Dechlorination of PVC by a mechanochemical treatment under atmospheric condition
Dechlorination of PVC by a mechanochemical treatment under atmospheric condition
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常压条件下机械化学处理PVC脱氯
DOI：
10.4164/sptj.36.468
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发表时间：
1999
影响因子：
--
通讯作者：
S. Masuda
中科院分区：
文献类型：
--
作者：
Qiwu Zhang;F. Saito;Kaoru Shimme;S. Masuda
开发了聚氯乙烯(PVC)的常温脱氯工艺。该工艺采用机械力化学(MC)处理PVC和CaO混合物，然后用水洗涤混合物。用行星式磨机和一种新型磨机TS型MC反应器处理PVC和CaO之间的MC反应，将PVC转化为聚乙烯和Cauchl。前者基本上不溶于水，而后者溶解。在聚氯乙烯中加入过量的CaO可以加速反应，使行星磨处理MC的脱氯率在120min内达到95%以上。在TS型MC反应器上进行的放大试验也取得了令人满意的结果，10h脱氯率可达90%以上。因此，在常压条件下用CaO对聚氯乙烯进行MC处理，在脱氯工艺的实际应用中具有广阔的应用前景。
Room-temperature dechlorination process for polyvinyl chloride (PVC) has been developed. The process employs a mechanochemical (MC) treatment of PVC and CaO mixture followed by washing of mixture with water. MC reaction between PVC and CaO was induced by the treatments with a planetary mill and a new type of mill named TS-type MC reactor, which converted PVC into polyethylene and CaOHCl. The former product essentially remains undissolved in water while the latter dissolves. Addition of excess CaO to PVC accelerates the reaction and enhances the yield of dechlorination to over 95% within 120 minutes for the MC treatment with planetary mill. A scale-up test with a TS-type MC reactor also gave promising results of dechlorination yield over 90% for 10 hours. Therefore the MC treatment of PVC with CaO under atmospheric condition would be promising in the practical application of dechlorination process.