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Article: Influence of organic additives on calcium carbonate precipitation during kraft pulping.(Pulping)
- Article from:
- Solutions - for People, Processes and Paper
- Article date:
- October 1, 2002
- Author:
CopyrightCOPYRIGHT 2002 Paper Industry Management Association. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Application: This study identifies antiscalant chemicals that are effective for controlling calcium carbonate scale problems in kraft process liquors.
In this study, calcium was monitored during laboratory batch cooks to evaluate the influence of various organic additives on the precipitation of calcium carbonate during kraft pulping. Included in the study were antiscalant chemicals thought to be capable of with standing the harsh environment of kraft pulping and recovery operations. Results indicate significant differences in the way the tested chemicals inhibit calcium precipitation and their efficacy. For EDTA--an aminocarboxylic acid used to examine the ...
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Article: Phosphonates as additives in kraft pulping--a ...
Solutions - for People, Processes and Paper;
November 1, 2002 ;
634 words
... ... yield, shorter cooking times and better bleaching response. We investigated the performance of phosphonates as additives in kraft pulping of aspen using hydroxyethylidene diphosphonic acid (HEDP) and diethylenetriamine pentamethylenephosphonic acid (DTMPA ...
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