DISSOLVING PULP PRODUCTION FROM BAMBOO

Larisse Aparecida Ribas Batalha, Jorge Luiz Colodette, José L. Gomide, Luiz C. A. Barbosa, Célia R. A. Maltha, Fernando José Borges Gomes

Abstract


Commercial bamboo chips were evaluated as raw material for dissolving pulp production. The chips were auto-hydrolyzed (AH) and subsequently cooked by the NaOH/AQ process and bleached to full brightness with the O-CCE-D-(EP)-D-P sequence. The term CCE designates a cold caustic extraction stage. The bamboo chip chemistry (22.4% lignin, 19.5% xylans, 49.3% cellulose, 16.8% total extractives, and 1.5% ash) was apparently unfavorable; however high quality dissolving pulp was produced using the aforementioned technologies, even when compared to results obtained with traditional eucalypt commercial wood chips. The pulp showed high brightness (92.4 % ISO) and α-cellulose content (94.9%). Its contents of hemicelluloses, extractives and ash were within acceptable levels for a dissolving pulp aimed at viscose rayon production. Thus, the bamboo chip furnish investigated can be regarded as a viable raw material for dissolving pulp production.

Keywords


Bamboo; Dissolving pulp; Auto-hydrolysis; Cold caustic extraction

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