Production of dialkyl (phenylenedioxy) diacetates
    3.
    发明授权
    Production of dialkyl (phenylenedioxy) diacetates 失效
    制备二烷基(亚苯二氧基)二乙酸酯

    公开(公告)号:US4922000A

    公开(公告)日:1990-05-01

    申请号:US247229

    申请日:1988-09-21

    IPC分类号: C07C67/31

    CPC分类号: C07C67/31

    摘要: Disclosed is a process for preparation of dialkyl (phenylenedioxy)acetates such as dimethyl (1,3-phenylenedioxy)acetate in high yield.The process involves controlling certain reaction conditions such as order of addition of reactants and rate of addition.

    摘要翻译: 公开了以高产率制备二((亚苯基二氧基)乙酸二烷基酯,如二甲基(1,3-亚苯基二氧基)乙酸酯)的方法。 该方法包括控制某些反应条件,例如反应物的加入顺序和加入速率。

    Process for preparing alkylsulfonic anhydrides
    5.
    发明授权
    Process for preparing alkylsulfonic anhydrides 失效
    烷基磺酸酐的制备方法

    公开(公告)号:US5292947A

    公开(公告)日:1994-03-08

    申请号:US952228

    申请日:1992-09-28

    CPC分类号: C07C303/22 C07C303/00

    摘要: This invention relates to a process for preparing an alkylsulfonic anhydride comprising contacting(A) a dehydrated phosphoric acid with(B) an alkylsulfonic acid having 1 to 6 carbon atoms, under conditions of temperature and pressure to result in the substituted absence of phosphoric/alkylsulfonic mixed anhydride and production of a mixture of alkylsulfonic acid and its corresponding anhydride at a conversion of at least 10% of alkylsulfonic acid to the corresponding alkylsulfonic anhydride.

    摘要翻译: 本发明涉及一种制备烷基磺酸酐的方法,其包括使(A)脱水磷酸与(B)具有1至6个碳原子的烷基磺酸在温度和压力条件下接触,导致不含磷酸/烷基磺酸 混合酸酐和烷基磺酸及其相应的酸酐的混合物的生产,其中烷基磺酸的至少10%转化成相应的烷基磺酸酐。