US4430197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen donor cracking with donor soaking of pitch
Assignee: ConocoPhillips Co
•
Filing: 1982-04-05
•
Granted: 1984-02-07
•
Expires: 2002-04-05
Abstract
Abstract A hydrogen donor diluent cracking process in which the pitch fraction from the cracking step is heat soaked in the presence of hydrogen donor solvent and then returned to the cracking coil.
Inventors
- 👤 Paul C. Poynor
- 👤 Hugh E. Romine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:08
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/32; C10G47/34; C10G51/00; C10G51/02; C10G51/023
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
In a hydrogen donor diluent cracking process in which a heavy hydrocarbonaceous material is thermally cracked in a cracking coil in the presence of hydrogen donor solvent, and in which spent donor is separated from cracked products, rehydrogenated and recycled to the cracking step, the improvement wherein at least part of the pitch fraction from the cracked products is heat soaked in a soaking tank separate from said cracking coil in the presence of hydrogenated donor solvent for a time and at a temperature sufficient to substantially reduce the amount of material in said pitch which is insoluble in pentane and said heat-soaked pitch is returned to said cracking coil.
Claim 2
Dependent Claim
110 words
In a hydrogen donor diluent cracking process in which a heavy hydrocarbonaceous material is thermally cracked in a cracking coil in the presence of hydrogen donor solvent, and in which spent donor is separated from cracked products, rehydrogenated and recycled to the cracking step, the improvement wherein at least part of the pitch fraction from the cracked products is heat soaked in a soaking tank separate from said cracking coil in the presence of hydrogenated donor solvent for a time and at a temperature sufficient to substantially reduce the amount of material in said pitch which is insoluble in pentane and said heat-soaked pitch is returned to said cracking coil.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the entire pitch fraction from said cracked products is heat soaked.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein said part of said pitch fraction is heat soaked at a temperature of from 500° to 850° F.
Claim 5
Dependent Claim
33 words
The process of claim 3 wherein said part of said pitch fraction is heat soaked for a period of from 1 to 3 hours at a temperature of from 600 to 700° F.
Claim 6
Dependent Claim
32 words
The process of claim 3 wherein said part of said pitch fraction is heat soaked until the amount of pentane insolubles in said pitch fraction is reduced by more than 50 percent.
Claim 7
Dependent Claim
33 words
The process of claim 3 wherein said part of said pitch fraction is heat soaked in the presence of from 0.5 to 2.0 volumes of hydrogen donor solvent per volume of pitch treated.
References Cited (Backward Citations)
CA553169A
Cited
GB786451A
Cited
US2873245A
Cited
US3238118A
Cited
US3817853A
Cited
US4090947A
Cited
US4101416A
Cited
US4115246A
Cited
US4178229A
Cited
US4213846A
Cited
US4363716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |