生物粗甘油精制研究

Purification of bio-crude glycerol

为了有效判定原料粗甘油品质,采用不同来源粗甘油模拟生产运行,针对加碱皂化和活性炭种类对精甘油热试后色度及起泡性的影响进行了研究。结果表明:加碱皂化后,精甘油热试后色度由15增加至60,而不加碱皂化精甘油热试后色度由15增加至200多;活性炭种类对精甘油色度影响较大,热试后色度最好为170,最差为500多;活性炭种类对起泡性精甘油的消泡时间影响更大,消泡时间最短为7 s,最长超过600 s。热试指标合格的精甘油可以适用于医用级,起泡性指标合格的精甘油适用于工业级。

In order to effectively determine crude glycerol quality, crude glycerols from different sources were adopted to simulate production. The effects of alkali saponification and activated carbon type on hot test chroma and foamability of pure glycerol were studied. The results showed that after the alkali saponi- fication, the hot test chroma of pure glycerol increased from 15 to 60, while the hot test chroma of pure glycerol without alkali saponification increased from 15 to above 200. The activated carbon type had a great influence on the chroma of pure glycerol, after hot test, the best chroma was 170, while the worst chroma was above 500. The activated carbon type had larger influence on the defoaming time of pure glycerol with foamability. The shortest defoaming time was 7 s, while the longest defoaming time was over 600 s. Qualified hot test indicator pure glycerol could be applied as medical grade, and qualified foam- ability indicator pure glycerol could be applied as industrial grade.