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| Study of the Pulping Performance of Masson Pine Based on the Deeply Pre-hydrolysis Kraft Method |
| Received:March 13, 2025 Revised:May 01, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.09.010 |
| Key Words:pre-hydrolysis kraft method masson pine hemicellulose lignin dissolving pulp |
| Fund Project:福建省引导性项目（2023H0008）。 |
| Author Name | Affiliation | Postcode | | LUO Xiyao* | College of Materials Engineering, National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | ZHENG Xiaobin | College of Materials Engineering, National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | ZHANG Haoyun | College of Materials Engineering, National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | YANG Jiawei | College of Materials Engineering, National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | HUANG Liulian | College of Materials Engineering, National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | CHEN Lihui | College of Materials Engineering, National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 | | LU Hongliang* | China Tobacco Fujian Industrial Co., Ltd., Xiamen, Fujian Province, 361012 | 361012 | | CHENG Dong | Guangdong Guanhao New Materials Research & Development Co., Ltd., Guangzhou, Guangdong Province, 511458 | 511458 | | LI Jianguo* | College of Materials Engineering, National Forestry & Grassl and Administration Key Lab for Plant Fiber Functional Materials, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province, 350108 | 350108 |
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| Abstract:Using masson pine as raw material， deeply pre-hydrolysis kraft pulping process was employed to investigate the effects of pre-hydrolysis conditions on the chemical composition and fiber morphology of masson pine. The results showed that prolonging the pre-hydrolysis time and increasing the pre-hydrolysis temperature resulted in extensive dissolution of hemicellulose and disruption of the raw material structure， but also led to a decrease in yield of raw material. When the conditions were 135 min of pre-hydrolysis time， 170 ℃ of pre-hydrolysis temperature， and liquor-to-wood ratio of 1∶4， the hemicellulose， cellulose， and lignin contents of masson pine changed from 22.80%， 46.81%， and 28.40% to 12.71%， 49.82%， and 27.61%， respectively， the dissolution rate of hemicellulose was 53.3%， and the yield of pre-hydrolyzed chips was 83.9%. It’s that during the pre-hydrolysis process， the dissolution of hemicellulose induced structural changes in the masson pine fibers， which facilitated the penetration and diffusion of chemical agents during the cooking process and thus promoted lignin dissolution. When the cooking conditions were 22% of active alkali（NaOH）， 35% of sulfidity， 170 ℃ of cooking temperature， 110 min of cooking time， and liquor-to-wood ratio of 1∶4.5， the fine pulp yield of pre-hydrolysis-kraft pulp in the cooking stage was 47.1%， with Kappa number of 38.8 and intrinsic viscosity of 796 mL/g. |
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