| 摘要 |
The invention relates to a method at the manufacture of chemical cellulose pulp by treating the pulp with a reducing agent in alkalic environment. It is desired to be able to drive the delignification as far as possible before the final bleaching without carbohydrate attack. According to the invention, this is achieved in that the pulp in a special step is treated with a sulphide, for example sodium sulphide and/or polysulphide, in alkalic environment.
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