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| Pulp & Paper |
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Hydrogen peroxide is commonly used to brighten, delignify and control environmental upsets. In chemical pulp mills, hydrogen peroxide can be used to both delignify and brighten. Since it will effectively replace a portion of the chlorine dioxide requirement in a conventional kraft bleach sequence, and it is an excellent option for the bleacher that needs to increase brightness, increase throughput or lower bleaching costs. For mechanical pulp, hydrogen peroxide is the only brightening solution that will provide high brightness gains (>15 brightness points) while preserving yield. In secondary fiber processing, hydrogen peroxide is a versatile brightener. It can be used in the pulper, disperger, or in a traditional tower post-bleach.
Chemical pulp bleaching
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Hydrogen peroxide is widely used in both ECF and TCF bleaching sequences to minimise the environmental impact of the bleaching process, improve plant runability and in some situations to increase pulp mill capacity.
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Mechanical pulp bleaching
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The use of hydrogen peroxide in combination with caustic soda for the bleaching of mechanical pulps can lead to high, stable brightness and to improved strength as well as better optical properties, whilst maintaining high yield.
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Recycled pulp bleaching
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Hydrogen peroxide finds application in all types of recycling processes including washing deinking, flotation deinking and simple ink dispersion processes.
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