Anionic lipophilic glycerol-based polymers for organic deposition control in papermaking processes
The invention is directed to methods and compositions for reducing the deposition of pitches and stickies in a papermaking process. The method involves introducing an anionic glycerol-based polymer to the papermaking process. This anionic polymer prevents the pitches and stickies from depositing and agglomerating in papermaking processes.
1. A method of reducing the deposition of organic contaminants in papermaking processes, comprising adding to pulp or a papermaking system an effective amount of a composition comprising an anionic lipophilic branched, cyclic glycerol-based polymer, wherein the composition selectively bonds with the organic contaminants to form a complex and the complex is stable in papermaking processes.
2. The method of claim 1 , wherein the glycerol-based polymer is modified with an anionic group selected from the list consisting of phosphates, phosphonates, carboxylates, sulfonates, the like and any combination thereof.
3. The method of claim 1 , wherein the glycerol-based polymer is an anionic lipohydrophilic glycerol based polymer.
4. The method of claim 1 , wherein the glycerol-based polymer is branched, hyperbranched, dendritic, or any combination thereof.
5. The method of claim 1 , wherein the branched, cyclic glycerol-based polymer is cross-linked.
6. The method of claim 1 , wherein the anionic branched, cyclic glycerol-based polymer is a random polymer of the monomeric units including R 1 indicated in the following formula:
wherein:
m, n, o, p, q and r are independently 0 to 700;
R and R′ are independently —(CH 2 ) x —, wherein each x is independently 0 or 1; and
each R 1 is independently selected from hydrogen, acyl, C 1 -C 50 alkyl and anionic groups.
7. The method of claim 6 , wherein each R 1 is independently selected from hydrogen, C 2 -C 18 alkyl, and —C(O)CH(OH)CH 3 .
8. The method of claim 6 , wherein m, n, o, p, q and r are independently selected from 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49 and 50.
9. The method of claim 1 , wherein the glycerol-based polymer has a weight-average molecular weight of about 200 Da to about 500,000 Da.
10. The method of claim 1 , further comprising adding to the pulp or the papermaking system at least one component selected from the group consisting of fixatives, dispersants, and other detackifiers.
11. The method of claim 1 , wherein the organic contaminants are stickies.
12. The method of claim 1 , wherein the organic contaminants are pitch, stickies or combination thereof.
13. The method of claim 1 , wherein the composition is added to a pulp slurry in a pulper, latency chest, reject refiner chest, disk filter or Decker feed or accept, whitewater system, pulp stock storage chest, blend chest, machine chest, headbox, saveall chest, or any combination thereof in the papermaking process.
14. The method of claim 1 , wherein the composition is added to a surface in the papermaking process selected from a pipe wall, a chest wall, a machine wire, a press roll, a felt, a foil, an Uhle box, a dryer, or any combination thereof.
15. The method of claim 1 , wherein the anionic branched, cyclic glycerol-based polymer is added to a pulp slurry in the papermaking process.
16. The method of claim 1 , wherein the effective amount of the anionic branched, cyclic glycerol-based polymer is from about 5 ppm to about 300 ppm.