- Patent Number:
4,455,257
- Appl. No:
06/433,991
- Application Filed:
October 12, 1982
- نبذة مختصرة :
Cationic reaction products having improved flocculating performance for suspended solids are obtained by the reaction of kraft lignin with aldehydes and polyamines.
- Inventors:
Hoftiezer, Henry W. (Rothschild, WI); Watts, Daniel J. (Kingston, NJ); Takahashi, Akio (Solebury, PA)
- Assignees:
Reed Lignin, Inc. (Greenwich, CT)
- Claim:
What is claimed is
- Claim:
1. Cationic lignin derivative consisting essentially of the reaction product of kraft lignin which is substantially free from sulfonic acid groups with an aldehyde or an aldehyde-producing substance, and a polyamine.
- Claim:
2. Cationic lignin derivative as in claim 1 wherein said polyamine contains at least two amino groups, at least one of which is primary or secondary amino group.
- Claim:
3. Cationic lignin derivative as in claim 1 wherein said polyamine is polyalkyleneamine.
- Claim:
4. Cationic lignin derivative as in claim 1 wherein said polyamine is a cyclic polyamine.
- Claim:
5. Cationic lignin derivative as in claim 3 wherein said polyalkyleneamine is selected from the group consisting of ethylenediamine and linear and branched homologues of ethylenediamine, wherein said homologues contain at least one additional CH.sub.2 CH.sub.2 N moiety.
- Claim:
6. Cationic lignin derivative as in claim 1, wherein said aldehyde is formaldehyde.
- Claim:
7. Cationic lignin derivative as in claim 2 wherein said aldehyde is formaldehyde.
- Claim:
8. Cationic lignin derivative as in claim 3 wherein said aldehyde is formaldehyde.
- Claim:
9. Cationic lignin derivative as in claim 4 wherein said aldehyde is formaldehyde.
- Claim:
10. Cationic lignin derivative as in claim 5 wherein said aldehyde is formaldehyde.
- Claim:
11. Cationic lignin derivative as in claims 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 wherein the ratio to said lignin to said polyamine is from about 1:2 to about 1:0.1.
- Claim:
12. A process for making a cationic lignin derivative which comprises reaction kraft lignin which is substantially free from sulfonic acid groups with an aldehyde or an aldehyde-producing substance, and a polyamine.
- Current U.S. Class:
260/124R
- Current International Class:
C07G 100
- Patent References Cited:
2709696 May 1955 Wiest
3126350 March 1964 Borgfeldt
3784493 January 1974 Giguere et al.
4017419 April 1977 Ludwig et al.
- Primary Examiner:
Phillips, Delbert R.
- الرقم المعرف:
edspgr.04455257
Processing Request
No Comments.