Preparation of kraft lignin-based adhesives 1.
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منابع مشابه
Preparation and Characterization of K2CO3-Activated Kraft Lignin Carbon
A series of activated carbons (ACs) were prepared by K2CO3 activation from kraft lignin (KL) that was recovered from papermaking black liquor. The effects of process parameters such as the activation temperature (AT), activated period, K2CO3 to KL mass ratio, and N2 flow rate on the characteristics of the final product were determined. The ACs were characterized using nitrogen adsorption, morph...
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Laboratory-obtained kraft lignins have been studied via elemental analysis (EA), 1H-NMR, FTIR, GPC to analyse the chemical structure. The kraft lignins were subjected to oxidation with H2O2 using Co(salen) as a biomimetic catalyst at mild condition (80oC, 240 min). The kraft lignins isolated from eucalyptus (EKL) and bamboo (BKL) had a low hydroxyl (oxygen) contents, a low molecular weights (~3...
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Linear hydrophilic derivatives are expected to soften lignin and improve its utilization in composite applications. Oxidation by means of laccase in the presence of oxygen was employed in an attempt to functionalize commercial kraft lignin by vanillic acid-PEG ester and ether derivatives. Thielavia arenaria and Melanocarpus albomyces laccases at pH 6 and 8 were used. According to O2 consumption...
متن کاملIsolation of Residual Kraft Lignin in High Yield and Purity
In this paper, we report on a novel residual lignin isolation method. Initially we demonstrate that, in order to cellulolytically isolate residual lignin in high yield, the cellulosic structure of the pulp should be exposed as much as possible. Consequently, we developed a two-step method that first uses a mild enzymatic treatment to render most of the carbohydrates water-soluble and remove hem...
متن کاملBehaviour of Residual Lignin in Kraft Pulp During Bleaching
of Gasification of Black Liquor Char by actions of Some Sulfur Compounds, Inorg. Steam, IEC Research 30(7): 1594 (1991). Chem. 22(22):3243 (1983). 26. DEARNALEY, R.I., KERRIDGE, D.H. and 27. ZOU, X., Recovery of Kraft Black Liquor ROGERS, D.J., Molten Lithium Sulfate-SoIncluding Direct Causticization, Ph.D. Metallurgical Trans. B 19B(2):73 (1988). Thesis, McGill Univ. (1991). 28. WYNNYCKYJ, J.R...
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ژورنال
عنوان ژورنال: JAPAN TAPPI JOURNAL
سال: 1993
ISSN: 0022-815X,1881-1000
DOI: 10.2524/jtappij.47.285