A low resin content chemical pulp preparation process based on biological aids
By combining pretreatment with white rot fungi and treatment with compound enzyme solution in a multi-step process, the problem of high resin content in wood chips was solved, the resin content of chemical pulp was reduced, the cooking performance and strength were improved, and the preparation of low resin content chemical pulp was achieved, thus reducing pulping costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGXI SUN PAPER CO LTD
- Filing Date
- 2026-05-27
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, wood chips have a high natural resin content, which requires the addition of a large amount of resin control agents during the pulping process to prevent resin deposition and equipment contamination. Furthermore, extending the storage time of wood chips can lead to a decrease in pulp strength, affecting the quality of the finished product. There is a lack of technical solutions that systematically study the relationship between the storage period of wood chips and the change in resin content.
White-rot fungal solution is used to pretreat wood chip raw materials, combined with two-stage screening, cooking, biological treatment and oxygen descaling. Compound enzyme solution and oxygen descaling agent are used, and finally bleaching treatment is carried out to optimize the storage period and cooking conditions of wood chips, degrade resin and lignin, and reduce resin content.
By combining the pretreatment with white-rot fungi and the synergistic effect of compound enzyme solution, the resin content of chemical pulp is significantly reduced, the cooking performance and strength indicators are improved, the influence of impurities is reduced, and the preparation of low-resin-content chemical pulp is achieved, thereby reducing pulping costs.
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