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
    • 6. 发明授权
    • Integrated oxidation of isomeric xylene mixture to isomeric phthalic acid mixture and separation of mixture of isomeric phthalic acids into individual isomer products
    • 异构二甲苯混合物与异构酸混合物的一体化氧化和将异构酸性酸混合物分离到个体异构体产物中
    • US3683018A
    • 1972-08-08
    • US3683018D
    • 1969-05-26
    • STANDARD OIL CO
    • LONGLAND GEORGE M JR
    • C07C51/265C07C51/43C07C51/42C07C51/44C07C63/02
    • C07C51/43C07C51/265C07C63/24C07C63/26
    • Liquid phase oxidation of isomeric xylene mixture with molecular oxygen-containing gas (e.g. air or oxygen gas) in the presence of aqueous or acetic acid reaction media and catalysis provided by one or more heavy metals (metals of about 50 to about 200 atomic weight) or by a side-chain oxidation initiator or promotor (bromine source, or acetaldehyde or methylenic ketone) provides oxidation effluent containing mixture of isomeric phthalic acids for product crystallization and reaction media displacement from concentrate of said effluent by contact of the concentrate with water in a single step, preferably conducted with a vertical column of water, thereby producing aqueous acetic acid for feed to acetic acid recovery and recycle to oxidation and aqueous slurry of mixture of isomeric phthalic acids as feed for separation into individual phthalic acid isomer products. Isoand tere-phthalic acids in particular are separated from mixtures of the same by crystal size classification.
    • 在含水或乙酸反应介质和由一种或多种重金属(约50至约200原子量的金属)提供的催化作用的情况下,使用含分子氧气体(例如空气或氧气)的异构二甲苯混合物进行液相氧化, 或通过侧链氧化引发剂或促进剂(溴源或乙醛或亚甲基酮)提供含有异构邻苯二甲酸混合物的氧化流出物,用于产物结晶,并且通过将浓缩物与水接触,从所述流出物的浓缩物中移出反应介质 单步,优选用垂直的水柱进行,从而产生乙酸水溶液用于进料至乙酸回收并循环至氧化,并将异构邻苯二甲酸的混合物的含水浆液作为进料分离成单独的邻苯二甲酸异构体产物。 异 - 邻苯二甲酸特别是通过晶体尺寸分类从其混合物中分离出来。