膜过滤生产食品级浓缩大豆磷脂过程中膜污染清洗方法

Removal of Membrane Contamination in the Process of Preparating Food Grade Soy Lecithin by Inorganic Membrane Micro-Filtration

DOI：

中文关键词: 膜污染 膜微滤 食品级浓缩磷脂

英文关键词: membrane fouling membrane micro-filtration food grade soy concentrated lecithin

基金项目:国家“十一五”科技支撑计划项目(2006BAD05A08)

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中文摘要:

研究了膜法制备食品级浓缩磷脂过程中膜污染的清洗问题。实验研究了生产过程中正己烷溶剂溶清洗及重度污染后NaOH溶液清洗对无机膜的膜通量、产品丙酮不溶物含量的影响。实验结果表明,过滤过程中适时地用含水率低的正己烷清洗系统可较理想的延缓膜污染。对于重度膜污染,采用2g/dLNaOH溶液80℃清洗2h后用清水冲洗可使膜通量达到最优水平,产品丙酮不溶物含量超过质量分数60%。

英文摘要:

This manuscript is to study the membrane contamination removal technology process in the process of preparating food grade soy lecithin by inorganic membrane micro-filtration.Through comparing the effect of n-hexane washing and NaOH solution washing on membrane fiux and the acetone insoluble content,it was found that n-hexane with low moisture efficient delay the membrane fouling,and the highest membrane flux can be acquired with washing by 2 g/dL NaOH solution in 80℃ and 2 hours.The acetone insoluble content also arrived at the highest value (more than 60%).

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