Modifying the Refining Energy Consumption of Chemi-Mechanical Pulping with NaOH-Thiourea-Urea Aqueous Solution
نویسندگان
چکیده
منابع مشابه
Modifying the Refining Energy Consumption of Chemi- Mechanical Pulping with NaOH-Thiourea-Urea Aqueous Solution
To reduce the refining energy consumption of chemi-mechanical pulping, treatment with NaOH-thiourea-urea aqueous solution was studied in this work. By means of single-factor experiments, the effects of alkali dosage, soaking time, and freezing time were evaluated. It was found that the optimal conditions were an alkali dosage of 8%, soaking time of 45 min, and freezing time of 105 min. The resu...
متن کاملNovel Starch Solution Prepared from the Starch in Naoh/thiourea/urea Aqueous Solution and Its Application as Surface Sizing Agent
Novel starch solutions were prepared by dissolving starch in NaOH/ thiourea/ urea aqueous solution, and they were further used as a surface sizing agent at high solids content in papermaking to improve the surface strength of papers. Two methods were adopted to dissolve the starch. In method A dry starch granules were directly added into the prepared solution. In method B a starch slurry was mi...
متن کاملAdsorption of Heavy Metals by Graphene Oxide/Cellulose Hydrogel Prepared from NaOH/Urea Aqueous Solution
By taking advantage of cellulose, graphene oxide (GO), and the process for crosslinking using epichlorohydrin (ECH), we propose a simple and novel method to prepare GO/cellulose hydrogel with good potential to adsorb metal ions. GO nanosheets containing carboxyl and hydroxyl groups were introduced into the surface of the cellulose hydrogel with retention of the gel structure and its nanoporous ...
متن کاملPreparing Cationic Cellulose Derivative in NaOH/Urea Aqueous Solution and its Performance as Filler Modifier
Cellulose etherification with 3-chloro-2-hydroxypropyl-trimethylammonium chloride (CHPTAC) was carried out in NaOH/urea aqueous solution, under homogeneous conditions. The substitution degree of the prepared quaternized cellulose, cellulose-CHPTAC, increased with increasing molar ratio of CHPTAC/anhydroglucose unit (AGU), reaction temperature, and reaction time. The structure of the cellulose-C...
متن کاملKINETICS OF CELLULOSE REGENERATION FROM CELLULOSE-NaOH/THIOUREA/UREA/H2O SYSTEM
The coagulation properties of cellulose-NaOH/thiourea/urea/H2O solutions under various coagulation conditions have been investigated, to determine the kinetics of this special coagulation process (known as including diffusion on the contact surfaces of the polymer solution with the precipitant and the chemical reaction between acid and alkali). The observation was made that, at the beginning of...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: BioResources
سال: 2015
ISSN: 1930-2126
DOI: 10.15376/biores.10.3.4811-4825