CAJ | 학술논문

木糖醇作为一种可作为甜味剂的糖醇具有广泛的应用前景.目前工业上酸水解法制备木糖醇的过程中需要一个脱除水解液中的残酸的工艺步骤.传统的残酸去除方法为饱和石灰水中和法,存在能耗高、消耗的化学试剂多、污染大等缺点.为实验木糖醇的清洁生产,本文采用自我组装的电渗析装置对木糖水解液中的残酸进行了选择性的去除,考察了操作电流对残酸去除及木糖得率的影响.结果表明,当操作电流为 30 mA·cm?2 时,电渗析过程对残酸的去除率大于 99%,其木糖的得率为 84.9%,电渗析工艺处理木糖水解液的能耗为 179 kW·h·t?1,脱酸工序成本为每吨母液 139 元,具有良好的经济效益和环境效益.由此可见,电渗析工艺在木糖醇酸水解法制备过程中具有广泛的应用前景.
목당순작위일충가작위첨미제적당순구유엄범적응용전경.목전공업상산수해법제비목당순적과정중수요일개탈제수해액중적잔산적공예보취.전통적잔산거제방법위포화석회수중화법,존재능모고、소모적화학시제다、오염대등결점.위실험목당순적청길생산,본문채용자아조장적전삼석장치대목당수해액중적잔산진행료선택성적거제,고찰료조작전류대잔산거제급목당득솔적영향.결과표명,당조작전류위 30 mA·cm?2 시,전삼석과정대잔산적거제솔대우 99%,기목당적득솔위 84.9%,전삼석공예처리목당수해액적능모위 179 kW·h·t?1,탈산공서성본위매둔모액 139 원,구유량호적경제효익화배경효익.유차가견,전삼석공예재목당순산수해법제비과정중구유엄범적응용전경.
Xylitol is an important sugar alcohol widely used as sweetener. A processing route to remove the residual acid from xylose hydrolyzed solution in industrial production of xylitol is the acid hydrolysis method. Conventional neutralization method with lime has many drawbacks such as high energy consumption, large consumption of chemicals and environmental pollution. To achieve a clean production of xylitol, a self-resemble electrodialysis stack was used for selective removal of residue acid. The influences of current density on the removal ratio of residue acid and recovery ratio of xylose were investigated. The residue acid removal rate was higher than 99% and xylose recovery rate reached 84.9% at a current density of 30 mA·cm?2. The total energy consumption for xylose hydrolyzed solution was 179 kW·h·t?1 and the deacidification process cost was estimated to be 139 ￥·t?1, indicating economic and ecological advantages of this technology. Thus the electrodialysis is a very promising technology for production of xylitol.