| 摘要 |
<p>PURPOSE:To thermally decompose thermoplatics stably and effectively without causing any slugging phenomenon by contacting the thermoplastics with a fluidized layer consisting of heated specific solid particles. CONSTITUTION:Heat-resistant porous spherical substances, having a fine pore volume of 0.2-1.5cm<2>1g, a specific surface area of 5-1,500m<2>/g, a bulk density of 0.3-1.5g/cm<3>, and a weight average diameter of 0.025-0.5mm., (e.g., fine porous alumina particles by a particle circulation method, silica-alumina catalyst for fluidized catalytic decomposition by internal heating method, etc.) are used solid perticles for forming a fluidized layer. As a gas for fluidization in the thermal decomposition process, a gas containing oxygen in an amount anough to only a part of thermoplastics to be treated is preferably used. The thermal decomposition can be more effectively performed by a particle circulation method.</p> |
