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Chlorine-free bleaching

Caro s acid is effective ia delignifying wood pulp (qv) made by chlorine-free bleaching sequences. When conditions are carefully controlled, the mechanical properties of the final paper (qv) are not impaired. These processes were developed ia the 1980s and commercialized ia the 1990s (68). [Pg.95]

Domtar Inc., Chlorine-Free Bleaching of Kraft Pulp Feasibility Study, Ontario Ministry of the Environment, and Environment Canada, June 1993. [Pg.910]

Totally chlorine free bleaching (TCF) technologies, 10 304-305 Totally chlorine-free (TCF) bleaching processes, 21 44... [Pg.959]

Gedruckt auf saurefreiem, chlorfrei gebleichtem Papier-TCF / Printed on acid-free and chlorine-free bleached paper... [Pg.4]

Hydrogen peroxide, H2O2, is a strong oxidizing agent. It is used as an antiseptic in a 3.0% aqueous solution. Some chlorine-free bleaches contain 6.0% hydrogen peroxide. [Pg.264]

Murata, S. Kondo, R. Sakai, K. Kashino, Y. Nishida, T. Takahra, Y. Chlorine free bleaching process of Kraft pulp using treatment with the fungus IZU-154. Tappi J. 1992, 75, 91-94. [Pg.494]

Why are solid, unmodified alumina, silicas, and zeolites able to be used as catalysts (77) Are lanthanide catalysts really environmentally friendly 18) What are solid acids and solid bases and how can they be used for catalysis 19) Why is catalysis a foundational pillar of green chemistry 20) What are the advantages of a totally chlorine free bleaching process (27)... [Pg.58]

S Origgi, V Trichet, A Castellan, and RS Davidson. The Action of Phloroglucinol in the Presence of Hydrochloric Acid on Photoaged, Totally-Chlorine-Free, Bleached Chemical Pulps. J. Photochem. Photobiol. A Chem. 103 159-162, 1997. [Pg.98]

G Gellerstedt, L Heuts, D Robert. Structural changes in lignin during a totally chlorine free bleaching sequence. Part II An NMR study. J Pulp Pap Sci 25 111-117, 1999. [Pg.434]

Figure 16.2a summarizes the major uses of chlorine. Chlorinated organic compounds, including 1,2-dichloro-ethene and vinyl chloride for the polymer industry, are hugely important. Dichlorine was widely used as a bleach in the paper and pulp industry, but environmental legislations have resulted in changes (Figure 16.2b). Chlorine dioxide, CIO2 (an elemental chlorine-free bleaching agent), is prepared from NaC103 and is favoured over CI2 because it does not produce toxic effluents. ... Figure 16.2a summarizes the major uses of chlorine. Chlorinated organic compounds, including 1,2-dichloro-ethene and vinyl chloride for the polymer industry, are hugely important. Dichlorine was widely used as a bleach in the paper and pulp industry, but environmental legislations have resulted in changes (Figure 16.2b). Chlorine dioxide, CIO2 (an elemental chlorine-free bleaching agent), is prepared from NaC103 and is favoured over CI2 because it does not produce toxic effluents. ...
Hydrogen peroxide is a chemical used in large volumes for chlorine free bleaching and in a wide variety of chemical processes as environmentally friendly oxidant, mainly due to its unique feature of producing water as the only by-product [1]. [Pg.327]

Printed on acid-fiee and chlorine-free bleached paper... [Pg.220]

Zimmermann M, Patt R,Kordsachia O, Densmore HW.ASAM pulping of Douglas-fir followed by a chlorine-free bleaching sequence. Tappi J 1991 74(11) 129—34. [Pg.123]

See other pages where Chlorine-free bleaching is mentioned: [Pg.481]    [Pg.279]    [Pg.251]    [Pg.610]    [Pg.176]    [Pg.176]    [Pg.454]    [Pg.105]    [Pg.252]    [Pg.581]    [Pg.992]    [Pg.1162]    [Pg.516]    [Pg.2000]    [Pg.74]    [Pg.227]    [Pg.396]    [Pg.433]    [Pg.433]    [Pg.434]    [Pg.640]    [Pg.121]    [Pg.228]    [Pg.534]    [Pg.57]    [Pg.593]    [Pg.165]   
See also in sourсe #XX -- [ Pg.610 ]



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CHLORINE-FREE

Chlorine bleach

Chlorine bleaching

Chlorine-free pulp bleaching

Elemental chlorine free bleaching

Elemental chlorine free bleaching chemicals

Elemental chlorine free bleaching process

Total chlorine free bleaching

Total chlorine free bleaching processes

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