New approach for upgrading pulp & paper quality: Mild potassium permanganate treatment of already bleached pulps
نویسندگان
چکیده
منابع مشابه
Acid hydrolysis of cellulosic fibres: Comparison of bleached kraft pulp, dissolving pulps and cotton textile cellulose.
The behaviour of different cellulosic fibres during acid hydrolysis has been investigated and the levelling-off degree of polymerisation (LODP) has been determined. The study included a bleached kraft pulp (both never-dried and once-dried) and two dissolving pulps (once-dried). Additionally, cotton cellulose from new cotton sheets and sheets discarded after long-time use was studied. Experiment...
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animals with a view to determining the efficacy of this agent, administered in this fashion, and fixing a dose." Later in the same paper the author recommends " the intravenous injection of 350 c.c. of a 5 per cent, solution of permanganate of potash " in cases of snake-poisoning in human beings. It is against this procedure that I wish to warn the medical profession, and the urgency of the mat...
متن کاملCOMPARATIVE EVALUATION OF TCF BLEACHED HARDWOOD DISSOL’t’ING PULPS
With an annual production of some 3.5 million tons between 1990 and 1995, dissolving wood pulp accounts for only 2% of the total wood pulp production. However, the high demands for cellulose purity and reactivity as well as its manifold routes of utilization are the reason for the advanced state of technology within the pulp industry. For dissolving pulp production, only acid sulfite and prehyd...
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هدف اصلی از این تحقیق به دست آوردن و مقایسه حق بیمه باورمندی در مدل های شمارشی گزارش نشده برای داده های طولی می باشد. در این تحقیق حق بیمه های پبش گویی بر اساس توابع ضرر مربع خطا و نمایی محاسبه شده و با هم مقایسه می شود. تمایل به گرفتن پاداش و جایزه یکی از دلایل مهم برای گزارش ندادن تصادفات می باشد و افراد برای استفاده از تخفیف اغلب از گزارش تصادفات با هزینه پائین خودداری می کنند، در این تحقیق ...
15 صفحه اولEffect of Mechanical Treatment on Properties of Cellulose Nanofibrils Produced from Bleached Hardwood and Softwood Pulps
Bleached hardwood and softwood South African kraft pulps were passed through a commercially available micro grinder for varying number of passes and the properties of the resultant pulps were assessed periodically using microscopy, Fourier transform infrared spectroscopy (FTIR), X-ray crystallography (XRD) and Thermogravimetric analysis (TGA). The ultrastructural analysis of the pulp fibres rev...
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ژورنال
عنوان ژورنال: Carbohydrate Polymers
سال: 2008
ISSN: 0144-8617
DOI: 10.1016/j.carbpol.2008.05.008