会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明申请
    • PROCESS FOR THE PREPARATION OF 4,4'-OXYBISPHTHALIC DIANHYDRIDE
    • 制备4,4'-二氧化二硅烷的方法
    • WO1998027047A1
    • 1998-06-25
    • PCT/IL1997000415
    • 1997-12-18
    • BROMINE COMPOUNDS LTD.OREN, Jakob
    • BROMINE COMPOUNDS LTD.
    • C07C51/567
    • C07C63/68C07C51/56C07C51/567C07C65/24
    • A process for the preparation of 4,4'-oxybisphthalic dianhydride, comprises the steps of: (a) reacting a 4-halophthalic anhydride, wherein "halo-" is selected from the group consisting of bromo-, chloro-, and fluoro-, with an alkali metal hydroxide chosen from among aqueous KOH, aqueous NaOH, or a mixture thereof, to produce dipotassium- or disodium-4-halophthalate, or a mixture thereof; (b) drying said dipotassium- and/or disodium-4-halophthalate; and (c) reacting said dipotassium- and/or disodium-4-halophthalate with a 4-halophthalic anhydride, wherein "halo-" is selected from the group consisting of bromo-, chloro-, and fluoro-, in the presence of a suitable solvent and a phase transfer catalyst to give 4,4'-oxybisphthalic dianhydride.
    • 一种制备4,4'-氧邻苯二甲酸二酐的方法包括以下步骤:(a)使4-卤代邻苯二甲酸酐反应,其中“卤素”选自溴 - ,氯 - 和氟 - 与选自KOH水溶液,NaOH水溶液或其混合物的碱金属氢氧化物反应,生成2-卤代二钠或四钠盐,或其混合物; (b)干燥所述二钾和/或二卤代-4-邻苯二甲酸二钠; 和(c)使所述二卤代二钠和/或二钠邻苯二甲酸二钠与4-卤代邻苯二甲酸酐反应,其中“卤素”选自溴 - ,氯 - 和氟 - ,在 合适的溶剂和相转移催化剂,得到4,4'-氧代双邻苯二甲酸二酐。
    • 10. 发明申请
    • PROCESS OF PREPARING BROMOPICRIN
    • 制备BROMOPICRIN的方法
    • WO2007023496A3
    • 2007-07-05
    • PCT/IL2006000978
    • 2006-08-22
    • BROMINE COMPOUNDS LTDOREN JAKOBGOLAN LEAHFRIM RON
    • OREN JAKOBGOLAN LEAHFRIM RON
    • C07C205/00
    • C07C201/12C07C205/08
    • Process of preparing high purity bromopicrin, and high purity bromopicrin produced therefrom. Providing a mixture of nitromethane and bromine, and preferably water, and absent of organic solvent. Adding an aqueous solution of an alkaline substance to the mixture, thereby providing a reaction mixture containing bromopicrin, the adding performed such that no excess of the alkaline substance occurs in the reaction mixture during the adding. Collecting the organic phase (containing the bromopicrin) from the reaction mixture. No need for subjecting the organic phase of the reaction mixture to distillation or extraction, for obtaining near quantitative yield of bromopicrin having purity of at least equal to or greater than 96 weight percent. Process parameters controlling selectivity of reaction forming bromopicrin are molar ratio of bromine and nitromethane in the mixture; reaction temperature while bromopicrin is formed; concentration of the alkaline substance in the aqueous solution; and reaction time.
    • 制备高纯度溴氰菊酯和由其制备的高纯度溴氰菊酯的方法。 提供硝基甲烷和溴的混合物,优选水,并且不存在有机溶剂。 向混合物中加入碱性物质的水溶液,由此提供含有溴氰菊酯的反应混合物,进行添加,使得在添加期间反应混合物中不会发生过量的碱性物质。 从反应混合物中收集有机相(含溴氰菊酯)。 不需要使反应混合物的有机相进行蒸馏或萃取,以获得纯度至少等于或大于96重量%的溴定额素的近定量产率。 控制反应形成溴氰菊酯的选择性的工艺参数是混合物中溴和硝基甲烷的摩尔比; 反应温度,同时形成溴化铁; 碱性物质在水溶液中的浓度; 和反应时间。