Process for the production of aryl carbonates
    31.
    发明授权
    Process for the production of aryl carbonates 失效
    制备芳基碳酸酯的方法

    公开(公告)号:US5527942A

    公开(公告)日:1996-06-18

    申请号:US306630

    申请日:1994-09-15

    CPC分类号: C07C68/02

    摘要: Carbonates with aromatic ester groups can be produced by reaction of aromatic monohydroxy compounds with phosgene or with chloroformic acid esters of aromatic monohydroxy compounds, working at a temperature in the range of 50.degree. to 350.degree. C. in presence of oxides of the metals of Group IV B of the Mendeleeff periodic table as heterogeneous catalysts.

    摘要翻译: 具有芳族酯基的碳酸酯可以通过芳族单羟基化合物与光气或芳族单羟基化合物的氯甲酸酯的反应来制备,在温度为50-350℃的温度下,在组的金属的氧化物存在下 Mendelée周期表的IV B作为非均相催化剂。

    Process for preparting aryl carbonates
    32.
    发明授权
    Process for preparting aryl carbonates 失效
    制备芳基碳酸酯的方法

    公开(公告)号:US5478961A

    公开(公告)日:1995-12-26

    申请号:US272797

    申请日:1994-07-11

    IPC分类号: C07B61/00 C07C68/02 C07C69/96

    CPC分类号: C07C68/02

    摘要: Carbonates with aromatic ester groups may be prepared by reacting aromatic monohydroxy compounds with phosgene or with chloroformates of aromatic monohydroxy compounds, wherein the process is performed at a temperature in the range 50.degree.-350.degree. C. in the presence of aluminosilicates as heterogeneous catalysts.

    摘要翻译: 具有芳族酯基的碳酸酯可以通过使芳族单羟基化合物与光气或芳族单羟基化合物的氯甲酸酯反应制备,其中该方法在铝硅酸盐作为非均相催化剂存在下,在50-350℃的温度下进行。

    Process for the preparation of polycarbonate
    36.
    发明授权
    Process for the preparation of polycarbonate 失效
    制备聚碳酸酯的方法

    公开(公告)号:US08173762B2

    公开(公告)日:2012-05-08

    申请号:US12829845

    申请日:2010-07-02

    IPC分类号: C08G64/00 C08G63/02

    CPC分类号: C08G64/307

    摘要: A combined process for the preparation of polycarbonate from bisphenols and diaryl carbonates, the monophenol liberated being reacted again for the preparation of the diaryl carbonate and the alkali metal halide forming in the preparation of the diaryl carbonate being converted by electrochemical oxidation, optionally over a gas diffusion electrode, into chlorine and alkali hydroxide solution, the chlorine being recycled into the preparation of the phosgene and the alkali hydroxide solution being recycled into the preparation of the diaryl carbonate.

    摘要翻译: 用于从双酚和碳酸二芳基酯制备聚碳酸酯的组合方法中,释放的单酚再次反应,用于制备碳酸二芳基酯和在制备碳酸二芳基酯时通过电化学氧化转化而形成的碱金属卤化物,任选地在气体 扩散电极,进入氯和碱性氢氧化物溶液中,氯被循环到光气的制备中,碱性氢氧化物溶液被循环到碳酸二芳基酯的制备中。

    METHOD FOR REDUCING THE CONTENT OF FLUORESCENT PARTICLES IN POLYCARBONATE
    40.
    发明申请
    METHOD FOR REDUCING THE CONTENT OF FLUORESCENT PARTICLES IN POLYCARBONATE 审中-公开
    降低聚碳酸酯中荧光颗粒含量的方法

    公开(公告)号:US20080200643A1

    公开(公告)日:2008-08-21

    申请号:US12032259

    申请日:2008-02-15

    IPC分类号: C08F6/28

    CPC分类号: C08G64/406

    摘要: A method for reducing the content of fluorescent particles in polycarbonate is disclosed. The method entails bringing into contact polycarbonate, in the melt or in solution, with aluminosilicate at a temperature and for a time calculated to obtain polycarbonate having fluorescent particles content of 0 to 5 counts/g of polycarbonate. In a preferred embodiment the polycarbonate is passed through a column packed with zeolite.

    摘要翻译: 公开了一种降低聚碳酸酯中荧光颗粒含量的方法。 该方法需要在熔体或溶液中与铝硅酸盐在温度和时间内接触聚碳酸酯,以获得具有0至5个/ g聚碳酸酯的荧光颗粒含量的聚碳酸酯。 在优选的实施方案中,聚碳酸酯通过填充有沸石的柱。