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1. 发明授权

US6011131A Process for the preparation of polyamides 失效
标题翻译：制备聚酰胺的方法
公开(公告)号：US6011131A
公开(公告)日：2000-01-04
申请号：US81887
申请日：1998-05-19
申请人： Setsuo Sato , Hercules Peloggia , Tracy Hunt , Joerg Schwarzer , Ramiro Carielo Bueno , Roger A. Lovald
发明人： Setsuo Sato , Hercules Peloggia , Tracy Hunt , Joerg Schwarzer , Ramiro Carielo Bueno , Roger A. Lovald
IPC分类号： C08G69/34 , C08G73/10 , C08G69/26
CPC分类号： C08G69/34
摘要： Process for the preparation of polyamides comprising the steps of A) reacting a soybean oil condensate obtained from the deodorization of refined soybean oil and which contains less than 30% by weight of free and esterified oleic acid based on the total weight of free and esterified fatty acids in said condensate, with a C.sub.1-4 alkanol in the presence of a zinc oxide catalyst to convert free fatty acids and fatty acid glyceride esters to fatty acid C.sub.1-4 alkyl esters;B) removing excess C.sub.1-4 alkanol, volatile reaction by-products, water, and the zinc oxide catalyst from the resulting reaction mixture;C) heating the reaction mixture from step B) under vacuum to obtain a distillate of fatty acid C.sub.1-4 alkyl esters;D) separating the distillate from step C) into a fraction containing mostly C.sub.16-18 saturated fatty acid C.sub.1-4 alkyl esters and a second fraction containing mostly C.sub.16-18 unsaturated fatty acid C.sub.1-4 alkyl esters wherein the oleic acid C.sub.1-4 alkyl ester content is less than about 35% by weight thereof;E) dimerizing said second fraction in the presence of montmorillonite clay; andF) reacting the dimerized second fraction with a polyamine.
摘要翻译：制备聚酰胺的方法包括以下步骤：使得自精制大豆油的除臭得到的大豆油缩合物与游离和酯化脂肪的总重量相比含有少于30重量％的游离和酯化油酸所述缩合物中的酸与C 1-4烷醇在氧化锌催化剂存在下将游离脂肪酸和脂肪酸甘油酯转化为脂肪酸C 1-4烷基酯; B）从所得反应混合物中除去过量的C 1-4烷醇，挥发性反应副产物，水和氧化锌催化剂; C）在真空下加热来自步骤B）的反应混合物，得到脂肪酸C 1-4烷基酯的馏出物; D）将馏出物与步骤C）分离成大部分含有C16-18饱和脂肪酸C1-4烷基酯的馏分和主要含有C16-18不饱和脂肪酸C1-4烷基酯的第二馏分，其中油酸C 1-4烷基酯含量较少约35重量％以上; E）在蒙脱石粘土存在下将所述第二级分二聚化; 和F）使二聚第二级分与多胺反应。

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