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US3607990A
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Process for the manufacture of pentaerythritol phosphite heptanoate
Assignee: Stauffer Chemical Co
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Filing: 1967-11-22
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Granted: 1971-09-21
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Expires: 1987-11-22
Abstract
Abstract A process for manufacturing pentaerythritol phosphite heptanoate which comprises the step of reacting triphenyl phosphite with pentaerythritol to form an impure pentaerythritol phosphite intermediate. The impure pentaerythritol phosphite intermediate is then reacted with phenylheptanoate to form a crude pentaerythritol phosphite heptanoate in commercial yields. The end product can optionally be flash distilled to remove the impurities. The product of this process is known to be useful as a plasticizer for vinyl chloride and the like, and as an additive to lubricating oil base stocks to increase wear resistance.
Inventors
- 👤 Silvio L Giolito
- 👤 Walter Stamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:09
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/6574; C07F9/65746
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
The process as set forth in claim 1, wherein phenol is removed by distillation simultaneously with the reaction of step (a).
Claim 2
Dependent Claim
19 words
The process as set forth in claim 1, wherein phenol is removed simultaneously with the reaction of step (b).
Claim 3
Dependent Claim
27 words
The process as set forth in claim 1, wherein the temperature of purifying the product of step (b) is maintained between about 213 and about 222* C.
Claim 4
Dependent Claim
45 words
In a process for producing pentaerythritol phosphite heptanoate by reacting pentaerythritol with triphenyl phosphate to yield an intermediate, purifying the intermediate by distillation and subsequently reacting the intermediate with phenyl heptanoate the improvement comprising reacting the intermediate directly with the phenyl heptanoate prior to distillation.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |