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
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-03 13:22
CPC Classifications
C; C08; C08L; C08L95/00; C08L95/005
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
98 words
A process for producing water-soluble, cationic lignin amines which comprises reacting at a beginning pH between 7 and 11 and a temperature below 90* C. in approximately equimolar amount epichlorohydrin and a tertiary amine having the general formula: wherein at least two of R1, R2 and R3 are methyl groups and the remaining R contains no more than 18 carbon atoms reacting to form an intermediate and reacting said intermediate with lignin from 2 to 10 moles of the intermediate per 1,000 grams of lignin at a temperature below 90* C. for from 1 hour to 24 hours.
Claim 2
Dependent Claim
18 words
The process of claim 2 wherein the tertiary amine is trimethylamine and the lignin is kraft pine lignin.
Claim 3
Dependent Claim
21 words
The process of claim 3 wherein the trimethylamine and epichlorohydrin are reacted in equimolar amounts at a temperature below 55* C.