Process for preparing 2,2-bis(4-hydroxy-phenyl) propane from
distillation by-products thereof
    8.
    发明授权
    Process for preparing 2,2-bis(4-hydroxy-phenyl) propane from distillation by-products thereof 失效
    从蒸馏副产物制备2,2-双(4-羟基 - 苯基)丙烷的方法

    公开(公告)号:US4188496A

    公开(公告)日:1980-02-12

    申请号:US863667

    申请日:1977-12-23

    CPC分类号: C07C37/00 C07C37/48

    摘要: A process is disclosed for the production of 2,2-bis(4-hydroxyphenyl) propane, herein referred to as bisphenol-A, from by-products remaining after purification distillation of bisphenol-A produced from a condensation reaction of phenol and acetone. The process comprises mixing the by-products with phenol and treating the resulting mixture with anhydrous hydrogen bromide to isomerize those by-products isomerizable to bisphenol-A for subsequent recovery.

    摘要翻译: 公开了用于由苯酚和丙酮的缩合反应产生的双酚A的纯化蒸馏后残留的副产物生产2,2-双(4-羟基苯基)丙烷(以下称为双酚A)的方法。 该方法包括将副产物与苯酚混合并用无水溴化氢处理所得混合物以使可异构化为双酚A的副产物异构化以用于随后的回收。

    Thermally stable polycarbonate composition
    10.
    发明授权
    Thermally stable polycarbonate composition 失效
    热稳定的聚碳酸酯组合物

    公开(公告)号:US3945967A

    公开(公告)日:1976-03-23

    申请号:US512434

    申请日:1974-10-07

    IPC分类号: C08L69/00 C08J3/20

    CPC分类号: C08L69/00

    摘要: A thermally stable polycarbonate composition comprising in admixture, an aromatic carbonate polymer and a stabilizing amount of an additive which is a combination of an epoxy compound prepared from an epichlorodydrin and the reaction product of an alkyl phosphite and the chlorine containing contaminant in said epoxy compound.

    摘要翻译: 一种热稳定性聚碳酸酯组合物,其包含芳族碳酸酯聚合物和稳定量的添加剂,所述添加剂是由环氧氯丙烷制备的环氧化合物与所述环氧化合物中的亚磷酸烷基酯和含氯污染物的反应产物的组合。