| 摘要 |
<p>PROBLEM TO BE SOLVED: To advance decomposition reaction of a plastic such as plastic waste which attaches much importance to environment problem at a low temperature in a short time and high productivity by using a small amount of catalyst and liquefy the plastic to liquid-like material capable of ready treating at an ambient temperature in high productivity by pyrolyzing the plastic in the presence of a specific catalyst. SOLUTION: (B) A plastic such as polyethylene or polypropylene is pyrolyzed at 150-600 deg.C in the presence of (A) a catalyst obtained by adding a dealuminated zeolite (e.g. a proton exchange type Y type zeolite) to a solution containing distilled water in an amount of 1-10 times by weight and ethylenediamine tetraacetic acid in an amount of 0.1-1 times and allowing the mixture to stand for 10-200hr and dropping 1-3N hydrochloric acid in an amount of 0.5-3 times to the mixture and heating the mixture to 100 deg.C under stirring and stirring the mixture for 1-10hr at the same temperature and separating a solid phase by filtration or centrifugal separation and washing the solid material with water and baking the solid material in air or nitrogen atmosphere at 300-700 deg.C for 1-10hr. Furthermore, the component A is preferably used in an amount of 0.01-20wt.% based on the component B.</p> |
