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    METHOD OF MAKING TRIMETHYLENE CARBONATE
    1.
    发明公开
    METHOD OF MAKING TRIMETHYLENE CARBONATE 审中-公开
    用于生产碳酸酯三亚甲基

    公开(公告)号：EP1456195A1

    公开(公告)日：2004-09-15

    申请号：EP02790100.8

    申请日：2002-12-12

    申请人： PPG Industries Ohio, Inc.

    发明人： BOWMAN, Mark, P. ,  KREUTZBERGER, Charles, B.

    IPC分类号： C07D319/06

    CPC分类号： C07D319/06 ,  Y02P20/584

    摘要： A method of synthesizing trimethylene carbonate, which includes the steps of reacting 1,3-propanediol and phosgene in vapor form, providing a combination of temperature and pressure at which trimethylene carbonate is in its vapor phase, providing a residence time sufficient to react 1,3-propanediol and phosgene to trimethylene carbonate, condensing the trimethylene carbonate vapors, and isolating the condensed trimethylene carbonate. The present method advantageously does not require the use of catalysts and the associated expense of recovering and/or recycling or disposing of catalyst residues.

    METHOD FOR PURIFYING CHLOROMETHYL CHLOROFORMATE
    6.
    发明公开
    METHOD FOR PURIFYING CHLOROMETHYL CHLOROFORMATE 审中-公开
    方法清洁氯甲酸氯甲酯

    公开(公告)号：EP1590316A1

    公开(公告)日：2005-11-02

    申请号：EP04707091.7

    申请日：2004-01-30

    申请人： PPG Industries Ohio, Inc.

    发明人： BOWMAN, Mark, P. ,  KREUTZBERGER, Charles, B.

    IPC分类号： C07C68/08 ,  C07C69/96

    CPC分类号： C07C68/08 ,  C07C69/96

    摘要： Describes a method for obtaining substantially pure chloromethyl chloroformate from a chloroformate mixture comprising chloromethyl chloroformate and methyl chloroformate by heating the chloroformate mixture in a reaction zone at temperatures ranging from at least 50 °C to the reflux temperature of the chloroformate mixture in the reaction zone while simultaneously removing volatile gaseous decomposition products from the reaction zone. Dichloromethyl chloroformate may also be present in the chloroformate mixture.