| 摘要 |
<p>The process consists of (a) dissolving the polyolefins from the material to be treated, in a closed vessel under set conditions of pressure and temp., depending on the solvent used, which has been previously heated in a separate container; (b) filtering the soln. to separate the polyolefins from the residue; (c) sepg. the polyolefins and solvent by centrifuging; and (d) finally sepg. the solvent from the polyolefins by drying under vacuum.</p> |
