摘要
预水解是基于硫酸盐法生产溶解浆过程中的关键一步,主要目的是在原料进行制浆之前尽可能多地从植物纤维原料中去除半纤维素。本研究探索了预水解段添加磷酸对竹柳原料中组分含量的影响。结果表明,在竹柳预水解段添加磷酸和增大液比、增加保温时间均有助于竹柳原料中聚戊糖的脱除,但不利于α-纤维素的保留;当磷酸用量为3%(相对于绝干原料),保温时间为60 min时,液比为6∶1时,预水解后竹柳中聚戊糖去除率为71.8%,α-纤维素含保留率为93.4%。
Pre-hydrolysis is a critical step in the production of dissolving pulp from the kraft process,and its main purpose is to hydrolyze the hemicelluloses as much as possible from cellulose fibers before subsequent pulping. In this paper,the effects of addition of phosphoric acid in the pre-hydrolysis process on the main component contents of bamboo-willow were explored. The result showed that with the addition of phosphoric acid in the pre-hydrolysis process of bamboo-willow and increasing the time at max temperature could help the removal of pentosan,but this was not conducive to the retention of α-cellulose. When the phosphoric acid dosage was 3%( based on oven dried bamboo-willow),the max temperature was 165℃,the time at max temperature was 60 min,the pentosan content in the pre-hydrolyzed bamboo-willow was gradually decreasing,the α-cellulose content obviously increased as the liquid-to-wood ratio was 6∶ 1.
作者
张金超
吴朝军
于冬梅
仝瑞平
ZHANG Jin-chao;WU Chao-jun;YU Dong-mei;TONG Rui-ping(Key Lab of Pulp and Paper Science and Technology of Ministry of Education, Qilu University of Technology ( Shandong Academy of Sciences), Ji'nan, Shandong Province,25035)
出处
《中国造纸》
CAS
北大核心
2018年第4期30-34,共5页
China Pulp & Paper
基金
国家重点研发计划(2017YFB0307900)
山东省自然科学基金(ZR2017LC016)
关键词
竹柳
预水解
磷酸
聚戊糖
bamboo-willow
pre-hydrolysis
phosphoric acid
pentosan