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1. 发明授权

US5012019A Process for purifying aromatic nitration products 失效
标题翻译：净化芳香硝化产物的方法
公开(公告)号：US5012019A
公开(公告)日：1991-04-30
申请号：US449259
申请日：1990-01-26
申请人： Robert W. Mason , Peter C. Imm , Paul J. Craney , Thomas W. Offill , Robert T. Brooker
发明人： Robert W. Mason , Peter C. Imm , Paul J. Craney , Thomas W. Offill , Robert T. Brooker
IPC分类号： C07C201/16
CPC分类号： C07C201/16
摘要： The present invention relates to a process for purifying an aromatic nitration product mixture comprising a nitrated aromatic compound, water, and nitric or sulfuric acid which comprises without regard to sequence: (a) removing at least a portion of said water from said product mixture by contacting and reacting said water in said mixture with magnesium nitrate trihydrate to form magnesium nitrate pentahydrate or magnesium nitrate hexahydrate and removing said magnesium nitrate pentahydrate or magnesium nitrate hexahydrate from said nitrated aromatic compound in said product mixture, and (b) removing at least a portion of said acid from said product mixture by contacting and reacting said acid with an ionic or non-ionic absorbent to form a reacted absorbent and removing said reacted absorbent from said nitrated aromatic compound in said product mixture.
摘要翻译：本发明涉及一种纯化芳族硝化产物混合物的方法，其包括硝化芳族化合物，水和硝酸或硫酸，其不包括以下顺序：（a）通过以下步骤从所述产物混合物中除去至少一部分所述水：使所述混合物中的所述水与硝酸镁三水合物接触和反应以形成硝酸镁五水合物或硝酸镁六水合物，并从所述产物混合物中的硝化芳族化合物中除去所述五水合硝酸镁或硝酸镁六水合物，和（b）除去至少一部分的所述酸从所述产物混合物中通过使所述酸与离子或非离子吸收剂接触和反应以形成反应的吸收剂并从所述产物混合物中的所述硝化芳族化合物中除去所述反应的吸收剂。

2. 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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