| abstract |
More specifically, the present invention relates to a composition for preparing a concentrated, anhydrous alcohol having improved stability, which comprises an alcohol-free alcohol and an amine-based additive, and a method for concentrating alcohol- In order to concentrate the alcohol in the presence of an amine-based additive, it is possible to improve the thermal stability of alcohol-free alcohol so that the concentrating process can be efficiently operated at a high temperature, and at the same time, To a method for preventing degradation of UV transmittance and providing a high-quality alcohol-free alcohol at low cost and high efficiency. |