Patent US3656916A successfully refreshed from Google Patents.
US3656916A
Expired / Lapsed
US
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Production of phosphonitrilic chlorides
Assignee: BASF SE
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Filing: 1970-04-08
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Granted: 1972-04-18
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Expires: 1990-04-08
Abstract
Abstract Phosphonitrilic chlorides having the general formula: PNCl2)n where n denotes an integer of at least 3 and which contain a high proportion of trimeric and tetrameric cyclic phosphonitrilic chlorides are prepared by reaction of phosphorus pentachloride with ammonia in an inert solvent. The solution should contain not more than 5 moles of phosphorus pentachloride per liter. Ammonia is introduced at a rate not exceeding 0.12 liter per minute per mole of the phosphorus pentachloride contained in the whole solution until one tenth to one third of the total amount of ammonia required has been introduced.
Inventors
- 👤 Richard Schiedermaier
- 👤 Karl Wintersberger
- 👤 Gerd Wunsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:44
CPC Classifications
C; C01; C01B; C01B21/00; C01B21/082; C01B21/097; C01B21/098; C01B21/0986
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
36 words
A process as claimed in claim 1 wherein the ammonia is passed in at a rate of from 0.04 to 0.08 liter per minute per mole of phosphorus pentachloride containing in the whole of the solution.
Claim 2
Dependent Claim
20 words
A process as claimed in claim 1 wherein the solution contains 1 to 3 moles of phosphorus pentachloride per liter.
Claim 3
Dependent Claim
18 words
A process as claimed in claim 1 carried out at a temperature of from 90* to 120* C.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |