| 摘要 |
Disclosed is a method for improving the kraft pulping and chemical recovery processes. In the method non-traditional pulping chemicals are generated on site and used in addition to the traditional pulping chemicals. The additional active chemicals are certain organic sulphide compounds, in particular methyl mercaptide ion, which are derived from volatile compounds produced in significant quantities by heat-treating the spent pulping liquor at a temperature higher than the pulping temperature. The method has two main advantages. Firstly, pulping is enhanced by the additional pulping chemicals. Secondly, the recovery and reuse of pulping chemicals is considerably more flexible than in the conventional kraft process.
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