US4374016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hydrogenating coal and coal solvents
Assignee: Air Products and Chemicals Inc
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Filing: 1981-08-24
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Granted: 1983-02-15
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Expires: 2001-08-24
Abstract
Abstract A novel process is described for the hydrogenation of coal by the hydrogenation of a solvent for the coal in which the hydrogenation of the coal solvent is conducted in the presence of a solvent hydrogenation catalyst of increased activity, wherein the hydrogenation catalyst is produced by reacting ferric oxide with hydrogen sulfide at a temperature range of 260° C. to 315° C. in an inert atmosphere to produce an iron sulfide hydrogenation catalyst for the solvent. Optimally, the reaction temperature is 275° C. Alternately, the reaction can be conducted in a hydrogen atmosphere at 350° C.
Inventors
- 👤 Arthur R. Tarrer
- 👤 Ketan G. Shridharani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:09
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/08; C10G1/086; B; B01; B01J; B01J27/00; B01J27/02; B01J27/04; B01J27/043; C10G45/00; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
In a process for hydrogenating coal wherein a coal solvent is hydrogenated in the presence of a hydrogenation catalyst and that hydrogenated solvent in turn hydrogenates the coal, the improvement comprising carrying out the solvent hydrogenation in the presence of an iron sulfide catalyst of increased catalytic activity prepared by the reaction of ferric oxide with hydrogen sulfide within a temperature range of 260° to 315° C. in a non-oxidizing atmosphere.
Claim 2
Dependent Claim
71 words
In a process for hydrogenating coal wherein a coal solvent is hydrogenated in the presence of a hydrogenation catalyst and that hydrogenated solvent in turn hydrogenates the coal, the improvement comprising carrying out the solvent hydrogenation in the presence of an iron sulfide catalyst of increased catalytic activity prepared by the reaction of ferric oxide with hydrogen sulfide within a temperature range of 260° to 315° C. in a non-oxidizing atmosphere.
Claim 3
Dependent Claim
16 words
The invention of claim 1 wherein the temperature of the catalyst preparation reaction is 275° C.
Claim 4
Dependent Claim
19 words
The invention of claim 1 or 2 wherein the catalyst preparation reaction in conducted in the absence of hydrogen.
Claim 5
Dependent Claim
26 words
The invention of claim 1 or 2 wherein the catalyst reaction product is stored in an inert atmosphere prior to use in a solvent hydrogenation reaction.
Claim 6
Dependent Claim
27 words
The invention of claim 1 or 2 wherein the hydrogenation reaction of the coal with the hydrogenated solvent is conducted in the presence of a hydrogen atmosphere.
Claim 7
Dependent Claim
68 words
In a process for hydrogenating coal wherein a coal solvent is hydrogenated in the presence of a hydrogenation catalyst and that hydrogenated solvent in turn hydrogenates the coal, the improvement comprising carrying out the solvent hydrogenation in the presence of an iron sulfide catalyst of increased catalytic activity prepared by the reaction of ferric oxide with hydrogen sulfide at a temperature of 350° C. in a hydrogen atmosphere.
Claim 8
Dependent Claim
68 words
In a process for hydrogenating coal wherein a coal solvent is hydrogenated in the presence of a hydrogenation catalyst and that hydrogenated solvent in turn hydrogenates the coal, the improvement comprising carrying out the solvent hydrogenation in the presence of an iron sulfide catalyst of increased catalytic activity prepared by the reaction of ferric oxide with hydrogen sulfide at a temperature of 350° C. in a hydrogen atmosphere.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |