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    • 10. 发明公开
    • Process for converting scrap to PET 4-aminomethyl benzoic acid
    • 将PET刮刀转换为DIAMINE MONOMERS的工艺
    • EP0365842A3
    • 1991-09-11
    • EP89117668.7
    • 1989-09-25
    • GENERAL ELECTRIC COMPANY
    • Blackmon, Kenneth PaulFox, Daniel WayneShafer, Sheldon Jay
    • C07C209/44C07C231/02C07C253/20
    • C07C209/48C07C227/04C07C231/02C07C253/20C07C253/30C07C2601/14C07C29/00C07C31/202C07C233/65C07C255/51C07C255/60C07C255/57C07C229/34C07C211/27C07C211/25
    • Scrap poly(ethyleneterephthalate) is converted to useful amine and diamine monomers such as para-xylylenediamine, 1,4-bis(aminomethyl)cyclo­hexane and 4-aminomethyl benzoic acid for the production of various polyamides. The conversion of poly(ethyleneterephthalate) to diamine monomers is achieved by a three step process involving (a) ammonolysis of the poly(ethyleneterephthalate) to produce terephthalamide and ethylene glycol; (b) pyrolytic dehydration of the terephthalamide to produce terephthalonitrile; and (c) hydrogenation of the terephthalonitrile to produce the para-xylylene diamine and/or 1,4-bis(aminomethyl)cyclohexane. The conversion of poly(ethyleneterephthalate) to 4-aminomethyl benzoic acid involves the steps of (a) ammonolysis of the poly(ethyleneterephthalate) to produce terephthalamide; (b) partial pyrolytic dehydration of said terephthalamide to produce 4-cyanobenzoic acid; and (c) hydrogenation of said 4-cyanobenzoic acid to produce 4-aminomethylbenzoic acid. The process of the present invention permits the conversion of low value PET scrap such as beverage bottles, fibers and film to relatively high value and relatively pure diamine monomers and ethylene glycol.
    • 将聚(对苯二甲酸乙二醇酯)废料转化为有用的胺和二胺单体如对苯二甲胺,1,4-双(氨基甲基)环己烷和4-氨基甲基苯甲酸,用于生产各种聚酰胺。 聚(对苯二甲酸乙二醇酯)向二胺单体的转化通过三步法实现,其包括(a)聚对苯二甲酸乙二醇酯的氨解产生对苯二甲酰胺和乙二醇; (b)对苯二甲酰胺的热解脱水产生对苯二腈; 和(c)对苯二腈的氢化以产生对二甲苯二胺和/或1,4-双(氨基甲基)环己烷。 聚(对苯二甲酸乙二醇酯)向4-氨基甲基苯甲酸的转化涉及以下步骤:(a)聚对苯二甲酸乙二醇酯的氨解产生对苯二酰胺; (b)部分热解脱水所述对苯二酰胺以产生4-氰基苯甲酸; 和(c)氢化所述4-氰基苯甲酸以产生4-氨基甲基苯甲酸。 本发明的方法允许将低价值PET废料如饮料瓶,纤维和膜转化成相对高的值和相对纯的二胺单体和乙二醇。