Removal of wax and stickies from OCC by flotation. Progress report No. 3, July 1--September 30, 1998

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In this quarter we completed low consistency laboratory pulping trials. Pulping results were analyzed in terms of defibering index or yield and the concentration of free wax. The objective of these trials is to identify pulping conditions that will give higher yield and higher concentration of free wax. The yields from low consistency pulping trials ranged from 90 to 99% based on 6-cut laboratory screen rejects. In general, high temperatures (140-150{degree}F) and high pH (9.5-10) conditions resulted in higher yield and the generation of free wax. Factors such as rotor speed and the gap (between the rotor and grate) were ... continued below

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18 pages

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Doshi, M.R.; Dyer, J.; Heise, O. & Cao, B. November 1, 1998.

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Description

In this quarter we completed low consistency laboratory pulping trials. Pulping results were analyzed in terms of defibering index or yield and the concentration of free wax. The objective of these trials is to identify pulping conditions that will give higher yield and higher concentration of free wax. The yields from low consistency pulping trials ranged from 90 to 99% based on 6-cut laboratory screen rejects. In general, high temperatures (140-150{degree}F) and high pH (9.5-10) conditions resulted in higher yield and the generation of free wax. Factors such as rotor speed and the gap (between the rotor and grate) were not significant in affecting defibering. Generally, the turbidities of filtrates from wax-contaminated pulps increased with increase in temperature and/or pH. The filtrate turbidity indicated the relative concentration of finely dispersed wax that could be removed from pulp dewatered on a 30 {micro}m filter paper. Preliminary experiments were conducted to study flotation conditions necessary for effective removal of wax from pulp. Factors which are important for effective flotation include flotation time, volume of air, surfactant concentration and type, and low temperature. Future plans include additional flotation trials to better optimize conditions. Other contaminant types include pressure sensitive adhesives and hot melts will also be examined. This will be followed by pilot plant and mill trials.

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18 pages

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OSTI as DE00672205

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  • Other Information: Supercedes report DE99000197

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  • Other: DE99000197
  • Report No.: DOE/ID/13563--T2
  • Report No.: ON: DE99000197
  • Grant Number: FC07-97ID13563
  • DOI: 10.2172/672205 | External Link
  • Office of Scientific & Technical Information Report Number: 672205
  • Archival Resource Key: ark:/67531/metadc706192

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  • November 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 15, 2015, 5:34 p.m.

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Doshi, M.R.; Dyer, J.; Heise, O. & Cao, B. Removal of wax and stickies from OCC by flotation. Progress report No. 3, July 1--September 30, 1998, report, November 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc706192/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.