生物油中络合萃取乙酸的研究

Extracting Acetic Acid from Bio-Oil Using TOA

采用三正辛胺(TOA)作为络合剂,异辛醇和煤油分别作为助溶剂和稀释剂,对生物油中的乙酸进行了络合萃取研究。考察了TOA体积分数、异辛醇浓度、萃取剂与生物油轻馏分体积比以及温度对乙酸萃取率的影响,结果表明:温度为0℃,萃取体系为40%TOA+40%异辛醇+20%煤油(各组分浓度均为体积分数,下同),萃取剂与生物油轻馏分体积比为3∶1时,乙酸的一次萃取率较高,可达74.6%。

Complexation extraction with trioctylamine （TOA） as solvent for the recovery of acetic acid from bio-oil was studied. The effects of TOA concentration, iso-octyl alcohol concentration, volume ratio of extractant/distillate and temperature on extraction efficiency were examined. Experimental results indicated that the extraction efficiency was the highest with 40% TOA＋40% iso-octyl alcohol＋20% kerosene and 3∶1 volume ratio of extractant/distillate at the temperature of 0 ℃. And an extraction efficiency of 74.6% for acetic acid was achieved in a single-equilibrium-stage extraction under this optimal condition.