NORDIC PULP & PAPER RESEARCH JOURNAL
Home » Volume 32, 2017 » Issue No. 4
BIOREFINERY
High purity dissolving pulp from jute
Jannatun Nayeem, Mamon Sarkar, Ariful Hai Quadery and M.Sarwar Jahan
Abstract
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%.
Keywords
α-cellulose, Dissolving pulp, Fiber fractionation, Fock reactivity, Formic acid pulp, Jute
Pages
623-629
DOI
10.3183/NPPRJ-2017-32-04-p623-629
Price
22 EUR (excl. VAT) Buy PDF
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.
Open Access: Articles not available through Gold Open Access may be purchased by credit card as a pdf file, to be downloaded within 24 h after ordering, at a price of 22 EUR per article. (Value added tax may apply depending on your location, which you enter at payment logout.) Such articles have Green Open Access, i.e. authors may share articles on their personal non-commerical homepage immediately after publication on the website and download them to non-commercial hosting platforms one year after publication in a full issue of NPPRJ.
ISSN: 0283-2631