METHOD FOR DECOMPOSING WATER-SOLUBLE POLYMER, METHOD FOR RECYCLING THE SAME AND METHOD FOR ORGANIC SYNTHESIS USING SUPERCRITICAL WATER OR SUBCRITICAL WATER AS REACTION SOLVENT

摘要

PROBLEM TO BE SOLVED: To recover an industrially useful organic compound by decomposing a polyvinyl alcohol discharged to the environment under the present situation. SOLUTION: A polyvinyl alcohol is decomposed by using critical water or subcritical water at 200-450 deg.C under 4-45 MPa to recover benzaldehyde, acetophenone or benzophenone being an industrially useful organic compound.