Patent US3277199A successfully refreshed from Google Patents.
US3277199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective hydrofining
Assignee: Union Oil Company of California
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Filing: 1962-01-22
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Granted: 1966-10-04
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Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Harry F Poll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:51
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/148; C07C7/163; C10; C10G; C10G2400/00; C10G2400/30; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
THE METHOD FOR THE HYDROFINING A NAPHTHALENE CONTAINING FEEDSTOCK FOR THE REMOVAL OF INDENES, DIOLEFINS AND SULFUR IMPURITIES THEREFROM WHICH COMPRISES CONTACTING THE NAPHTHALENE FEEDSTOCK IN A FIRST STAGE WITH HYDROGEN AND A GRANULAR HYDROFINING CATALYST AT A TEMPERATURE BETWEEN ABOUT 300* AND 550*F. AND LIQUID HOURLY SPACE VELOCITIES BETWEEN ABOUT 1 TO 10 VOLUMES PER VOLUME PER HOUR TO THEREBY HYDROGENATE SAID IDENE IMPURITIES AND THEREAFTER CONTACTING THE RESULTANT PARTIALLY PURIFIED FEEDSTOCK WITH HYDROGEN AND A GRANULAR HYDROFINING CATALYST IN A SECOND STAGE AT A TEMPERATURE BETWEEN ABOUT 500* AND ABOUT 775*F. AND A LIQUID HOURLY SPACED VELOCITY BETWEEN ABOUT 1 AND ABOUT 5 VOLUMES PER VOLUME PER HOUR TO EFFECT REMOVAL OF THE REMAINING IMPURITIES OF SAID FEEDSTOCK.
Claim 2
Independent Claim
120 words
THE METHOD FOR THE HYDROFINING A NAPHTHALENE CONTAINING FEEDSTOCK FOR THE REMOVAL OF INDENES, DIOLEFINS AND SULFUR IMPURITIES THEREFROM WHICH COMPRISES CONTACTING THE NAPHTHALENE FEEDSTOCK IN A FIRST STAGE WITH HYDROGEN AND A GRANULAR HYDROFINING CATALYST AT A TEMPERATURE BETWEEN ABOUT 300* AND 550*F. AND LIQUID HOURLY SPACE VELOCITIES BETWEEN ABOUT 1 TO 10 VOLUMES PER VOLUME PER HOUR TO THEREBY HYDROGENATE SAID IDENE IMPURITIES AND THEREAFTER CONTACTING THE RESULTANT PARTIALLY PURIFIED FEEDSTOCK WITH HYDROGEN AND A GRANULAR HYDROFINING CATALYST IN A SECOND STAGE AT A TEMPERATURE BETWEEN ABOUT 500* AND ABOUT 775*F. AND A LIQUID HOURLY SPACED VELOCITY BETWEEN ABOUT 1 AND ABOUT 5 VOLUMES PER VOLUME PER HOUR TO EFFECT REMOVAL OF THE REMAINING IMPURITIES OF SAID FEEDSTOCK.
Claim 3
Independent Claim
112 words
A METHOD FOR THE SELECTIVE HYDROFINING OF A FEEDSTOCK CONTAINING NAPHTHALENES, INDENES, SULFUR AND NITROGEN IMPURITIES WHICH COMPRISES CONTACTING SAID FEEDSTOCK IN A FIRST STAGE WITH HYDROGEN AND A HYDROFINING CATALYST AT MILD HYDROGENATION CONDITIONS INCLUDING A TEMPERATURE BETWEEN ABOUT 300* AND 550*F. AND A LIQUID HOURLY SPACE VELOCITY BETWEEN ABOUT 1 AND ABOUT 10 VOLUMES PER VOLUME PER HOUR SO AS TO SATURATE SAID INDENES AND, THEREAFTER, CONTACTING THE RESULTANT INTERMEDIATE PRODUCT IN A SECOND STAGE WITH HYDROGEN AND A HYDROFINING CATALYST AT MORE SEVER CONDITIONS, INCLUDING A TEMPERATURE BETWEEN ABOUT 500* AND 775*F. AND A LIQUID HOURLY SPACE VELOCITY BETWEEN ABOUT 1 AND ABOUT 10 VOLUMES PER VOLUME PER HOUR.
Claim 4
Independent Claim
112 words
A METHOD FOR THE SELECTIVE HYDROFINING OF A FEEDSTOCK CONTAINING NAPHTHALENES, INDENES, SULFUR AND NITROGEN IMPURITIES WHICH COMPRISES CONTACTING SAID FEEDSTOCK IN A FIRST STAGE WITH HYDROGEN AND A HYDROFINING CATALYST AT MILD HYDROGENATION CONDITIONS INCLUDING A TEMPERATURE BETWEEN ABOUT 300* AND 550*F. AND A LIQUID HOURLY SPACE VELOCITY BETWEEN ABOUT 1 AND ABOUT 10 VOLUMES PER VOLUME PER HOUR SO AS TO SATURATE SAID INDENES AND, THEREAFTER, CONTACTING THE RESULTANT INTERMEDIATE PRODUCT IN A SECOND STAGE WITH HYDROGEN AND A HYDROFINING CATALYST AT MORE SEVER CONDITIONS, INCLUDING A TEMPERATURE BETWEEN ABOUT 500* AND 775*F. AND A LIQUID HOURLY SPACE VELOCITY BETWEEN ABOUT 1 AND ABOUT 10 VOLUMES PER VOLUME PER HOUR.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |