 TO ABOUT 72 HOURS DURING WHICH TIME THE SAID CATALYST DEACTIVATING MATERIALS ARE REMOVED FROM THE CATALYST, THEN LOWERING THE TEMPERATURE IN THE SAID REACTION ZONE TO ABOUT SAID FIRST HYDROFINING TEMPERATURE TO AGAIN PRODUCE HIGH QUALITY WAX.
Claim 2
Independent Claim
172 words
A METHOD FOR HYDROFINING PETROLEUM WAXES WHICH COMPRISES CONTCTING THE WAX IN ADMIXTURE WITH HYDROGEN, AND A HYDROGENATION CATALYST UNDER HYDROFINING CONDITIONS IN A REACTION ZONE AT A TEMPERATURE IN THE RANGE OF 400 TO 650*F., THEREBY PRODUCING A HIGH QUALITY WAX, CONTINUING TO SUPPLY WAX TO SAID REACTION ZONE UNDER SAID HYDROFINING CONDITIONS UNTIL THE CATAYST HAS BECOME DEACTIVATED DUE TO THE ADSORPTION OF CATALYST DEACTIVATING CONTAMINANTS TO A POINT WHERE HIGH QUALITY WAX IS NO LONGER PRODUCED; INCREASING THE REACTION TEMPERATURE TO A TEMPERATURE OF AT LEAST ABOUT 100*F. ABOVE THE HYDROFINING TEMPERATURE AT WHICH SAID HGH QUALITY WAX WAS OBTAINED AND AT WHICH SAID CATALYST DEACTIVATING CONTAMINANTS WERE ADSORBED ON SAID CATALYST; CONTINUING TO FEED SAID WAX THROUGH SAID REACTION ZONE AT SAID HIGHER TEMPERATURE FOR A PERIOD FROM ABOUT 6 TO ABOUT 72 HOURS DURING WHICH TIME THE SAID CATALYST DEACTIVATING MATERIALS ARE REMOVED FROM THE CATALYST, THEN LOWERING THE TEMPERATURE IN THE SAID REACTION ZONE TO ABOUT SAID FIRST HYDROFINING TEMPERATURE TO AGAIN PRODUCE HIGH QUALITY WAX.
References Cited (Backward Citations)
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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) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |