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Effect of eucalypt pulp extractives on the retention performance of polyethylene oxide and phenolformaldehyde resin


, : Effect of eucalypt pulp extractives on the retention performance of polyethylene oxide and phenolformaldehyde resin. Appita Journal 45(3): 189-192

Variations in the polyphenolic content pH and ionic strength of pulp have been found to affect the retention performance of the dual retention aid system of polyethylene oxide (PEO) and phenolformaldehyde resin (PFR). Polyphenolics from unbleached eucalypt pulp interfere with the mechanism by which the polymers improve fibre retention.

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Related references

Stack K.R.; Dunn L.A.; Roberts N.K., 1990: Retention of pulp using polyethyleneoxide and phenolformaldehyde resin. The interaction between polyethyleneoxide (PEO) and phenolformaldehyde resin (PFR), both in the presence and absence of pulp, has been investigated using various techniques such as retention and drainage measurements; absorbance measurements; FTIR...

Stack, K.; Dunn, L.; Roberts, N., 1993: Evaluation of various phenolformaldehyde resins in the phenolformaldehyde resin--polyethyleneoxide dual retention aid system. Retention performance of the polyethylene oxide (PEO)-phenolformaldehyde resin (PFR) retention aid system is affected by the chemical structure and the molecular weight distribution of PFR. 13C NMR and high performance liquid chromatography have b...

Inverardi, R., 1966: The influence of extractives on the colour of Eucalypt pulp. cf. F.A. 27 No. 5031.] Describes methods of studying this phenomenon, which appears to be connected with the presence of polyphenols. A quantitative method of measuring the individual components in the mixture of extractives is described.

Nelson, P.F.; Smith, J..; Young, W.D., 1970: The influence of extractives on some properties of Eucalypt kraft pulp. To determine the advantages of removing extractives from overmature Eucalypt woods before rather than during pulping, woods of high extractive content were extracted with fresh water in stages of 4-24 hr., the extraction temperature increasing sta...

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Gutierrez, A.R.mero, J.R.o, J.-Del, 2001: Lipophilic extractives in process waters during manufacturing of toally chlorine free kraft pulp from eucalypt wood. Chemosphere 44(5): 1237-1242

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