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CN101544438A 一种黄姜皂素工业废酸液的回用方法 无效 - 撤回

一种黄姜皂素工业废酸液的回用方法
摘要：
本发明提供了一种黄姜皂素工业废酸液的回用方法。该方法将黄姜酸水解工艺中产生的废酸液，首先采用真空减压浓缩的方式来提高废酸液中氢离子的当量浓度，然后加入自行复配而成的复合澄清剂，絮凝沉淀去除废酸液中的部分COD，最后取该浓缩并絮凝处理的废酸液，补加少量纯的浓硫酸后，直接回用于黄姜酸水解工艺中。采用该方法皂素的最终得率接近于纯硫酸水解时的得率。
摘要（英）：

The invention provides a method for reusing yellow-ginger saponin industrial waste acid solution. For the waste acid solution generated in a yellow-ginger acid hydrolysis process, the method comprises the steps of adopting a vacuum reduced-pressure concentration mode to increase the equivalent concentration of hydrogen ions in the waste acid solution, adding composite clarifying agent obtained through compounding per se to the waste acid solution, removing part of COD in the waste acid solution through flocculation and precipitation, adding a small amount of pure concentrated sulfuric acid to the waste acid solution subjected to concentration and flocculation and directly reusing the waste acid solution in the yellow-ginger acid hydrolysis process. By adopting the method, the final yield of saponin is close to the yield in pure sulfuric acid hydrolysis.

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