陶瓷膜在聚合级L-乳酸纯化工艺中的应用

目的]把陶瓷超滤膜工艺应用在乳酸提取中。方法]研究了影响乳酸热稳定性的影响因素，确定了其限制性浓度，并对陶瓷膜透析液的理化指标与原工艺絮凝后相对比。结果]聚合级乳酸中的残糖含量在不高于0．1g／L时，5种氨基酸浓度要低于0．05g／L,蛋白质浓度低于O．20g／L，铁浓度低于0．005g/L。陶瓷膜透析液品质基本优于原工艺絮凝脱色液的品质。结论]陶瓷膜工艺可行，可以替代碱化与絮凝工艺。

Application of Ceramic Membrane in the Purification Technology of L-lactic Acid

Objective] The aim was to use ceramic membrane in the extraction of heatable L-lactic acid.Method] The heat stability's influencing factors of heatable L-lactic acid were studied and the physicochemical indices of filtrate by ceramic membrane and flocculation were compared.Result] The results showed that the concentration of glucose in heatable L-lactic acid should be less than 0.1 g/L,the concentration of amino acid should be less than 0.05 g/L,the concentration of protein should be less than 0.20 g/L,t...