Wang Kang, Chang Zhidong, Ma Yinchen, Lei Chao, Wang Jing, Zhu Tingyu, Liu Huizhou, Zuo Yanjun, Li Xin
Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
Bioresour Technol. 2009 Jun;100(11):2878-82. doi: 10.1016/j.biortech.2008.12.056. Epub 2009 Feb 6.
The potential of recovering propionic acid from discharged water in vitamin B(12) production by anaerobic fermentation was investigated in this paper. A primary amine, N(1923), was used as the extractant, kerosene as diluter and n-octanol as modifier. The influences of the content of N(1923) in the organic phase, the phase ratio and the pH of aqueous phase on the extraction yield of propionic acid were studied. The organic phase composition with the volume ratio was proposed of N(1923):kerosene:n-octanol as 45:35:20. Under conditions of the phase ratio (o/w) as 1:4, the pH of aqueous phase of 3.0 and after 5 min extraction, the extraction yield of propionic acid can be over 97%.
本文研究了通过厌氧发酵从维生素B₁₂生产排放水中回收丙酸的潜力。使用伯胺N(1923)作为萃取剂，煤油作为稀释剂，正辛醇作为改性剂。研究了有机相中N(1923)的含量、相比和水相pH值对丙酸萃取率的影响。提出了有机相组成的体积比为N(1923):煤油:正辛醇为45:35:20。在相比（油/水）为1:4、水相pH值为3.0且萃取5分钟的条件下，丙酸的萃取率可超过97%。
