US3197273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the continuous production of cyanogen chloride
Assignee: Novartis Corp
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Filing: 1961-07-31
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Granted: 1965-07-27
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Expires: 1981-07-31
Abstract
No abstract record available.
Inventors
- 👤 Trickey Elwood Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:07
CPC Classifications
C; C01; C01C; C01C3/00; C01C3/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
AN IMPROVED AND SIMPLIFIED PROCESS FOR THE CONTINUOUS PRODUCTION IN A ONE-COLUMN CLOSED SYSTEM OF CYANOGEN CHLORIDE IN HIGH YIELDS AND OF GREAT PURITY ADAPTED FOR IMMEDIATE CONVERSION TO CYANURIC CHLORIDE WHICH COMPRISES (A) CHARGING CHLORINE AND HYDROGEN CYANIDE TO A REACTION SECTION IN THE MIDDLE PORTION OF SAID COLUMN, THE CHLORINE BEING IN EXCESS BY ABOUT 5% AND THE HYDROGEN CYANIDE BEING INTRODUCED TO SAYD REACTION SECTION SUPERIORLY TO THE CHLORINE, (B) FEEDING WATER TO A PURIFICATION SECTION IN THE UPPER PORTION OF SAID COLUMN IN ORDER TO REMOVE HYDROGEN CYANIDE AND HYDROGEN CHLORIDE FROM THE PRODUCT GAS STREAM WHICH PASSES THERETHROUGH, (C) PASSING STEAM INTO A STRIPPING SECTION AT THE BASE OF AID COLUMN IN ORDER TO REMOVE HYDROGEN CYANIDE AND CYANOGEN CHLORIDE DISSOLVED IN THE DILUTE HYDROGEN CHLORIDE FORMED, (D) ADJUSTING AND THEN UNIFORMLY MAINTAINING THE RATE OF INPUT OF HYDROGEN CYANIDE AND CHLORINE AND THE RATE OF STEAM AND WATER FLOW SO THAT THE FORMATION OF CYANOGEN CHLORIDE TAKES PLACE PREDOMINANTLY IN A REACTION ZONE LOCATED IN THE MIDDLE PORTION OF SAID REACTION SECTION AND (E) RECOVERING CYANOGEN CHLORIDE ADMIXED WITH ABOUT 5% OF CHLORINE FROM THE TOP OF SAID COLUMN; THE TEMPERATURE IN SAID COLUMN DECREASING FROM 102110*C. AT THE BOTTOM TO 15-20*C. AT THE TOP.
Claim 2
Dependent Claim
211 words
AN IMPROVED AND SIMPLIFIED PROCESS FOR THE CONTINUOUS PRODUCTION IN A ONE-COLUMN CLOSED SYSTEM OF CYANOGEN CHLORIDE IN HIGH YIELDS AND OF GREAT PURITY ADAPTED FOR IMMEDIATE CONVERSION TO CYANURIC CHLORIDE WHICH COMPRISES (A) CHARGING CHLORINE AND HYDROGEN CYANIDE TO A REACTION SECTION IN THE MIDDLE PORTION OF SAID COLUMN, THE CHLORINE BEING IN EXCESS BY ABOUT 5% AND THE HYDROGEN CYANIDE BEING INTRODUCED TO SAYD REACTION SECTION SUPERIORLY TO THE CHLORINE, (B) FEEDING WATER TO A PURIFICATION SECTION IN THE UPPER PORTION OF SAID COLUMN IN ORDER TO REMOVE HYDROGEN CYANIDE AND HYDROGEN CHLORIDE FROM THE PRODUCT GAS STREAM WHICH PASSES THERETHROUGH, (C) PASSING STEAM INTO A STRIPPING SECTION AT THE BASE OF AID COLUMN IN ORDER TO REMOVE HYDROGEN CYANIDE AND CYANOGEN CHLORIDE DISSOLVED IN THE DILUTE HYDROGEN CHLORIDE FORMED, (D) ADJUSTING AND THEN UNIFORMLY MAINTAINING THE RATE OF INPUT OF HYDROGEN CYANIDE AND CHLORINE AND THE RATE OF STEAM AND WATER FLOW SO THAT THE FORMATION OF CYANOGEN CHLORIDE TAKES PLACE PREDOMINANTLY IN A REACTION ZONE LOCATED IN THE MIDDLE PORTION OF SAID REACTION SECTION AND (E) RECOVERING CYANOGEN CHLORIDE ADMIXED WITH ABOUT 5% OF CHLORINE FROM THE TOP OF SAID COLUMN; THE TEMPERATURE IN SAID COLUMN DECREASING FROM 102110*C. AT THE BOTTOM TO 15-20*C. AT THE TOP.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |