Patent US3560575A successfully refreshed from Google Patents.
US3560575A
Expired / Lapsed
US
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Preparation of nitroalcohol
Assignee: Commercial Solvents Corp
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Filing: 1966-09-07
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Granted: 1971-02-02
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Expires: 1986-09-07
Abstract
Abstract NITROALCOHOLS ARE PRODUCED BY REACTING A NITROPARAFFIN WITH A STOICHIOMETRIC EXCESS OF FORMALDEHYDE, SAID EXCESS BEING FROM ABOUT 5 TO 60% EQUIVALENTS, DEIONIZING THE REACTION PRODUCT THEREOF TO REMOVE THE METAL ION OF SAID CATALYST FRACTIONATING SAID DEIONIZED REACTION PRODUCT WITH METHANOL IN THE PRESENCE OF A MINERAL ACID, TOLUENE SULFONIC ACID OR CATION EXCHANGE RESIN IN AN AMOUNT SUFFICIENT TO CATALYZE THE REACTION OF THE EXCESS OF THE FORMALDEHYDE AND METHANOL, THE METHANOL BEING USED IN AN AMOUNT SUFFICIENT TO REACT WITH THE ALDEHYDE REMAINING IN SAID FRACTIONATED PRODUCT, AND REMOVING THE REACTION PRODUCT OF SAID FORMALDEHYDE AND METHANOL FROM THE RESULTING MIXTURE.
Inventors
- 👤 John B Tindall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:22
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/12
Claims Analysis
Total Claims: 0
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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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |