Results 21 to 30 of about 2,158 (213)

ANTHRAQUINONE ADDITION IN THE ALKALINE PULPING OF Eucalyptus saligna

Ciência Florestal, 2009
The present work evaluated different alkaline pulping conditions for Eucalyptus saligna wood. The objective was to evaluate the influence of the anthraquinone (AQ) on the reduction of the total reduced sulfur (TRS) in the aerial emissions, by reducing ...
Lúcia Helena Jerônimo, Celso E. B. Foelkel, Sônia M. B. Frizzo   +2 more
doaj   +1 more source

Studies on the Cooking Mechanism of Wood. XVI. On the Mechanism of Kraft Cooking [PDF]

Bulletin of the Chemical Society of Japan, 1956
Abstract 1. Hydrogen sulphide cooking of α-guaiacyl propanol (VI) gave bis(1-(4-hydroxy-3-methoxyphenyl)-1-propyl) monosulphide (VIII) and disulphide (VII). 2. Vanillyl monosulphide was decomposed with alkali at 130°. Vanillin, vanillyl alcohol and the secondary products from vanillyl alcohol were identified.
Hiroshi Mikawa, Koichiro Sato, Chizuko Takasaki, Kiyo Ebisawa   +3 more
openaire   +1 more source

Pulping and paper making properties of Populus costanzo [PDF]

تحقیقات علوم چوب و کاغذ ایران, 2010
In this Investigation chemical, physical, morphology, pulp and paper making characteristics of   Populus costanzo were studied. The average dry and critical specific gravity was found to be  0.39and 0.36 and the fiber morphology including fiber length  ,
Abas Fakhryan, Hossein Hosseinkhani, Fardad Golbabaei, Mohammad mehdi Brazandeh   +3 more
doaj   +1 more source

Evalution Prosopis juliflora(Somr) potential in Kraft Pulping [PDF]

Iranian Journal of Wood and Paper Industries, 2016
In this research, physical, biometrical and chemical properties of Prosopis juliflora wood and then physical and mechanical properties of kraft pulp from aforesaid species were investigated and calculated. Dry and critical densities of Prosopis juliflora
ABBAS fAKHRYAN ROGHANI, Rasool yazdani, Ali Ghasemian, Hosain Resalati   +3 more
doaj  

Tailor-made alkaliphilic and thermostable fungal laccases for industrial wood processing

Biotechnology for Biofuels and Bioproducts, 2022
Background During the kraft process to obtain cellulosic pulp from wood, most of the lignin is removed by high-temperature alkaline cooking, released in the black liquors and usually incinerated for energy. However, kraft lignins are a valuable source of
David Rodríguez-Escribano, Rocío Pliego-Magán, Felipe de Salas, Pablo Aza, Patrizia Gentili, Petri Ihalainen, Thomas Levée, Valérie Meyer, Michel Petit-Conil, Sandra Tapin-Lingua, Michael Lecourt, Susana Camarero   +11 more
doaj   +1 more source

Study of cooking kinetics in kraft pulping.

KAGAKU KOGAKU RONBUNSHU, 1986
クラフト蒸解反応では蒸解時間, 温度, アルカリ濃度, 水硫化イオン濃度およびチップ厚さが反応の変数として主な要因である.本報告はブナ (広葉樹) とアカマツ (針葉樹) の二種の材について, これらの5変数を3n型の直交配列表に従って組み合わせて蒸解実験を行い, 全ての変数が, 得られるパルプの特性値の変数に対して有意であることを明らかにした.また実験結果の分散分析から, 本研究での実験条件の範囲では5変数間の相互作用を考慮しなくてもよいことがわかった.さらに, 得られた結果から回帰式としての反応速度式を求め, 別に長時間の時間経過を含む追認実験を行って速度式の有用性を明らかにした.蒸解初期での反応速度を比較するため, チップ厚さを変えて実験を行い, 薬剤のチップ内拡散の影響を検討した.
Kojima, Miyuki, Aoi, Junzo, Tsuchiya, Hiroshi, Nagasawa, Takeo, Komiyama, Hiroshi, Inoue, Hakuai   +5 more
openaire   +2 more sources

Extrusion of Softwood Kraft Lignins as Precursors for Carbon Fibres

BioResources, 2015
There is much interest in using less expensive raw materials as precursors for carbon fibre manufacture to increase the utilisation of strong, light-weight composite materials in the transportation sector. One such potential raw material is lignin.
Lennart Salmén, Elisabeth Bergnor, Anne-Mari Olsson, Mårten Åkerström, Anders Uhlin   +4 more
doaj   +1 more source

Galactoglucomannan stabilization during the initial kraft cooking of Scots pine [PDF]

, 2010
The behaviour of wood components was studied during kraft cooking of Wiley milled Scots pine (Pinus sylvestris L.) at low temperatures characteristic for the initial phase, but comprising alkali concentrations ranging from 0.31 mol l-1 to 1.55 mol l-1 ...
Tamminen, Tarja, Sixta, Herbert, Paananen, Markus, Herbert Sixta, Tarja Tamminen, Markus Paananen, Nieminen, Kaarlo, Kaarlo Nieminen   +7 more
core   +1 more source

Production of dissolving pulp from geronggang (Cratoxylum arborescens) wood through prehydrolysis and kraft-SAQ cooking process [PDF]

, 2023
Geronggang (Cratoxylum arborescens) is one of the native species of peatlands that are distributed in several areas of Indonesia. Geronggang is a woody plant with considerable potential as an alternative raw material for the manufacture of dissolving ...
Evelyn, Drastinawati, Drastinawati, Sendra Erfa Satria, Mutamima, Anisa, Aprianis, Yeni, Evelyn, Evelyn, Deviona, Deviona, Yeni Aprianis, Erfa Satria, Sendra, Dion Arfi, Muhammad, Chairul, Chairul, Drastinawati, Muhammad Humam Ridho, Humam Ridho, Muhammad, Anisa Mutamima, Muhammad Dion Arfi, Chairul, Deviona   +17 more
core   +1 more source

Influences of 2-ethylanthraquinone on lignin degradation in alkaline cooking of Eucalyptus pellita wood

Journal of Wood Science
The impact of 2-ethylanthraquinone (2-EAQ) on alkaline cooking of Eucalyptus pellita wood was examined by analyzing pulp yield, kappa number, the structure and weight-averaged molecular weight (Mw) of dissolved lignin in black liquor and residual lignin ...
Ke Luo, Taiki Nishimoto, Yasuyuki Matsushita   +2 more
doaj   +1 more source