US3306845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage hydrofining process
Assignee: Union Oil Company of California
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Filing: 1964-08-04
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Granted: 1967-02-28
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Expires: 1984-08-04
Abstract
No abstract record available.
Inventors
- 👤 Harry F Poll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:35
CPC Classifications
C; C10; C10G; C10G65/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
210 words
A METHOD OF REFINING NITROGEN-CONTAINING NAPTHA, DIESEL AND GAS OIL FEED FRACTIONS WHICH REQUIRE DIFFERENT DEGREES OF REFINING COMPRISING: CATALYTICALLY HYDROFINING A RAW GAS OIL FEED IN A GAS OIL HYDROFINER OPERATED UNDER RELATIVELY MILD HYDROFINING CONDITIONS TO YIELD A GAS OIL EFFLUENT; FRACTIONATING SAID GAS OIL EFFLUENT TO RECOVER A PARTIALLY REFINED FIRST SYNTHETIC NAPHTHA FRACTION, A PARTIALLY REFINED SYNTHETIC DIESEL FRACTION AND A GAS OIL FRACTION, AND WITHDRAWING SAID GAS OIL FRACTION AS A TREATED GAS OIL PRODUCT OF REDUCED NITROGEN CONTENT; CATALYTICALLY HYDROFINING A RAW DIESEL FEED IN ADMIXTURE WITH SAID PARTIALLY REFINED SYNTHETIC DIESEL FRACTION IN A SEPARATE DIESEL HYDROFINER OPERATED UNDER HYDROFINING CONDITIONS RELATIVELY MORE SEVERE THAN EMPLOYED IN SAID GAS OIL HYDROFINING TO YIELD A DIESEL EFFLUENT; FRACTIONATING SAID DIESEL EFFLUENT TO RECOVER A SECOND PARTIALLY REFINED SYNTHETIC NAPHTHA FRACTION AND A DIESEL EFFLUENT FRACTION, AND WITHDRAWING SAID DIESEL EFFLUENT FRACTION AS A TREATED DIESEL PRODUCT OF REDUCED NITROGEN CONTENT; CATALYTICALLY HYDROFINING A RAW NAPHTHA FEED IN ADMIXTURE WITH SAID FIRST AND SAID SECOND SYNTHETIC NAPHTHA FRACTIONS IN A SEPARATE NAPHTHA HYDROFINER OPERATED UNDER RELATIVELY MORE SEVERE HYDROFINING CONDITIONS THAN EMPLOYED IN SAID DIESEL HYDROFINING TO YIELD A NAPHTHA EFFLUENT; AND RECOVERING A TREATED NPHTHA PRODUCT OF REDUCED NITROGEN CONTENT FROM SAID NAPHTHA EFFLUENET.
Claim 2
Independent Claim
210 words
A METHOD OF REFINING NITROGEN-CONTAINING NAPTHA, DIESEL AND GAS OIL FEED FRACTIONS WHICH REQUIRE DIFFERENT DEGREES OF REFINING COMPRISING: CATALYTICALLY HYDROFINING A RAW GAS OIL FEED IN A GAS OIL HYDROFINER OPERATED UNDER RELATIVELY MILD HYDROFINING CONDITIONS TO YIELD A GAS OIL EFFLUENT; FRACTIONATING SAID GAS OIL EFFLUENT TO RECOVER A PARTIALLY REFINED FIRST SYNTHETIC NAPHTHA FRACTION, A PARTIALLY REFINED SYNTHETIC DIESEL FRACTION AND A GAS OIL FRACTION, AND WITHDRAWING SAID GAS OIL FRACTION AS A TREATED GAS OIL PRODUCT OF REDUCED NITROGEN CONTENT; CATALYTICALLY HYDROFINING A RAW DIESEL FEED IN ADMIXTURE WITH SAID PARTIALLY REFINED SYNTHETIC DIESEL FRACTION IN A SEPARATE DIESEL HYDROFINER OPERATED UNDER HYDROFINING CONDITIONS RELATIVELY MORE SEVERE THAN EMPLOYED IN SAID GAS OIL HYDROFINING TO YIELD A DIESEL EFFLUENT; FRACTIONATING SAID DIESEL EFFLUENT TO RECOVER A SECOND PARTIALLY REFINED SYNTHETIC NAPHTHA FRACTION AND A DIESEL EFFLUENT FRACTION, AND WITHDRAWING SAID DIESEL EFFLUENT FRACTION AS A TREATED DIESEL PRODUCT OF REDUCED NITROGEN CONTENT; CATALYTICALLY HYDROFINING A RAW NAPHTHA FEED IN ADMIXTURE WITH SAID FIRST AND SAID SECOND SYNTHETIC NAPHTHA FRACTIONS IN A SEPARATE NAPHTHA HYDROFINER OPERATED UNDER RELATIVELY MORE SEVERE HYDROFINING CONDITIONS THAN EMPLOYED IN SAID DIESEL HYDROFINING TO YIELD A NAPHTHA EFFLUENT; AND RECOVERING A TREATED NPHTHA PRODUCT OF REDUCED NITROGEN CONTENT FROM SAID NAPHTHA EFFLUENET.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |