Abstract:

Quinoline insoluble (QI) is an important value for quality control of coal tar.The refined coal tar pitch for needle coke is required with QI<0.1%,however the allowable error in the existing GB/T 2293—2008 is less than 0.8%,obviously not suitable for needle coke.According to the solubility of compound and the diversity of testing solvent,aqueous solution can be used in replacement of acetone solution during the analysis of refined coal tar pitch,which makes the QI measurement more accurate.