Claims
- 1. A semi-batch process for making a hydrophobic polyelectrolyte copolymer which comprises the steps of:
- adding diallyldimethylammonium chloride to a polymerization reactor vessel in an amount between about 1 to about 19 weight percent;
- heating the diallyldimethylammonium chloride to a temperature in the range between about 47.degree. C. to about 57.degree. C.;
- adding a polymer initiator dropwise to said diallyldimethylammonium chloride in an amount between about 0.05 to about 0.4 weight percent;
- adding a hydrophobic monomer selected from the group consisting of quaternized dimethyl aminoethylacrylates and quaternized dimethylaminoethylmethacrylates dropwise to said diallyldimethylammonium chloride in an amount between about 3 to about 19 weight percent; and
- heating the mixture of diallyldimethylammonium chloride, polymer initiator and hydrophobic monomer to a temperature in the range between about 47.degree. C. to about 82.degree. C.
- 2. The process according to claim 1 wherein deionized water is added periodically as needed during the polymerization process in an total amount between about 63 to about 80 weight percent.
- 3. The process according to claim 1 wherein said diallyldimethylammonium chloride is mixed with NaCl and deionized water prior to addition to said reactor vessel.
- 4. The process according to claim 3 wherein said diallyldimethylammonium chloride solution has a concentration of diallyldimethylammonium chloride in the range between about 54 to about 59.
- 5. The process according to claim 1 said diallyldimethylammonium chloride, polymer initiator and hydrophobic monomer are heated at a temperature in the range between about 47.degree. C. to about 57.degree. C. for a period of between about 4 to 6 hours.
- 6. The process according to claim 5 further comprising the step of increasing the temperature at which said diallyldimethylammonium chloride, polymer initiator and hydrophobic monomer are heated, said temperature is increased to about 72.degree. C. to about 82.degree. C. for a period of between about 4 to 6 hours.
- 7. The process according to claim 1 wherein said polymer initiator is selected from the group consisting of: 2,2'-azobis(2-amidinopropane) hydrochloride, ammonium persulfate, 2,2'-azobis(N,N'-dimethylene isobutylamide) dihydrochloride, and ammonium persulfate/sodium meta bisulfite.
- 8. A method for removing color from a paper mill waste effluent which comprises the step of adding a hydrophobic polyelectrolyte copolymer to said effluent, said hydrophobic polyelectrolyte copolymer comprising a diallyldimethylammonium chloride and a hydrophobic monomer selected from the group consisting of: quaternized dimethylaminoethylacrylates and quaternized dimethylaminoethylmethacrylates.
- 9. The method according to claim 8 wherein said quaternized dimethylaminoethylacrylate is selected from the group consisting of: dimethylaminoethylacrylate having C.sub.8 to C.sub.20 chloride quaternaries.
- 10. The method according to claim 9 wherein said quaternized dimethylaminoethylacrylate having C.sub.8 to C.sub.20 chloride quaternary is either dimethylaminoethylacrylate benzyl chloride quaternary or dimethylaminoethylacrylate cetyl chloride quaternary.
- 11. The method according to claim 8 wherein said quaternized dimethylaminoethylmethacrylate is selected from the group consisting of: dimethylaminoethylmethacrylate methyl chloride quaternary and dimethylaminoethylmethacrylate having C.sub.8 to C.sub.20 chloride quaternaries.
- 12. The method according to claim 11 wherein said quaternized dimethylaminoethylmethacrylates having C.sub.8 to C.sub.20 chloride quaternary are either dimethylaminoethylmethacrylate benzyl chloride quaternary or dimethylaminoethylmethacrylate cetyl chloride quaternary.
- 13. The method according to claim 8 wherein said diallyldimethylammonium chloride and said hydrophobic monomer are present in a molar ratio in the range from 99:1 to 20:80.
- 14. The method of claim 1 wherein the quaternized dimethylaminoethylacrylate is selected from the group consisting of: dimethylaminoethylacrylate having C.sub.8 to C.sub.20 chloride quaternaries.
- 15. The method according to claim 14 wherein the quaternized dimethylaminoethylacrylate having C.sub.8 to C.sub.20 chloride quaternary is either dimethylaminoethylacrylate benzyl chloride quaternary or dimethylaminoethylacrylate cetyl chloride quaternary.
- 16. The method according to claim 1 wherein the quaternized dimethylaminoethylmethacrylate is selected from the group consisting of: dimethylaminoethylmethacrylate methyl chloride quaternary and dimethylaminoethylmethacrylate having C.sub.8 to C.sub.20 chloride quaternaries.
- 17. The method according to claim 14 wherein said quaternized dimethylaminoethylmethacrylates having C.sub.8 to C.sub.20 chloride quaternary are either dimethylaminoethylmethacrylate benzyl chloride quaternary or dimethylaminoethylmethacrylate cetyl chloride quaternary.
- 18. The method according to claim 1 wherein said diallyldimethylammonium chloride and said hydrophobic monomer are present in a molar ratio in the range from 99:1 to 20:80.
Parent Case Info
This application is a division of application Ser. No. 07/935,550, filed Aug. 26, 1992 now U.S. Pat. No. 5,283,306.
US Referenced Citations (8)
Divisions (1)
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Number |
Date |
Country |
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935550 |
Aug 1992 |
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