Patent US4311652A successfully refreshed from Google Patents.
US4311652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arbuzov reactions employing an aliphatic solvent
Assignee: Akzo America Inc
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Filing: 1980-05-28
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Granted: 1982-01-19
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Expires: 2000-05-28
Abstract
Abstract An improved process for phosphite rearrangement wherein the phosphite is rearranged to the phosphonate. The improvement comprises conducting the phosphite rearrangement reaction in an aliphatic solvent which is miscible with the reactants at reaction temperatures, and immiscible with the product at lower temperatures. Increased yields of the phosphonate product are obtained without the need for additional distillation for solvent separation.
Inventors
- 👤 Alan Abramson
- 👤 Edward D. Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:07
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4015; C07F9/4071; C07F9/4075
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
43 words
A novel process for the rearrangement of a phosphite to the phosphonate product comprising conducting the rearrangement process in an essentially aliphatic solvent which is miscible with the reactants at the reaction temperature, but substantially immiscible with the phosphonate product at lower temperatures.
Claim 2
Dependent Claim
43 words
A novel process for the rearrangement of a phosphite to the phosphonate product comprising conducting the rearrangement process in an essentially aliphatic solvent which is miscible with the reactants at the reaction temperature, but substantially immiscible with the phosphonate product at lower temperatures.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the phosphite is a haloalkyl phosphite.
Claim 4
Dependent Claim
11 words
The process of claim 1 wherein the phosphite is tris(2-chloroethyl) phosphite.
Claim 5
Dependent Claim
11 words
The process of claim 1 wherein the solvent is an alkane.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein the solvent is essentially aliphatic having some aromatic components.
Claim 7
Dependent Claim
23 words
The process of claim 1 wherein the solvent is a mix aliphatic solvent having a boiling temperature within the range of 180°-220° C.
Claim 8
Dependent Claim
10 words
The process of claim 1 wherein the solvent is dodecane.
Claim 9
Dependent Claim
14 words
The process of claim 1 wherein the solvent is a low odor base solvent.
Claim 10
Dependent Claim
13 words
The process of claim 1 wherein the solvent to phosphite ratio is 1:1.
Claim 11
Dependent Claim
15 words
The process of claim 1 wherein the solvent to phosphite ratio is less than 1:1.
Claim 12
Dependent Claim
15 words
The process of claim 1 wherein the solvent to phosphite ratio is greater than 1:1.
Claim 13
Dependent Claim
11 words
The novel process of claim 1 wherein the process is continuous.
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) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |