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8250089 
Journal Article 
Measurement and correlation of solubility of 2-(4-amylbenzoyl) benzoic acid in C6-C8 alkane 
Shi, XG; Guo, ZW; Yang, SH; Jin, HB 
2014 
No 
Huaxue Gongcheng / Chemical Engineering
ISSN: 1005-9954 
Editorial Office of Chemical Engineering (China) 
42 
6 
43-47 
Chinese 
2-(4-amylbenzoyl) benzoic acid (ABB acid )was an important intermediate to prepare 2-amylanthraquinone. It is the key process for 2-amylanthraquinone synthesis to separate pure ABB acid from reaction mixture with a simple and efficient approach. Linear equation between ABB acid mass concentration and peak areas was established by measuring the peak areas of ABB acid standard solutions with different density from 0.9×10-9 g/L to 21×10-9 g/L using LC. The solubility data measured at various temperatures by equilibria method were acquired when the ABB acid was dissolved in different systems (mixed solvent consist of o-dichlorobenzene and one kind of straight-chain paraffin from n-hexane, n-heptane and n-octane with different volume fraction from 0.750 to 0.875). The solubility of ABB acid in mixed solvents decreases with the volume fraction of straight chain alkanes increases, and decreases with decreasing temperature. The result shows that in terms of ABB acid segregation by adding straight chain alkanes, the temperature should be below 283.15 K, the volume fraction of straight-chain paraffin should be larger than 0.84, and n-hexane is the best choice. The experimental data were correlated by the λ-h equation, which were modified by a universal correction term. All results are the mean values of three test results. 
2-(4-amylbenzoyl) benzoic acids; Liquid-solid equilibrium; Solubility; Straight-chain paraffin/o-dichlorobenzene