Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Kraft pulping"”.
-
Structural changes to Pinus radiata wood lignin during kraft pulping and bleaching
… lignin will assist the development of improved pulping and bleaching sequences. However, before this can be done, it is necessary to develop approaches to lignin isolation which provide more representative lignin samples without resorting to what are often very tedious extraction procedures. A …
-
Rapid analysis of inorganic and organic anions in kraft pulping liquors by capillary zone electrophoresis
… sulphate, sulphite, sulphide and polysulphide in kraft pulping liquors and effluents by capillary zone electrophoresis. In addition, several other key anions, including: hydroxide, carbonate, oxalate, formate and chloride can be quantified in the same process liquors. Two approaches were developed …
-
The purification of semi-chemical pulping waste by aeration
… a part of this oxygen demand of semi-chemical kraft pulping waste before the waste is discharged into streams. The waste used in this investigation was prepared from a pulping mixture obtained from the Big Island, Virginia, mill of the National Container Corporation, and as prepared, had a …
-
Dynamic simulation of a recausticizing plant
… been recognized as a very important part of the Kraft pulping process. Because of the multiple objectives involved in the operation of the recausticizing plant, different operating conditions, and the complex interdependencies of the various units of the system, the best operating conditions are …
-
The effect of whole tree chips in pulp and papermaking
… Many reports have been published in the field of pulping whole tree chips, and articles pertinent to softwood pulping are discussed in the literature review of the present study. Because a noticeable lack of information on mixed component pulping of southern pines was observed in the literature, …
-
Modeling of Kraft Mill Chemical Balance
… on sodium (Na) and sulfur (S) balances in the kraft pulping process. In order to maintain a proper balance of Na and S, kraft mills may need to adopt different makeup strategies. For this purpose, a dynamic model was developed to predict the Na and S balance in the kraft recovery cycle, as well …
-
Biofuels from lignin and novel biodiesel analysis
… of LignoBoost derived lignin recovered from Kraft pulping streams using an acid precipitation/washing methodology. Functional group analysis and molecular weight profiles were determined by nuclear magnetic resonance (NMR) and size exclusion chromatography. These findings gave valuable …
-
Evaluation of membrane filtration for treatment of black liquor in small-scale pulp and paper mills in India
… liquor, a strongly polluting byproduct from the kraft pulping process in pulp and paper mills, is traditionally treated by being passed through multiple effect evaporators and burned in a recovery boiler to produce energy and recover chemicals. However, the traditional treatment of black liquor …
-
Analysis of intra-increment pulping and papermaking properties of loblolly pine wood
… digested to four different time schedules using kraft pulping process. All other cooking variables were held constant. A total of twenty pulps were prepared. Significant differences were observed in pulp yields between intra-incremental growth zones. For the longer digestion times, fraction 1, …
-
The Improvement of Interfacial Bonding, Weathering and Recycling of Wood Fibre Reinforced Polypropylene Composites
… deals with medium density wood fibre (MDF) and Kraft fibre reinforced polypropylene (PP) composites produced using extrusion followed by injection moulding. Initially, composites were produced with MDF fibre using 10, 20, 30, 40, 50 and 60 wt% fibre, and 1, 2, 3 and 4 wt% maleated polypropylene …