Patent US3688474A successfully refreshed from Google Patents.
US3688474A
Expired / Lapsed
US
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Collection of metal carbonyls
Assignee: Huntington Alloys Corp
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Filing: 1971-06-22
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Granted: 1972-09-05
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Expires: 1991-06-22
Abstract
Abstract Gaseous streams of carbon monoxide containing nickel and iron carbonyls are contacted with cooled liquid iron pentacarbonyl to dissolve the carbonyls and to provide purified carbon monoxide. When the liquid iron pentacarbonyl has dissolved controlled amounts of nickel carbonyl, the solution is fractionally distilled to recover nickel carbonyl and liquid iron pentacarbonyl which can be recycled. The process can also be conducted under pressure and in conjunction with intermediate pressure carbonyl processes for recovering nickel.
Inventors
- 👤 Michael David Head
- 👤 John Robert Michael Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:16
CPC Classifications
C; C01; C01G; C01G53/00; C01G53/02; C01G49/00; C01G49/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
36 words
The process as described in claim 1 wherein the dissolved nickel carbonyl is recovered from the carbonyl solution by fractional distillation and liquid iron pentacarbonyl is recycled to scrub more nickel carbonyl from the gaseous stream.
Claim 2
Dependent Claim
82 words
A process for separating nickel carbonyl from other gases that are substantially insoluble in liquid iron pentacarbonyl which comprises: contacting a gaseous stream containing nickel carbonyl with liquid iron pentacarbonyl containing less than about 1 percent nickel carbonyl to scrub nickel carbonyl from the gaseous stream and to produce a carbonyl solution of nickel carbonyl dissolved in liquid iron pentacarbonyl, and fractionally distilling substantially pure nickel carbonyl from the carbonyl solution by passing a stream of carbon monoxide through the carbonyl solution.
Claim 3
Dependent Claim
19 words
The process as described in claim 3 wherein the gaseous stream contains nickel carbonyl, iron pentacarbonyl and carbon monoxide.
Claim 4
Dependent Claim
30 words
The process as described in claim 3 wherein the gaseous stream is maintained at a temperature below about 80* C. and at a pressure of more than about 2 psig.
Claim 5
Dependent Claim
31 words
The process as described in claim 5 wherein the liquid iron pentacarbonyl is maintained at a temperature below about 25* C. and at a pressure of more than about 2 psig.
Claim 6
Dependent Claim
21 words
The process as described in claim 6 wherein the liquid iron pentacarbonyl is maintained at a temperature below about 20* C.
Claim 7
Dependent Claim
21 words
The process as described in claim 7 wherein the liquid iron pentacarbonyl is maintained at a temperature below about 5* C.
Claim 8
Dependent Claim
23 words
The process as described in claim 8 wherein the liquid iron pentacarbonyl is maintained at a pressure between about 2 and 150 psig.
Claim 9
Dependent Claim
22 words
The process as described in claim 9 wherein the gaseous stream is maintained at a pressure between about 2 and 150 psig.
Claim 10
Dependent Claim
49 words
The process as described in claim 3 wherein the gaseous stream contains between about 20 grams per cubic meter and 250 grams per cubic meter of nickel as nickel carbonyl and between about 20 grams per cubic meter and 250 grams per cubic meter of iron as iron pentacarbonyl.
Claim 11
Dependent Claim
22 words
The process as described in claim 11 wherein the liquid iron pentacarbonyl is maintainEd at a temperature below about minus 10* C.
Claim 12
Dependent Claim
145 words
The process as described in claim 3 wherein fractional distillation is conducted in a column which contains a solution of carbonyls that is substantially pure liquid nickel carbonyl at the top of the column and substantially pure liquid iron pentacarbonyl at the bottom of the column and is maintained at a temperature range between about 0* C. and 85* C. with the solution at the top of the column being maintained at the lower end of the temperature range and the solution at the bottom of the column being maintained at the upper end of the temperature range and carbon monoxide is introduced at the bottom of the column so that the carbon monoxide and carbonyl vapors are progressively cooled to condense iron pentacarbonyl therefrom and to provide a gaseous stream of carbon monoxide containing substantially pure nickel carbonyl at the top of the column.
References Cited (Backward Citations)
US2985509A
Cited
US3342587A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |