2 edition of chlorination of softwood kraft pulp in a high-intensity laboratory mixer. found in the catalog.
chlorination of softwood kraft pulp in a high-intensity laboratory mixer.
Paul Francis Earl
Written in English
|The Physical Object|
|Number of Pages||230|
Chlorination bleaching is the second stage of the pulp bleaching process. It is the cheapest bleaching agent for eliminating tal chlorine (EC) reacts selectively with the . A process for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine by partially delignifying the pulp to a K No. of about 10 or less and a viscosity of greater than about 13 cps; and further delignifying the partially delignified pulp with an effective amount of ozone for a sufficient time to obtain a substantially delignified pulp Cited by:
A static mixer will rapidly mix the chlorine into the water but it doesn’t give you time. Depending on what you’re trying to do, you might need a contact tank. If you’re after disinfection then it’s better to use some kind of contact tank to get time because the bacteria needs a little bit of time with the chlorination . Jenco Products Inc. Center Point 70 Blvd., Huber Heights, Ohio U.S.A.
Wet pulp was mixed with about mL of pulp filtrate to give a total wet weight of exactly g, and then put in a Hobart mixer. NHA ( g) was dissolved in mL of pulp filtrate, and laccase (final . The Saint-Félicien mill provides northern bleached softwood kraft pulp (product known as NBSK pulp) to various sectors of the paper industry in Canada, the United States and Europe, for use in.
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Laboratory Refining of Bleached Softwood Kraft Pulp in Water and a Series of Alcohols of Different Molecular Weights and Polarities: Effects on Swelling and Fiber Length. Piotr Przybysz, a Marta. totally chlorine-free bleached kraft pulps were used as the starting material; a Scandinavian softwood pulp (mixture of Picea abies and Pinus sylvestris) and a Scandinavian birch pulp (Betula pendula Cited by: LISTOFFIGURES Figure lo 2.
3o 4. 11 TheDistributionofChlorineamongElementary Chlorine,HypochlorousAcidandHypochlorite. The effect of mechanical treatment on softwood kraft pulp fibers. Pulp and fiber properties Article (PDF Available) in Paperi Ja Puu 86(5) January with Reads. Later, the softwood pulp line studied used only C at the first chlorination stage, thus having a bleaching sequence of D0-E~-D1- hardwood pulp line used only C at the first chlorination stage, and its chlorination sequence can be described as Do-E1-E/O-D1-E2- by: The differences between unbleached and bleached softwood kraft pulp fibres referred to characteristic temperatures and mass losses during various thermogravimetric steps, lower overall.
Date HS Code Description Origin Country Port of Discharge Unit Quantity Value (INR) Per Unit (INR) Nov 22 GI FLUFF PULP UNTREATED BLEACHED SOFTWOOD KRAFT PULP. This study compares the suitability of using birch kraft pulp or softwood kraft pulp in the preparation of TEMPO-oxidized pulp, MFC and superabsorbent foam.
TEMPO oxidation was Cited by: This is top quality pulp with the highest environmental performance, sourced from own forests in northern Sweden.
Here up north, in our cold climate, trees grow slowly resulting in strong and slender fibres ideal for making high quality pulp. SCA Pure is our NBSK pulp. Title: Xylanase prebleaching of kraft pulps derived from three softwood species: Creator: Nelson, Sandra L.
Date Issued: Description: For over a decade, the kraft pulp and paper industry has been challenged to find bleaching sequences that produce bright, high quality pulp Cited by: 1.
Raw material pulps play an important role in the refining process. A market softwood bleached kraft pulp from Canfor pulp mill in Northern British Columbia (Canada) was used for this study.
This softwood. This all-inclusive book of chlorine-based chemicals is designed to help the wastewater professional apply the science of disinfection using the most up-to-date practices to ensure safety and control odors.
pulp bleaching using elemental chlorine or chemicals generating elemental chlorine should be directed at reduction and elimination of 2,3,7,8-TCDD and 2,3,7,8-TCDF.
The adsorbable organic halogen. The efficiency of dechlorination was higher for the kraft pulp taken from the D2 stage than from the E1 and E2 stages of the bleaching process. The high ROX content of the pulp samples Dechlorination of Bleached Kraft Pulp. Initially, we used ultrafiltration to fractionate the BKME from a mill producing elemental chlorine free softwood pulp.
The HMW material (> Da) fraction contained 20% of the chemical oxygen. Pilot plant studies have been performed at two facilities, one a softwood kraft and the other a hardwood kraft mill Results of these studies showed a reduction in CEK of 26 and 24% for softwood and hardwood, respectively Also shown was a reduction in chlorine consumption.
Three types of kraft pulps (unbleached softwood. unbleached hardwood and oxygen prebleached hardwood kraft pulps) were chlorinated at various levels of chlorine ratio () and residual Author: Hiroyuki Shintani, Yuji Matsumoto, Gyosuke Meshitsuka.
USB1 US09/, USA USB1 US B1 US B1 US B1 US A US A US A US B1 US B1 US B1 Authority US United States Prior art keywords pulp stage chlorine Cited by: 9. No significant difference between oxygen dilignified and non-oxygen delignified softwood kraft pulp could be established.
Results of on- site pilot plant studies of the SLC Extraction Process Use of hypolite bleach in short sequence pulp. Title: Little green book, Author: Annex Business Media, Name: Little green book, Length: 89 pages, Page: 1, Published: and unbleached softwood kraft pulp Paper:mt/y.
reference pulps were produced in a 30 L forced circulation laboratory digester, whereas the simulated fiber line pulps were cooked in a laboratory digester equipped with a mixer.
The cooking conditions were the same in both cooking experiments. The cooking liquor was prepared in the laboratory File Size: KB.Ash Treatment and the Chlorine and Potassium Balance 17 Process Simulation in the Pulp and Paper Industry 18 Simulation of Kraft Mill Chemical Balance 20 Pulp and Paper Simulators 21 Analysis of the Literature Survey 23 3.
METHODOLOGY 24 Evaluation of Pulp Cited by: 3.Alongside the traditional aspects of pulping processes, pulp used in industry and paper pulps, this book describes all pulping processes used for paper and board manufacturing as well as waste liquor treatment, pulp bleaching and environmental aspects, while also covering pulp .