竹浆木质素高效分散剂在酚水水煤浆中的应用  

Application of High-Efficiency Bamboo Lignin-Based Dispersant to Coal Phenol-Water Slurry

作　　者：杨东杰[1] 李旭昭[1] 李会景[1] 江红艳[1] 李琼[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2014年第2期1-7,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家国际科技合作专项项目(2013DFA41670);国家杰出青年科学基金资助项目(20925622);国家自然科学基金资助项目(21176096)

摘　　要：以竹浆造纸黑液为原料制备了竹浆木质素高效分散剂,并应用于酚水水煤浆的制浆;研究了竹浆木质素高效分散剂的相对分子质量和磺化度对水煤浆浆体流动性的影响,并进一步研究了助剂种类及掺量、分散剂掺量和制浆温度对酚水水煤浆制浆性能和稳定性能的影响.结果表明:具有中等相对分子质量和中等磺化度的分散剂制浆性能较优,分散降黏作用优于FDN;三聚磷酸钠与木质素分散剂复合使用可以降低水煤浆浆体的表观黏度,但加入量过高降黏效果变差,加入量为15%时,分散降黏效能最好;随着木质素分散剂掺量的增大,酚水水煤浆的表观黏度不断减小;随着制浆温度的升高,酚水水煤浆的表观黏度先减小后增大,在温度为55℃时,分散剂的降黏效果最优,浆体的表观黏度最小;木质素分散剂掺量为0.75%时,其分散降黏性能最优,此时水煤浆的稳定性最好.A series of high-efficiency bamboo lignin-based dispersants for the pulping of coal phenol-water slurry were prepared by using bamboo black liquor as the main raw material.Then,the influences of relative molecular mass and sulfonation degree of the dispersant on the slurry fluidity were investigated.Furthermore,the effects of the type and dosage of additive,the dispersant do-sage and the pulping temperature on the pulping performance and the stability properties of coal phenol-water slurry were discussed.The results indicate that （1 ）as compared with FDN,the dispersant with moderate sulfonation degree and medium relative molecular mass possesses better pulping performance in reducing the viscosity of coal phenol-water slurry;（2）the combination of sodium tripolyphosphate and the dispersant may reduce the apparent viscosity of the slurry and 15% is a suitable dosage of sodium tri-polyphosphate;（3 ）the apparent viscosity of the slurry continuously decreases with the increase of dispersant do-sage;（4）with the increase of pulping temperature,the apparent viscosity of the slurry first decreases and then in-creases,with its minimum occurring at 55℃;and （5 ）coal phenol-water slurry shows best stability properties at the optimal dispersant dosage of 0.75%.

关 键 词：竹浆造纸黑液 竹浆木质素分散剂 酚水水煤浆 磺化度 相对分子质量 稳定性能 流动性 

分 类 号：TQ536[化学工程—煤化学工程]