Optimizing Alkaline Extraction for Eucalyptus Kraft Pulp Bleaching
Source abstract
Abstract
This paper evaluates different approaches for the (E*) stage of the DHT(E*)D sequence for eucalyp-tus kraft pulp bleaching to 90%–91% ISO brightness, considering kappa factors 0.12, 0.16, and 0.20 in the first stage. These (E*) approaches included E, (EO), (EP), (EOP), (PO), PHT, O, and (O/O) stages run at two tempera-tures. Results were compared on the basis of total active chlorine demand, chemical cost, pulp brightness stability and viscosity, and effluent load. We concluded that a DHT kappa factor of 0.12 and a (PO) stage run at 85°C–95°C appeared to be the most attractive approach for bleaching eucalyptus pulp with the DHT(E*)D sequence, consider-ing cost-effectiveness, pulp quality, and effluent load; however, when the steam cost is taken into consideration, the cost advantage was lost.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Lignin and Wood Chemistry · Wood Treatment and Properties · Botanical Research and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (18)
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