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    Integrated process for preparing dialkyl carbonates and diols
    1.
    发明授权
    Integrated process for preparing dialkyl carbonates and diols 失效
    用于制备碳酸二烷基酯和二醇的一体化方法

    公开(公告)号：US06407279B1

    公开(公告)日：2002-06-18

    申请号：US09444231

    申请日：1999-11-19

    申请人： J. Scott Buchanan ,  Zhaozhong Jiang ,  Jocelyn A. Kowalski ,  Jose G. Santiesteban

    发明人： J. Scott Buchanan ,  Zhaozhong Jiang ,  Jocelyn A. Kowalski ,  Jose G. Santiesteban

    IPC分类号： C07C6996

    CPC分类号： C07C68/065 ,  C07C29/1285 ,  Y02P20/125 ,  C07C69/96 ,  C07C31/202

    摘要： An integrated process for the production of a dialkyl carbonate and a diol from an alkylene oxide, carbon dioxide and an aliphatic monohydric alcohol is described in which an alkylene oxide is first reacted with carbon dioxide in the presence of a carbonation catalyst to provide a corresponding cyclic carbonate and impurities and the cyclic carbonate, which contains the impurities, is then reacted with an aliphatic monohydric alcohol in the presence of a transesterification catalyst to provide a corresponding dialkyl carbonate and diol.

    摘要翻译： 描述了一种用于从烯化氧，二氧化碳和脂族一元醇生产碳酸二烷基酯和二醇的综合方法，其中烯化氧首先在碳酸化催化剂存在下与二氧化碳反应以提供相应的环状 然后将含有杂质的环状碳酸酯与脂肪族一元醇在酯交换催化剂存在下反应，得到相应的碳酸二烷基酯和二醇。

    Co-production of dialkyl carbonates and diols with treatment of hydroxy alkyl carbonate
    3.
    发明授权
    Co-production of dialkyl carbonates and diols with treatment of hydroxy alkyl carbonate 失效
    与碳酸二烷基酯和二醇共同生产碳酸羟基烷基酯

    公开(公告)号：US06573396B2

    公开(公告)日：2003-06-03

    申请号：US09976608

    申请日：2001-10-12

    申请人： J. Scott Buchanan ,  Jose G. Santiesteban ,  Zhaozhong Jiang

    发明人： J. Scott Buchanan ,  Jose G. Santiesteban ,  Zhaozhong Jiang

    IPC分类号： C07C6996

    CPC分类号： C07C68/065 ,  Y02P20/127 ,  C07C69/96

    摘要： A process for the production of a dialkyl carbonate and a diol from a cyclic carbonate and an aliphatic monohydric alcohol wherein the cyclic carbonate and aliphatic monohydric alcohol are reacted in the presence of a transesterification catalyst to form a crude product stream which contains a dialkyl carbonate, a diol, a hydroxy alkyl carbonate, which is formed as an intermediate of the two step transesterification reaction, unreacted aliphatic monohydric alcohol and unreacted cyclic carbonate. The dialkyl carbonate and unreacted aliphatic monohydric alcohol are separated from the crude product stream and then the hydroxy alkyl carbonate is diminished, reduced or eliminated from the crude product stream, prior to the separation and purification steps needed to recover the diol, resulting in improved yields and product purity.

    摘要翻译： 一种由环状碳酸酯和脂族一元醇生产碳酸二烷基酯和二醇的方法，其中环状碳酸酯和脂肪族一元醇在酯交换催化剂的存在下反应，形成含有碳酸二烷基酯的粗产物流， 作为两步酯交换反应的中间体形成的二醇，羟基烷基碳酸酯，未反应的脂肪族一元醇和未反应的环状碳酸酯。 将碳酸二烷基酯和未反应的脂肪族一元醇与粗产物流分离，然后在回收二醇所需的分离和纯化步骤之前，从粗产物流中减少，还原或消除羟基烷基碳酸酯，从而提高产率 和产品纯度。