摘要
以廉价的玉米秸秆提取物木质素为原料,通过磺甲基化法改性制备水煤浆(coal wa-ter slurry,CWS)添加剂,实验发现合成磺化木质素的最佳工艺条件是:温度T=90℃~95℃,Na2 SO3与木质素质量比2∶1,时间t=6h,37%的甲醛溶液用量为2 mL;红外光谱表明改性物在979 cm-1和633 cm-1处出现了新的强吸收峰;白金版法测定溶液表面张力可降低至36.806 mN/m,说明木质素磺化改性是成功和有效的.作为分散剂将其用于CWS成浆性实验发现:改性产物对CWS能够起到很好的降黏增浓作用,在分散剂使用量为1%的条件下,CWS浓度可高达70%以上,流动性为A级,流速较快且连续,流型细腻,稳定时间达25 d且无硬沉淀产生.
As a raw material,lignin from cheap maize straw could be modified to synthesizing additive through suffocated method,the optimal process parameters of synthesizing suffocated lignin:temperature is 90 ℃-95 ℃,the ratio of mass of and Na2SO3 and lignin is 2,reaction time is 6 h,the dosage of 37% HCHO is 2 mL/g(lignin).The infrared characterization demonstrates that suffocated lignin has new absorption peak at 979 cm 1 and 633 cm-1 ; the surface tension was determined by Baijinban method.It indicates that lignin is modified successfully and effectually.As a dispersant,suffocated lignin is used to study slurry ability of CWS,it is able to reducing apparent viscosity and raising concentration of CWS effectively,when the dosage of dispersant is 1%,the concentration of CWS attains to 70%,liquidity is grade A,velocity faster and unremitting,flow pattern is exquisite,settling time is to 25 d,no hard precipitation.
出处
《煤炭转化》
CAS
CSCD
北大核心
2014年第2期37-41,共5页
Coal Conversion
基金
国家自然科学基金资助项目(51174144)
山西省科学技术发展计划项目(201103210392)