Patent US3669876A successfully refreshed from Google Patents.
US3669876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hf extraction and asphaltene cracking process
Assignee: Universal Oil Products Co
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Filing: 1970-12-18
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Granted: 1972-06-13
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Expires: 1990-12-18
Abstract
Abstract A hydrocarbonaceous black oil is subjected to HF extraction for the separation of hetero compounds and highly condensed aromatics from a less soluble raffinate. The extract phase, after separation of the raffinate, but containing HF, is subjected to cracking conditions, and preferably in the presence of a hydrogen donor. The effluent is separated to recover the HF which is recycled to the extraction zone.
Inventors
- 👤 Charles V Berger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:40
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/04; C10G67/0454; C10G67/049; C10G21/00; C10G21/06; C10G21/08; C10G55/00; C10G55/02; C10G55/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
15 words
The process of claim 1 further characterized in that said hydrogen fluoride is substantially anhydrous.
Claim 2
Dependent Claim
36 words
The process of claim 1 further characterized in that said conditions include a temperature in the range of 100* F. to about 250* F. and a pressure sufficient to maintain said hydrogen fluoride in liquid phase.
Claim 3
Dependent Claim
31 words
The process of claim 1 further characterized in that the temperature of said extract phase is increased to a level in the range of about 250* F. to about 450* F.
Claim 4
Dependent Claim
18 words
The process of claim 1 further characterized in that a light paraffin is admixed with said charge stock.
Claim 5
Dependent Claim
18 words
The process of claim 1 further characterized in that a light paraffin is introduced into said cracking zone.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |