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Process for increasing the degree of whiteness of paper making stock from recycled paper
Process for increasing the degree of whiteness of paper making stock from recycled paper
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机译:提高再生纸造纸原料白度的方法
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摘要
The whiteness of paper fibre, in an aqueous suspension containing at least 5% dry material, is increased by the use of oxidising bleaches, the bleaching action being further increased by molecular O2. The process takes place under excess pressure of at least 0.1 bar and the gas used contains 50% O2 at the most.
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