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    • 5. 发明授权
    • Removal of caprolactam and oligomers thereof from nylon granules
containing same
    • 从含有它们的尼龙颗粒中除去己内酰胺及其低聚物
    • US4816557A
    • 1989-03-28
    • US167250
    • 1988-03-11
    • Gunter PipperClaus Cordes
    • Gunter PipperClaus Cordes
    • C08G69/16C08G69/46
    • C08G69/46
    • Caprolactam and oligomers thereof are removed from nylon granules containing same in a process wherein(a) nylon granules are introduced at not less than 100.degree. C. at the top of a substantially upright treatment zone,(b) nylon granules are passed downward through the treatment zone while being heated to from 130.degree. to 210.degree. C.,(c) superheated steam is passed at from 130.degree. to 210.degree. C. upward through the treatment zone,(d) dry nylon granules are withdrawn at the bottom end of the treatment zone and steam containing caprolactam and oligomers thereof is withdrawn at the top of the treatment zone,(e) the caprolactam and oligomers thereof containing steam thus obtained is passed through a column giving an aqueous solution of caprolactam and oligomers thereof as bottom product and virtually caprolactam-free steam as overhead product.
    • 在其中(a)尼龙颗粒在基本上直立的处理区的顶部不低于100℃引入尼龙颗粒的过程中,己内酰胺及其低聚物从含有其的尼龙颗粒中除去,(b)尼龙颗粒向下通过 处理区,同时加热至130℃至210℃,(c)过热蒸汽从130℃升至210℃,向上通过处理区,(d)干燥的尼龙颗粒在 处理区和含有己内酰胺及其低聚物的蒸汽在处理区的顶部排出,(e)将含有这样得到的蒸汽的己内酰胺及其低聚物通过柱,得到己内酰胺及其低聚物的水溶液作为底部产物, 实际上无己内酰胺的蒸汽作为塔顶产品。
    • 8. 发明授权
    • Continuous production of low molecular weight polyamides
    • 连续生产低分子量聚酰胺
    • US5674973A
    • 1997-10-07
    • US578703
    • 1995-12-28
    • Gunter PipperAndreas KleinkePeter Hildenbrand
    • Gunter PipperAndreas KleinkePeter Hildenbrand
    • C08G69/14B01J19/28C08G69/04C08G69/16C08G69/46C08G69/26C08G69/28
    • C08G69/16C08G69/04
    • A process for the continuous production of polyamides from a mixture of at least one lactam and water and, if required, other monomer units and/or conventional additives and fillers under polyamide-forming conditions, where the mixture of the starting materials is heated in liquid phase in a first reaction zone until a conversion of at least 70% is reached, and undergoes adiabatic decompression and further polymerization in another reaction zone, wherein, in the first reaction zone, 0.5-7% by weight of water are employed, the temperature is increased to the range from 220.degree. to 310.degree. C., and polymerization is carried out until a conversion of at least 85% is reached and, in the second reaction zone, after the decompression further polymerization is carried out in the range from 215.degree. to 300.degree. C. without heat input.
    • PCT No.PCT / EP94 / 01998 Sec。 371日期1995年12月28日第 102(e)1995年12月28日PCT PCT 1994年6月20日PCT公布。 第WO95 / 01389号公报 日期1995年1月12日一种在聚酰胺形成条件下从至少一种内酰胺和水的混合物以及如果需要的话其它单体单元和/或常规添加剂和填料连续生产聚酰胺的方法,其中起始 材料在液相中在第一反应区中加热直到达到至少70%的转化率,并在另一个反应区进行绝热减压和进一步聚合,其中在第一反应区中为0.5-7重量%的水 ,温度升高到220℃至310℃,进行聚合直至达到至少85%的转化率,并且在第二反应区中,在进一步聚合进行进一步的聚合之后 在215〜300℃的范围内,无需热量输入。