| 摘要 |
<p>PURPOSE: A refining process of organic solvents is provided to reduce loss of propylene glycol monomethyl ether acetate and to improve purity. CONSTITUTION: A refining process of organic solvents comprises the following stages: preparing organic solvent mixture including propylene glycol monomethyl ether acetate and cyclohexanone; and removing the cyclohexanone after adding glycol to the organic solvent mixture and performing reaction. The glycol compound is represented by chemical formula 1. In the chemical formula 1, R1 and R2 are independently selected from C0-12 alkyl group or aryl group. 0.1-2 wt% of the glycol compound is included based on the organic solvent mixture.</p> |
