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公开(公告)号：US06509439B1
公开(公告)日：2003-01-21
申请号：US09549330
申请日：2000-04-14
IPC分类号： C08G6900
摘要： A process for producing polyamides from dinitriles and diamines in a continuous reaction using subsequent heating steps. In particular, the process involves contacting a dinitrile, a diamine, water, and optionally a catalyst to form a reaction mixture; heating the reaction mixture to a first elevated temperature of between about 180 to about 240° C., maintaining said temperature for about 0.10 to about 20 hours, and optionally controlling the pressure in this heating step by venting; heating the reaction mixture to a second elevated temperature of between about 250 to about 350° C., adding water to the reaction mixture before or after the second elevated temperature is reached, maintaining the pressure in the second heating step above atmospheric pressure by venting at least some of the water, and maintaining the second elevated temperature for a period of about 0.10 to about 10 hours; and recovering the polyamide.
摘要翻译： 使用随后的加热步骤在连续反应中由二腈和二胺生产聚酰胺的方法。 特别地，该方法包括使二腈，二胺，水和任选的催化剂接触以形成反应混合物; 将反应混合物加热至约180至约240℃的第一升高温度，将所述温度保持约0.10至约20小时，并且可选地通过排气控制该加热步骤中的压力; 将反应混合物加热至约250至约350℃的第二升高温度，在达到第二升高温度之前或之后向反应混合物中加入水，将第二加热步骤中的压力通过排气在 至少一些水，并保持第二升高温度约0.10至约10小时; 并回收聚酰胺。
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2.发明授权Process for the hydrolysis of adiponitrile and the production of nylon 6,6 using dicarboxylic acids as the sole catalyst 有权己二腈的水解方法和使用二羧酸作为唯一催化剂生产尼龙6,6的方法
公开(公告)号：US6075117A
公开(公告)日：2000-06-13
申请号：US217798
申请日：1998-12-21
摘要： A process for the hydrolysis of a dinitrile (e.g., adiponitrile) utilizing a dicarboxylic acid (e.g., adipic acid) as the sole catalyst followed by addition of a diamine (e.g., hexamethylenediamine) and heating to produce polymerization. Such a process is particularly usefull in the production of nylon 6,6 having a low BHMT content and improved melt stability.
摘要翻译： 使用二羧酸（例如己二酸）作为唯一催化剂水解二腈（例如己二腈）并随后加入二胺（例如六亚甲基二胺）并加热以产生聚合的方法。 这种方法在生产具有低BHMT含量和改进的熔体稳定性的尼龙6,6中是特别有用的。
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公开(公告)号：US6103863A
公开(公告)日：2000-08-15
申请号：US217797
申请日：1998-12-22
摘要： A two-step process for the production of polyamides from .alpha.,.omega.-dinitriles and .alpha.,.omega.-diamines involving the catalytic hydrolysis of the .alpha.,.omega.-dinitrile by addition of water with simultaneous purging of the reactor (i.e., venting of ammonia and water vapor) in the first step followed by polymerization by addition of the .alpha.,.omega.-diamine to the hydrolysate in the second step. Such a process is particularly useful in the production of poly(hexamethylene adipamide), i.e., nylon 6,6, from adiponitrile and hexamethylene diamine using lower catalyst levels during hydrolysis and resulting in reduced levels of bis(hexamethylene)triamine, BHMT, in the polymer.
摘要翻译： 用于从α，ω-二腈和α，ω-二胺生产聚酰胺的两步法，其涉及通过加入水同时净化反应器来催化水解α，ω-二腈（即，排出氨和 水蒸气），然后通过在第二步中向水解产物中加入α，ω-二胺进行聚合。 这样的方法特别可用于在水解期间使用较低催化剂水平从己二腈和六亚甲基二胺生产聚（己二酰己二胺），即尼龙6,6，并导致双（六亚甲基）三胺BHMT的水平降低 聚合物。
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