US4235699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solubilization of coal with hydrogen sulfide and carbon monoxide
Assignee: Honeywell International Inc
•
Filing: 1979-03-05
•
Granted: 1980-11-25
•
Expires: 1999-03-05
Abstract
Abstract Conversion of coal to products soluble in common solvents and conversion of coal tar to products of lower molecular weight, effected in liquid or fused reaction medium using a hydrogenating reactant, are carried out employing hydrogen sulfide and carbon monoxide as the sole or major hydrogenating reactant, without need of elemental hydrogen or a hydrogen donor solvent.
Inventors
- 👤 Charles T. Ratcliffe
- 👤 Mahmoud B. Abdel-Baset
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:49
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/06; Y; Y10; Y10S; Y10S208/00; Y10S208/951
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
In a process for conversion, in liquid or fused reaction medium using a hydrogenating reactant, of a substrate of the group consisting of coal and coal tar and mixtures thereof to products of lower molecular weight than the starting material and soluble in ethyl acetate: the improvement which comprises employing as the sole hydrogenating reactant, such reactant consisting essentially of hydrogen sulfide and carbon monoxide.
Claim 2
Dependent Claim
65 words
In a process for conversion, in liquid or fused reaction medium using a hydrogenating reactant, of a substrate of the group consisting of coal and coal tar and mixtures thereof to products of lower molecular weight than the starting material and soluble in ethyl acetate: the improvement which comprises employing as the sole hydrogenating reactant, such reactant consisting essentially of hydrogen sulfide and carbon monoxide.
Claim 3
Dependent Claim
34 words
Process in accordance with claim 1 wherein the reaction medium consists essentially of at least one high boiling compound having an aromatic nucleus and having atmospheric pressure boiling point of at least 200° C.
Claim 4
Dependent Claim
12 words
Process in accordance with claim 1 wherein the substrate is coal tar.
Claim 5
Dependent Claim
25 words
Process in accordance with claim 2 wherein the substrate is coal having fixed carbon content in the range between 35% and 70% by weight, moisture-free.
Claim 6
Dependent Claim
20 words
Process in accordance with claim 4 wherein the substrate is high volatile bituminous coal and the reaction medium is 1-methylnaphthalene.
Claim 7
Dependent Claim
39 words
Process in accordance with claim 4 wherein the initial weight ratio of hydrogen sulfide: dry coal is between 0.1:1 and 20:1; the operating pressure is 500-5,000 psi (3,447-34,470 kPa) and the reaction temperature is in the range 350°-450° C.
Claim 8
Dependent Claim
25 words
Process in accordance with claim 5 wherein the carbon monoxide and hydrogen sulfide reactants are introduced at about 5:1 mole ratio of carbon monoxide:hydrogen sulfide.
References Cited (Backward Citations)
US3030297A
Cited
US3503863A
Cited
US3640816A
Cited
US3796653A
Cited
US3954596A
Cited
US4077867A
Cited
US4115075A
Cited
US4159936A
Cited
US4094765A
Cited
DE2820087A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |