Extraction technology for recovery of gallic acid from gallic acid mother liquor

doi:10.3969/j.issn.0438-1157.2013.05.022

Abstract

Abstract: A feasible extraction technology is investigated to recover gallic acid from gallic acid mother liquor.It is confirmed that methyl isobutyl ketone(MIBK)is a proper extractant.The influences of initial pH value, gallic acid concentration and phase ratio on extraction efficiency of MIBK are studied in detail.The results show that the pH value of extraction raffinate should be controlled to be less than 2.5 in the extraction process and at about 8 in the stripping process.The extraction rate is improved by increasing the phase ratio.The gallic acid concentration has no obvious effect on the extraction balance in both extraction and stripping processes.The multistage extraction rate reaches 95% at the phase ratio of 1 and the initial pH value of wastewater lower than 2.5.

Key words: methyl isobutyl ketone, gallic acid, extraction, stripping

关键词: 甲基异丁基酮(MIBK), 没食子酸, 萃取, 反萃

CLC Number:

TQ202

YU Wei, ZHOU Kanggen, WU Yundong, DU Hu. Extraction technology for recovery of gallic acid from gallic acid mother liquor[J]. CIESC Journal, 2013, 64(5): 1660-1664.

喻薇, 周康根, 吴运东, 杜虎. 从没食子酸结晶母液中回收没食子酸的萃取工艺[J]. 化工学报, 2013, 64(5): 1660-1664.

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