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1. 发明授权

US5693862A Process for transport of toluenediamine 失效
标题翻译：甲苯二胺的运输方法
公开(公告)号：US5693862A
公开(公告)日：1997-12-02
申请号：US769255
申请日：1996-12-18
申请人： Majid Keyvani , Rekha Menon , James L. Meyer , Thomas W. Offill
发明人： Majid Keyvani , Rekha Menon , James L. Meyer , Thomas W. Offill
IPC分类号： C07C209/90
CPC分类号： C07C209/90
摘要： The present invention is directed to a process for transporting toluenediamine (TDA) from a first site to a second site. The process of the invention comprises the steps of (a) providing a molten mass of TDA isomers at the first site; (b) cooling the molten mass to a temperature below the melting point, the molten mass thereby forming flowable particles of solid TDA in an inert gas; (c) providing an airtight storage vessel lined with a chemically inert liner; (d) storing the flowable particles of solid TDA in the lined storage vessel; (e) charging the storage vessel with inert gas; (f) transporting the storage vessel from the first site to the second site; and (g) remelting the TDA flowable particles in inert gas with TDA liquid that is superheated above the melting point to produce a molten TDA isomer mixture in inert gas having substantially the same isomer ratio as that of the molten mass. Also disclosed is a process for storing TDA in a cost-effective manner while reducing the likelihood of TDA degradation during storage, relative to conventional TDA storage methods.
摘要翻译：本发明涉及将甲苯二胺（TDA）从第一部位输送至第二部位的方法。本发明的方法包括以下步骤：（a）在第一个位置提供一种TDA异构体的熔融物质; （b）将熔融物料冷却到低于熔点的温度，从而在惰性气体中形成固体TDA的可流动颗粒; （c）提供衬有化学惰性衬垫的密封储存容器; （d）将固体TDA的可流动颗粒储存在衬里的储存容器中; （e）用惰性气体对储存容器充电; （f）将储存容器从第一地点运送至第二地点; 和（g）将TDA可流动颗粒与过熔度高于熔点的TDA液体在惰性气体中重熔，以产生与熔融物质具有基本相同异构体比例的惰性气体中的熔融TDA异构体混合物。还公开了相对于传统的TDA存储方法，在降低存储期间TDA劣化的可能性的同时以成本有效的方式存储TDA的过程。

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