METHOD FOR PURIFYING CONTAMINATED POLYPROPYLENE

• Main Authors: SCHONEMANN HANS, WILLIAMS KARA, LAYMAN JOHN MONCRIEF, GUNNERSON MAGGIE
• Format: Patent
• Language: Chinese; English
• Published: 16.03.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

A method for purifying reclaimed polypropylene, such as a polypropylene reclaimed from post-consumer use or post-industrial use, is disclosed. The method involves obtaining the reclaimed polypropyleneand contacting it at an elevated temperature and pressure with a fluid solvent to produce an extracted reclaimed polypropylene. The extracted reclaimed polypropylene is dissolved in a solvent at an elevated temperature and pressure to produce a polypropylene solution, which is purified at an elevated temperature and pressure by contacting the polypropylene solution with solid media to produce a purer polypropylene solution. A purer polypropylene is then separated from the purer polypropylene solution. 本文公开了种用于纯化回收的聚丙烯，诸如从消费后使用或工业后使用的回收的聚丙烯的方法。本方法涉及获得所述回收的聚丙烯和使其在高温和高压下与流体溶剂接触以产生提取的回收的聚丙烯。所述提取的回收的聚丙烯在高温和高压下溶解在溶剂中以产生聚丙烯溶液，所述聚丙烯溶液在高温和高压下通过使所述聚丙烯溶液与固体介质接触来纯化，以产生较纯的聚丙烯溶液。然后从所述较纯的聚丙烯溶液中分离较纯的聚丙烯。