A Survey of Mills Using Caustic-Saving Extraction Stage Chemistry, 2005 Engineering, Pulping & Environmental Conference

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The Papricycle® Process (1) was developed by Paprican and proven through many installations in their member company mills between 1987 and 1991. This patented process, designated as the “PC” stage in this paper, saves caustic by utilizing the alkali value of the sodium carbonate present in first extraction stage effluent. The pulp from the first stage (chlorination or D0 stage) is mixed with the extraction stage effluent and then washed. The washed pulp continues to the E-stage tower but requires less alkali than before to achieve the same pH target.

Author: Bucher, W., Berry, R.M., Wearing, J.T.
A Survey of Mills Using Caustic-Saving Extraction Stage Chem
A Survey of Mills Using Caustic-Saving Extraction Stage Chemistry, 2005 Engineering, Pulping & Environmental Conference
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