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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 1999.6
- 수록면
- 25 - 33 (9page)
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초록· 키워드
오류제보하기
Investigations were carried out recently in three Canadian newsprint mills where a cationic dual polymer retention chemistry was in use for years. Several enhancer/PEO combinations were evaluated on bench scale to determine any possibility for replacing the existing retention system for reduced chemical cost and improved machine operating efficiency.
The PEO with 10 million molecular weight was more effective than that of 7 million molecular weight. New enhancers produced from bisphenol-S, especially Pulfix BL, were much superior to the traditional phenol-formaldehyde
resin in promoting PEO retention performance. The effect of
stock aging on retention appeared to be stock dependent. The 110c induced by the new enhancer/PEO system was somewhat more susceptible to redispersion through hydraulic shear than that from cationic coagulant/cationic polyacrylamide (PAA) flocculant systems but this should be considered to be benefIcial to sheet formation. The non-ionic retention chemistry improved stock drainage more than BASF's Polyrnin SK/cationic emulsifIed PAA even at much lower dosage levels, as determined with a Vertical Sludge Press. The new enhancer/PEO combination was proved once again to be excellent for pitch removal and was considerably better than that of two cationic dual polymer systems studied.
The PEO with 10 million molecular weight was more effective than that of 7 million molecular weight. New enhancers produced from bisphenol-S, especially Pulfix BL, were much superior to the traditional phenol-formaldehyde
resin in promoting PEO retention performance. The effect of
stock aging on retention appeared to be stock dependent. The 110c induced by the new enhancer/PEO system was somewhat more susceptible to redispersion through hydraulic shear than that from cationic coagulant/cationic polyacrylamide (PAA) flocculant systems but this should be considered to be benefIcial to sheet formation. The non-ionic retention chemistry improved stock drainage more than BASF's Polyrnin SK/cationic emulsifIed PAA even at much lower dosage levels, as determined with a Vertical Sludge Press. The new enhancer/PEO combination was proved once again to be excellent for pitch removal and was considerably better than that of two cationic dual polymer systems studied.
목차
Abstract
INTRODUCTION
EXPERIMENTAL
RESULTS AND DISCUSSION
CONCLUSIONS
ACKNOWLEDGEMENTS
REFERENCES
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