PRODUCTION OF PULP AND RECOVERY OF XYLOSE FROM HARDWOOD——Ⅱ. The Optimal Process Conditions for Prehydrolysis of Eucalyptu Citriodora Chips with Dilute Sulphuric Acid and Sulfate Pulping
Mechanism of mixing in pulp bleaching and factors that influence mixing quality such as pulp suspension rheology and so on are mainly studied and discussed.
and(4) the apparent viscosity of the pulp suspension with a mass fraction of 13.2% is 7.94Pa·s,and the corresponding energy dissipation is 498.96kW/m~3,which is 45.62% of the input energy and increases with the mass fraction of the suspension.
Design and Function Mechanism on Polymer Additives for Papermaking Ⅲ.Effects of Charge Distribution in Pulp Fibers on Improvement of Paper Wet-strength and Draining of N-Cl-PAM
Based on the growth, wood property of the ortets, and rooting abilities of cuttings, 32 Pinus massoniana clones for pulp use were selected from forests of superior provenance, mixed families, and progeny test of seed orchard by two-step selection.
The effect of cellocandin, an enzymatic preparation from Geotrichum candidum 3C-106 with cellulolytic and xylanolytic activities, on defibring of waste paper and acceleration of desiccation of paper pulp was studied.
Copolymers of the C9 hydrocarbon fraction of liquid pyrolysis products with maleic anhydride and their esterification products as additives to paper pulp
The influence exerted by copolymers of the C9 fraction of liquid pyrolysis products of petroleum raw materials with maleic anhydride and by their esterification products, added to paper pulp, on the main paper properties was examined.
Crude substrates such as wheat bran and wheat flour residues, used in combination with a local cellulose esparto grass paper pulp as an alternative nitrogen source and cellulose substrates, also gave high cellulase yields.
In the pretreatment an enzyme dose was utilized and acetosolv pulp suspension of 3% (w/v) with different solvents (distilled water, 0.05 mol/L acetate buffer pH 5.5 and 0.05 mol/L phosphate buffer pH 7.25) stirred at 85 rpm for 2 or 4 h.
Handsheets were prepared with aluminum sulfate under various conditions of pulp suspension, and factors influencing retention behavior of aluminum components on the handsheets were studied on the basis of their aluminum contents.
According to the SEM-EDX measurement for handsheets prepared from a pulp suspension by adding 2% (on dry weight of pulp) aluminum sulfate, the aluminum components were distributed almost homogeneously in the cross sections of pulp fibers.
When aluminum sulfate was added to a pulp suspension prepared using deionized water, a streaming potential of the suspension went from negative to slightly negative according to the adsorption of aluminum components on the pulp fibers.
The objective of this study was to use dynamic contact angle (DCA) analysis and inverse gas chromatography (IGC) to probe the surface-chemical changes in wood pulp fibers during recycling.