Process for producing cationic lignin amines
Abstract
Abstract The process of this invention involves reacting a lignin with the reaction product of epichlorohydrin and a tertiary amine, preferably in salt form. The tertiary amine is preferably converted to salt form with hydrochloric acid and the pH adjusted to between 7-11, preferably between 9 and 9.5. The tertiary amine salt is reacted with epichlorohydrin for about 1 to 6 hours at a temperature below 90* C., preferably below 55*C. The pH of the reaction is slowly raised to around 11 while allowing the reaction to go to completion. From 2 to 10 moles (per 1,000 grams of lignin) of the tertiary amine-epichlorohydrin intermediate are reacted with lignin at a temperature below 90* C., preferably 50* C. for from 1 to 24 hours to forms cationic lignin amines that are water-soluble.
Inventors
- 👤 S Falkehag
- 👤 P Dilling
Bibliographic Details
Claims Analysis
Total Claims: 3References 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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |