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pp.753-759
In physical and reactive extraction of acrylic acid using various solvents the equilibrium characteristics of extraction were investigated.
The degree of extraction in reactive extraction with Tri-n-octylamine(TOA) was 1.5∼3 times than that in physical extraction. Distribution ratio was constant in methyl isobutyl ketone(MIBK) and n-butylacetate(n-BAc) but was increased with increasing the concentration of acrylic acid in benzene and chloroform. It can be explained by formation of dimers.
Maximum extraction loadings of acrylic acid were three in benzene and were two in MIBK, chloroform and n-BAc, and it was found that acrylic acid was extracted as the form of A_3R in benzene and A_2R in MIBK, chloroform and n-BAc. In effect of solvent, the degree of extraction was increased as the difference of solubility parameter of solvent and solute was decreased, and as dielectric constant of solvent was increased.
