膜技术分离浓缩葡醛酸水母液的工艺研究

Studies on the Separation and Condensation of D-glucuronolactone Solution by Membrane Technology

文章针对葡醛酸水母液中残存的硝酸需要分离处理的企业技术难题,采用膜技术对葡醛酸水母液进行了分离浓缩。主要考察了不同操作方式下葡醛酸水母液的体积稀释倍数与体积稀释比的关系、体积稀释倍数与透余液硝酸浓度的关系、透过液硝酸脱除率、分离前后葡醛酸水母液透过液与透余液波美度变化等工艺参数。结果表明:料液稀释倍数达到4倍以后,采用洗滤技术对葡醛酸水母液中硝酸的脱除具有明显的效果;采用纳滤膜技术可以对其进行浓缩。这些研究对改进葡醛酸水母液的生产工艺、降低生产成本具有积极的意义。

In this paper, different concentrations of D-glucuronic acid hydrolysis-solution separated by membrane technology, mainly focusing on the dependence of the times of volume dilution on the ratio of volume dilution, removal efficiency of nitric acid in the permeate, the change trend of Baume in the feed, the condensate and permeate solution. The experimental findings indicate that D-glucu- ronic acid hydrolysis-solution can be separated via diafiltration process, demonstrating its significance in the improvement of production pattern of D-glucuronic acid hydrolysis- solution.