US4036736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing synthetic coking coal and treating cracked oil
Assignee: Eneos Corp
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Filing: 1976-03-12
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Granted: 1977-07-19
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Expires: 1996-03-12
Abstract
Abstract Synthetic coking coal is produced by coking heavy hydrocarbons at a temperature greater than the temperatures which initiate cracking in the coker, and by removing the gaseous and liquid products from the coker at accelerated velocities. The thermally cracked oil produced in the coking reaction can be hydrodesulfurized to produce a low sulfur fuel oil.
Inventors
- 👤 Hiromi Ozaki
- 👤 Mamoru Yamane
- 👤 Haruo Yoshikai
- 👤 Hachio Kodama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:46
CPC Classifications
C; C10; C10B; C10B55/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
A process for producing synthetic coking coal which comprises delayed coking a heavy hydrocarbon oil by: heating said heavy hydrocarbon oil in a furnace to a coking temperature of from about 380° to about 500° C. and sufficient to initiate cracking; then introducing the heated heavy hydrocarbon oil into a coking drum; maintaining the heavy hydrocarbon oil in said coking drum for a time ranging from 1/2 to about 36 hours at said coking temperatures to effect coking thereof; introducing a diluent gas into the body of said hydrocarbon oil in the coling drum at a flow rate greater than 5 l/hr kg of heavy hydrocarbon oil to maintain the partial vapor pressure of the cracking product vapor over said heavy hydrocarbon oil in said coking drum at about 50 to about 600 mm Hg during said coking; and recovering a synthetic coking coal having a free-swelling index greater than 4 and containing 20-40 wt.% volatile matter.
Claim 2
Dependent Claim
157 words
A process for producing synthetic coking coal which comprises delayed coking a heavy hydrocarbon oil by: heating said heavy hydrocarbon oil in a furnace to a coking temperature of from about 380° to about 500° C. and sufficient to initiate cracking; then introducing the heated heavy hydrocarbon oil into a coking drum; maintaining the heavy hydrocarbon oil in said coking drum for a time ranging from 1/2 to about 36 hours at said coking temperatures to effect coking thereof; introducing a diluent gas into the body of said hydrocarbon oil in the coling drum at a flow rate greater than 5 l/hr kg of heavy hydrocarbon oil to maintain the partial vapor pressure of the cracking product vapor over said heavy hydrocarbon oil in said coking drum at about 50 to about 600 mm Hg during said coking; and recovering a synthetic coking coal having a free-swelling index greater than 4 and containing 20-40 wt.% volatile matter.
Claim 3
Dependent Claim
13 words
The process of claim 1, wherein said diluent gas is an inert gas.
Claim 4
Dependent Claim
11 words
The process of claim 1, wherein said diluent is a hydrocarbon.
Claim 5
Dependent Claim
20 words
The process of claim 1, wherein the partial pressure of said cracking product is from 50 to 500 mm Hg.
Claim 6
Dependent Claim
14 words
The process of claim 1, wherein the temperature is from 400° - 460° C.
Claim 7
Dependent Claim
23 words
The process of claim 1, wherein said diluent gas is fed at a rate of from 30 to 500 l/hr.kg of heavy hydrocarbon.
Claim 8
Dependent Claim
17 words
The process of claim 1, wherein the coking time is as is set forth in FIG. 1.
Claim 9
Dependent Claim
20 words
The process of claim 1, wherein said diluent gas is introduced into the coking drum with the heavy hydrocarbon oil.
Claim 10
Dependent Claim
30 words
The method of claim 8, wherein the diluent gas is introduced into the heavy hydrocarbon oil before it is heated in the furnace to a temperature sufficient to initiate cracking.
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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |