Patent US3939228A successfully refreshed from Google Patents.
US3939228A
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Process for producing phosphazene compound
Assignee: Ethyl Corp
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Filing: 1973-04-04
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Granted: 1976-02-17
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Expires: 1993-04-04
Abstract
Abstract A process for manufacture of phosphazene compounds in a liquid aliphatic hydrocarbon reaction medium providing process advantages by reacting therein an alkali metal alkoxide, phenoxide or thiol derivative with a phosphonitrilic halide.
Inventors
- 👤 James T. F. Kao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:10
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6581; C07F9/65812; D; D06; D06M; D06M13/00; D06M13/244; D06M13/282
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
55 words
A process for the manufacture of phosphazene compounds consisting essentially of reacting alkali metal alkoxide having from 1 to about 6 carbon atoms or alkali metal phenoxide with a phosphonitrilic halide at from about 70° to about 150°C in a reaction medium consisting essentially of a liquid paraffinic hydrocarbon and an inert chloroaromatic hydrocarbon solvent.
Claim 2
Dependent Claim
55 words
A process for the manufacture of phosphazene compounds consisting essentially of reacting alkali metal alkoxide having from 1 to about 6 carbon atoms or alkali metal phenoxide with a phosphonitrilic halide at from about 70° to about 150°C in a reaction medium consisting essentially of a liquid paraffinic hydrocarbon and an inert chloroaromatic hydrocarbon solvent.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said paraffinic hydrocarbon is a paraffinic hydrocarbon having from about 6 to about 9 carbon atoms.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein said paraffinic hydrocarbon is a paraffinic hydrocarbon boiling within the range of from about 70° to about 150°C.
Claim 5
Dependent Claim
24 words
The process of claim 1 wherein said paraffinic hydrocarbon is a paraffinic hydrocarbon boiling within the range of from about 90° to about 130°C.
Claim 6
Dependent Claim
20 words
The process of claim 1 wherein said paraffinic hydrocarbon is heptane or octane or a mixture of heptane and octane.
Claim 7
Dependent Claim
12 words
The process of claim 1 wherein said chloroaromatic hydrocarbon solvent is chlorobenzene.
Claim 8
Dependent Claim
70 words
A process for the manufacture of phosphazene compounds consisting essentially of reacting an alkali metal alkoxide having from 1 to about 6 carbon atoms or alkali metal phenoxide with a phosphonitrilic halide at from about 70° to about 150°C, said process being further characterized by providing said alkali metal alkoxide or phenoxide in a liquid aliphatic hydrocarbon reaction medium and providing said phosphonitrilic halide in an aromatic halohydrocarbon reaction medium.
Claim 9
Dependent Claim
70 words
A process for the manufacture of phosphazene compounds consisting essentially of reacting an alkali metal alkoxide having from 1 to about 6 carbon atoms or alkali metal phenoxide with a phosphonitrilic halide at from about 70° to about 150°C, said process being further characterized by providing said alkali metal alkoxide or phenoxide in a liquid aliphatic hydrocarbon reaction medium and providing said phosphonitrilic halide in an aromatic halohydrocarbon reaction medium.
Claim 10
Dependent Claim
147 words
A process for the manufacture of phosphazene compounds which consists essentially of: a. forming a slurry of an alkali metal alkoxide or phenoxide by reacting an alkali metal with an alcohol having from 1 to about 6 carbon atoms or phenol in a liquid paraffinic hydrocarbon reaction medium; b. forming a solution of a phosphonitrilic halide in an inert liquid chloroaromatic hydrocarbon solvent; c. intermixing said slurry and said solution at from about 70° to about 150°C whereby a phosphazene product and alkali metal halide by-product are formed in the reaction mixture which comprises the liquid paraffinic hydrocarbon and the inert liquid chloroaromatic hydrocarbon solvent; d. separating the alkali metal halide by-product from the reaction mixture; e. separating the reaction mixture from the phosphazene; and f. separating the reaction mixture into liquid paraffinic hydrocarbon for recycle to (a) and inert liquid chloroaromatic solvent for recycle to (b).
Claim 11
Dependent Claim
147 words
A process for the manufacture of phosphazene compounds which consists essentially of: a. forming a slurry of an alkali metal alkoxide or phenoxide by reacting an alkali metal with an alcohol having from 1 to about 6 carbon atoms or phenol in a liquid paraffinic hydrocarbon reaction medium; b. forming a solution of a phosphonitrilic halide in an inert liquid chloroaromatic hydrocarbon solvent; c. intermixing said slurry and said solution at from about 70° to about 150°C whereby a phosphazene product and alkali metal halide by-product are formed in the reaction mixture which comprises the liquid paraffinic hydrocarbon and the inert liquid chloroaromatic hydrocarbon solvent; d. separating the alkali metal halide by-product from the reaction mixture; e. separating the reaction mixture from the phosphazene; and f. separating the reaction mixture into liquid paraffinic hydrocarbon for recycle to (a) and inert liquid chloroaromatic solvent for recycle to (b).
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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |