US2864847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of dialkyl hydrogen phosphites
Assignee: Virginia Carolina Chemical Corp
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Filing: 1953-09-14
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Granted: 1958-12-16
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Expires: 1973-09-14
Abstract
No abstract record available.
Inventors
- 👤 Mangham Jesse Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:46
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/141; C07F9/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
PROCESS FOR THE PRODUCTION OF DI-LOWER-ALKYL HYDROGEN PHOSPHITE WHICH COMPRISES GRADUALLY INTRODUCING PHOSPHORUS TRICHLORIDE INTO A REACTION ZONE CONTAINING AT LEAST THREE MOLECULES OF AN ALCOHOL FOR EACH MOLECULE OF PHOSPHORUS TRICHLORIDE INTRODUCED, MIXING THE ALCOHOL AND PHOSPHORUS TRICHLORIDE, MAINTAINING THE MIXTURE AT A TEMPERATURE WITHIN THE RANGE FROM -20* TO 50*C. AND INTRODUCING AMMONIA INTO THE MIXTURE SIMULTANEOUSLY WITH THE INTRODUCTION OF PHOSPHORUS TRICHLORIDE TO COMBINE WITH HYUDROCHLORIC ACID AS IT IS FORMED AND MAINTAIN THE REACTION MIXTURE DURING THE INTRODUCTION OF THE PHOSPHORUS TRICHLORIDE WITHIN THE PH RANGE FROM 3.5 TO 8.5, THE TOTAL QUANTITY OF AMMONIA INTRODUCED INTO THE MIXTURE BEING SUFFICIENT TO GIVE AN END REACTION MIXTURE HAVING A PH WITHIN THE RANGE FROM JUST ACID TO METHYL RED TO 7.
Claim 2
Dependent Claim
125 words
PROCESS FOR THE PRODUCTION OF DI-LOWER-ALKYL HYDROGEN PHOSPHITE WHICH COMPRISES GRADUALLY INTRODUCING PHOSPHORUS TRICHLORIDE INTO A REACTION ZONE CONTAINING AT LEAST THREE MOLECULES OF AN ALCOHOL FOR EACH MOLECULE OF PHOSPHORUS TRICHLORIDE INTRODUCED, MIXING THE ALCOHOL AND PHOSPHORUS TRICHLORIDE, MAINTAINING THE MIXTURE AT A TEMPERATURE WITHIN THE RANGE FROM -20* TO 50*C. AND INTRODUCING AMMONIA INTO THE MIXTURE SIMULTANEOUSLY WITH THE INTRODUCTION OF PHOSPHORUS TRICHLORIDE TO COMBINE WITH HYUDROCHLORIC ACID AS IT IS FORMED AND MAINTAIN THE REACTION MIXTURE DURING THE INTRODUCTION OF THE PHOSPHORUS TRICHLORIDE WITHIN THE PH RANGE FROM 3.5 TO 8.5, THE TOTAL QUANTITY OF AMMONIA INTRODUCED INTO THE MIXTURE BEING SUFFICIENT TO GIVE AN END REACTION MIXTURE HAVING A PH WITHIN THE RANGE FROM JUST ACID TO METHYL RED TO 7.
References Cited (Backward Citations)
US2570512A
Cited
US2678940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |