Home » Volume 32, 2017 » Issue No. 4
High purity dissolving pulp from jute
Jannatun Nayeem, Mamon Sarkar, Ariful Hai Quadery and M.Sarwar Jahan
Pre-hydrolysed kraft pulp from jute was fractionated into short, medium and long fibers to improve the purity and reactivity. Fock reactivity increased with decreasing fiber size, but α–cellulose content in long fiber fraction was higher than that of short fiber fraction. Fractionated jute pulp was alkaline extracted at 25ºC and 90ºC. Alkaline extraction removed pentosan resulting in increased α-cellulose content in the pulp. The purity of the alkaline extracted dissolving pulp increased to 96% for long fiber fraction. Fock’s reactivity also increased after reduction of hemicelluloses by weak alkaline extraction. Refining followed by alkaline extraction did not improve Fock’s reactivity as only alkaline extraction did. Fock’s reactivity of pulp after alkaline extraction at 90ºC was always higher than the pulp alkaline extraction at 25ºC. Formic acid pulping of jute was also carried out. Formic acid treatment followed by alkaline extraction and D0EpD1 bleaching produced pulp of 94.3% purity with Fock’s reactivity of 63.2%. Alkaline extraction of the bleached pulp increased purity to 97% with Fock’s reactivity of 72-73%.
α-cellulose, Dissolving pulp, Fiber fractionation, Fock reactivity, Formic acid pulp, Jute
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Nordic Pulp & Paper Research Journal (NPPRJ) is an international scientific magazine covering science and technology for the areas of wood or bio-mass constituents, pulp and paper and including new fiber-based materials, recovery and by-products from pulping processes, bio-refining and energy issues. Articles meeting required scientific standards are accepted from any continent.
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ISSN: 0283-2631