发明名称 PROCESSO PARA A RECUPERACAO DE ACIDO TEREFTALICO E DE ETILENOGLICOL A PARTIR DE DESPERDICIOS DE TEREFTALATO DE POLIETILENO
摘要 A subject of the invention is the method of recovery of terephthalic acid and ethylene glycol from poly/ethylene terephthalate/wastes. According to the invention poly/ethylene terephthalate/ is heated in an aqueous solution at the temperature from 150° C. to 280° C. with a reagent substance, chosen from the group, comprising bicarbonates of ammonia and alkali metals, ammonium carbamate and urea, which substances are used in amounts not less than a stoechiometric amount.
申请公布号 PT973715(E) 申请公布日期 2002.12.31
申请号 PT19970912409T 申请日期 1997.12.02
申请人 HEINRICH SMUDA 发明人 HEINRICH SMUDA
分类号 C07C51/487;C07C27/02;C07C29/09;C07C31/20;C07C51/09;C07C63/26;(IPC1-7):C07C51/09 主分类号 C07C51/487
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