US4142875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the purification of scrubbing solvents by removal of Ni(CO).sub.
Assignee: Veba Oel AG
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Filing: 1977-03-10
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Granted: 1979-03-06
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Expires: 1997-03-10
Abstract
Abstract A process for the purification of pressurized gases, such as those emanating from the partial gasification resp. combustion of fuel, which gases contain Ni(CO) 4 , which comprises contacting said Ni(O) 4 containing gas with a solvent at a temperature of from -60 to 0° C., thereby forming a solution containing the gases and dissolved Ni(CO) 4 , and thereafter heating said solution at a temperature of from 70 to 250° C. for at least 0.25 hour at a pressure higher than the vapor pressure of said solvent, thereby precipitating and thereafter recovering nickel compound and releasing a purified solvent.
Inventors
- 👤 Gerd Bohmholdt
- 👤 Gunter Deininger
- 👤 Hans-Otto Gerlach
- 👤 Winfried Hahn
- 👤 Wilhelm Huwels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:55
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/14; C; C10; C10K; C10K1/00; C10K1/08; C10K1/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
A process for the purification of pressurized gases containing Ni(CO) 4 which comprises contacting said Ni(CO) 4 containing gases with a solvent at a temperature from -60° to 0° C. and thereafter precipitating nickel from the solution by heating the resultant solution at a temperature of from 70° to 250° C. for at least 0.25 hour at a pressure higher than the vapor pressure of the scrubbing liquid and removing the precipitate.
Claim 2
Dependent Claim
72 words
A process for the purification of pressurized gases containing Ni(CO) 4 which comprises contacting said Ni(CO) 4 containing gases with a solvent at a temperature from -60° to 0° C. and thereafter precipitating nickel from the solution by heating the resultant solution at a temperature of from 70° to 250° C. for at least 0.25 hour at a pressure higher than the vapor pressure of the scrubbing liquid and removing the precipitate.
Claim 3
Dependent Claim
17 words
A process according to claim 1 wherein the solvent is heated for from 0.5 to 2.0 hours.
Claim 4
Dependent Claim
26 words
A process according to claim 1 wherein the solution is heated at from 70° to 250° C. whereby the nickel is precipitated in a preliminary reactor.
Claim 5
Dependent Claim
14 words
A process according to claim 3 wherein the preliminary reactor is filled with packing.
Claim 6
Dependent Claim
16 words
A process according to claim 3 wherein the solvent is heated at 80° to 180° C.
Claim 7
Dependent Claim
28 words
A process according to claim 1 wherein an acid gas is added to the solvent as it is heated at a temperature of from 70° to 250° C.
Claim 8
Dependent Claim
13 words
A process according to claim 6 wherein the acid gas is hydrogen sulfide.
Claim 9
Dependent Claim
18 words
A process according to claim 1 wherein the solvent is a lower alcohol, lower ketone, amine or amide.
Claim 10
Dependent Claim
21 words
A process according to claim 8 wherein the solvent is selected from the group consisting of methanol, acetone, N-methylpyrrolidone and dimethylformaiide.
Claim 11
Dependent Claim
74 words
A process for the purification of pressurized gases containing Ni(CO) 4 which consists essentially of contacting said Ni(CO) 4 containing gases with a solvent at a temperature from -60° to 0° C. and thereafter precipitating nickels from the solution by heating the resultant solution at a temperature of from 70° to 250° C. for at least 0.25 hour at a pressure higher than the vapor pressure of the scrubbing liquid and removing the precipitate.
Claim 12
Dependent Claim
74 words
A process for the purification of pressurized gases containing Ni(CO) 4 which consists essentially of contacting said Ni(CO) 4 containing gases with a solvent at a temperature from -60° to 0° C. and thereafter precipitating nickels from the solution by heating the resultant solution at a temperature of from 70° to 250° C. for at least 0.25 hour at a pressure higher than the vapor pressure of the scrubbing liquid and removing the precipitate.
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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |