US2876066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of metallic cyanides
Assignee: EIDP Inc
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Filing: 1955-10-17
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Granted: 1959-03-03
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Byron N Inman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:33
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/08; C01C3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
THE CYCLIC PROCESS FOR PRODUCING AN ALKALI METAL CYANIDE BY THE NEUTRALIZATION OF AN AQUEOUS ALKAI METAL HYDROXIDE WITH HYDROGEN CYANIDE COMPRISING QUICKLY INTERMIXING A CONTINOUS STREAM OF HYDROGEN CYANIDE GAS WITH A CONTINUOUS STREAM OF AN AQUEOUS SOLUTION CONTAINING A MAJOR PORTION OD DISSOLVED ALKALI METAL CYANIDE AND A MINOR PORTION OF DISSOLVED ALKALI METAL HYDROXIDE, SAID HYDROGEN CYANIDE BEING INTERMIXED AT A RATE SUCH THAT THE HEAT OF NEUTRALIZATION WILL NOT INCREASE THE TEMPERATURE OF SAID AQUEOUS SOLUTION ABOVE ABOUT 50*C. AND THE AMOUNT OF DISSOLVED ALKAI METAL HYDROXIDE WILL BE IN EXCESS BY AT LEAST ABOUT 0.2% BY WEIGHT OF THAT REQUIRED FOR THE NEUTRALIZATION OF SAID ADMIXED HYDROGEN CYANIDE, THEREAFTER COOLING SAID SLITION TO ABOUT 35 TO 40*C. AND DIVIDING SID COOLED SOLUTION INTO TWO UNEQUAL PARTS, REMOVING THE SMALLER OF SIAD PARTS FOR SEPARATION AND RECOVERY OF THE ALKAI METAL CYANIDE PRODUCT AND ADDING ALKALI METAL HYDROXIDE TO THE LARGER PART OF SAID COOLED SOLUTION TO RECONSTITUTE SAID AQUEOUS SOLUTION CONTAINING A MAJOR PORTION OF DISSOLVED ALKALI METAL CYANIDE AND A MINOR PORTION OF DISSOLVED ALKALI METAL HYDROXIDE AND RECYCLING SAID RECONSTITUTED SOLUTION FOR QUICK INTERMIXING WITH HYDROGEN CYANIDE GAS AS BEFORE AND REPEATING THE CYCLE.
Claim 2
Dependent Claim
201 words
THE CYCLIC PROCESS FOR PRODUCING AN ALKALI METAL CYANIDE BY THE NEUTRALIZATION OF AN AQUEOUS ALKAI METAL HYDROXIDE WITH HYDROGEN CYANIDE COMPRISING QUICKLY INTERMIXING A CONTINOUS STREAM OF HYDROGEN CYANIDE GAS WITH A CONTINUOUS STREAM OF AN AQUEOUS SOLUTION CONTAINING A MAJOR PORTION OD DISSOLVED ALKALI METAL CYANIDE AND A MINOR PORTION OF DISSOLVED ALKALI METAL HYDROXIDE, SAID HYDROGEN CYANIDE BEING INTERMIXED AT A RATE SUCH THAT THE HEAT OF NEUTRALIZATION WILL NOT INCREASE THE TEMPERATURE OF SAID AQUEOUS SOLUTION ABOVE ABOUT 50*C. AND THE AMOUNT OF DISSOLVED ALKAI METAL HYDROXIDE WILL BE IN EXCESS BY AT LEAST ABOUT 0.2% BY WEIGHT OF THAT REQUIRED FOR THE NEUTRALIZATION OF SAID ADMIXED HYDROGEN CYANIDE, THEREAFTER COOLING SAID SLITION TO ABOUT 35 TO 40*C. AND DIVIDING SID COOLED SOLUTION INTO TWO UNEQUAL PARTS, REMOVING THE SMALLER OF SIAD PARTS FOR SEPARATION AND RECOVERY OF THE ALKAI METAL CYANIDE PRODUCT AND ADDING ALKALI METAL HYDROXIDE TO THE LARGER PART OF SAID COOLED SOLUTION TO RECONSTITUTE SAID AQUEOUS SOLUTION CONTAINING A MAJOR PORTION OF DISSOLVED ALKALI METAL CYANIDE AND A MINOR PORTION OF DISSOLVED ALKALI METAL HYDROXIDE AND RECYCLING SAID RECONSTITUTED SOLUTION FOR QUICK INTERMIXING WITH HYDROGEN CYANIDE GAS AS BEFORE AND REPEATING THE CYCLE.
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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |