专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06245907B1 Process for producing a high purity caprolactam 有权
标题翻译：生产高纯度己内酰胺的方法
公开(公告)号：US06245907B1
公开(公告)日：2001-06-12
申请号：US09205900
申请日：1998-12-04
申请人： Myung Suk Suh , Seung Eon Park , Chang Hwang Lee , Myeong Hong Lee , Si Geun Lee , Jung Ho Kim
发明人： Myung Suk Suh , Seung Eon Park , Chang Hwang Lee , Myeong Hong Lee , Si Geun Lee , Jung Ho Kim
IPC分类号： C07D20104
CPC分类号： C07D201/04 , C07D223/10
摘要： Disclosed is a process for producing a high purity caprolactam which comprises converting cyclohexene obtained by the partial hydrogenation of benzene into cyclohexanol through hydration, converting the cyclohexanol into cyclohexanone through dehydrogenation, converting the cyclohexanone into cyclohexanone oxime through oximation and converting the cyclohexanone oxime into caprolactam through the Beckman rearrangement, characterized by comprising isolating and purifying the methylcyclopentanol from the cyclohexanol prior to use of such cyclohexanol in dehydrogenation and feeding the isolated methylcyclopentanol directly to oximation in order that the methylcyclopentanol is not fed to dehydrogenation. The process of the invention advantageously provides an economic method for producing a caprolactam with greater purity.
摘要翻译：公开了一种生产高纯度己内酰胺的方法，其包括将通过水合将苯部分氢化得到的环己烯转化为环己醇，通过脱氢将环己醇转化为环己酮，通过肟化将环己酮转化为环己酮肟，并将环己酮肟转化为己内酰胺，贝克曼重排，其特征在于包括在脱氢中使用这种环己醇之前从环己醇中分离和纯化甲基环戊醇，并将分离的甲基环戊醇直接进料到肟化中，以使甲基环戊醇不进行脱氢。本发明的方法有利地提供了一种制备更高纯度的己内酰胺的经济方法。

2. 发明授权

US5442037A Polyester prepolymer showing shape-memory effect 失效
标题翻译：聚酯预聚物显示形状记忆效应
公开(公告)号：US5442037A
公开(公告)日：1995-08-15
申请号：US301766
申请日：1994-09-07
申请人： Chang-Hwang Lee , Jae-Yeon Hwang , Byeong-Seok Chae
发明人： Chang-Hwang Lee , Jae-Yeon Hwang , Byeong-Seok Chae
IPC分类号： C08G63/52 , C08G63/676 , C08L67/07 , C08G63/66
CPC分类号： C08G63/676 , C08G63/52 , C08L67/07
摘要： A shape-memory polyester prepolymer is prepared with at least one kind of dicarboxylic acid component and at least one kind of diol, triol or polyol component in such a way to have unsaturated end group, wherein the dicarboxylic acid component comprises aromatic dicarboxylic acid in an amount of not less than 80% by mole based on the total mole of the dicarboxylic acid component; the diol component comprises a diol containing 2-10 carbon atoms in an amount of not less than 80% by mole based on the total mole of the diol component; a repeating unit of the ester bond ranging in number from 2 to 50; and the end group has crosslinkable, ethylenically unsaturated bond. The prepolymer shows particularly excellent heat resistance and excellent chemical resistance and also exhibits excellent transparency. The prepolymer can be used in a variety of reversible or irreversible purposes, such as pipe coupling, external laminate of pipe, protection ring, O-ring, gap stopper, orthodontic wire, artificial muscles and the like.
摘要翻译：形状记忆聚酯预聚物以至少一种二羧酸组分和至少一种二醇，三醇或多元醇组分以具有不饱和端基的方式制备，其中二羧酸组分包括芳族二羧酸相对于二羧酸成分的总摩尔量为80摩尔％以上的量; 二醇成分含有相对于二醇成分的总摩尔为80摩尔％以上的含有2-10个碳原子的二醇; 酯键的重复单元的数目为2至50; 并且端基具有可交联的烯属不饱和键。预聚物显示出特别优异的耐热性和优异的耐化学性，并且还表现出优异的透明性。预聚物可以用于各种可逆或不可逆的目的，例如管接头，管的外部层压板，保护环，O形环，间隙塞子，正畸线，人造肌肉等。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式