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
    • 2. 发明授权
    • Purification of 4,4'-benzophenonedicarboxylic acid
    • 4,4'-二苯甲酮二羧酸的纯化
    • US4173708A
    • 1979-11-06
    • US846758
    • 1977-10-31
    • Louis R. PalmerJames T. Karo
    • Louis R. PalmerJames T. Karo
    • C07C51/487C07C65/20
    • C07C51/487
    • A process is described for purifying 4,4'-benzophenonedicarboxylic acid, useful in preparing thermoplastic polyesters yielding molded articles having high impact strength, wherein the acid contains aromatic monocarboxylic acid genetic impurity, which comprises the steps of(a) mixing the impure 4,4-benzophenonedicarboxylic acid with aqueous ammonium hydroxide solution, containing about 28 weight percent or less of ammonia in a weight ratio of solution to acid of about 5:1 to 100:1, thereby forming a solution of the diammonium salt of the aromatic dicarboxylic acid;(b) mixing the resultant solution with an inert water-soluble organic liquid which is a non-solvent for the diammonium salt, in a weight ratio of organic liquid to solution not greater than about 20:1, thereby precipitating the diammonium salt of the acid;(c) separating the diammonium salt from the solution; and(d) recovering the aromatic dicarboxylic acid from the diammonium salt.
    • 一种方法是在制备热塑性聚酯得到具有高冲击强度的模塑制品,其中所述酸含有芳香族一元羧酸杂质遗传,其包括以下步骤:用于纯化4,4'-二苯甲酮二羧酸所描述的,有用的(a)混合不纯4, 4-二苯甲酮二羧酸与氢氧化铵水溶液混合,含有约28重量%或更少的氨,其酸与酸的重量比为约5:1至100:1,从而形成芳族二羧酸的二铵盐 ; (b)用惰性的水溶性有机液体,它是一种非溶剂的二铵盐将所得溶液混合,在有机液体的的重量比为溶液不大于约20:1,由此沉淀的二铵盐 酸; (c)从溶液中分离二铵盐; 和(d)从二铵盐中回收芳族二羧酸。
    • 3. 发明授权
    • Process for preparation of 2-(amylbenzoyl)benzoic acid
    • 2-(戊基苯甲酰基)苯甲酸的制备方法
    • US4087458A
    • 1978-05-02
    • US794620
    • 1977-05-06
    • Fumitoshi EmoriYasuhisa IwasakiTakao Yoshimura
    • Fumitoshi EmoriYasuhisa IwasakiTakao Yoshimura
    • C07C51/373C07C65/20
    • C07C51/373
    • This invention relates to an improvement in the process for preparation of 2-(amylbenzoyl)benzoic acid containing a high percentage of 2-(t-amylbenzoyl)benzoic acid. More particularly it relates to a process for preparation of 2-(amylbenozyl)benzoic acid wherein said 2-(amylbenzoyl)benzoic acid is prepared by reacting t-amylbenzene with phthalic anhydride in the presence of Lewis acid, characterized by that 2-(amylbenzoyl)benzoic acid containing a high percentage of 2-(t-amylbenzoyl)benzoic acid is produced by suppressing the undesirable isomerization reaction of the amyl radical by applying one of the means selected from the group consisting of the means of introducing an inert gas into the reaction system and the means of reducing the pressure of the reaction system. 2-(Amylbenzoyl)benzoic acid is a compound useful as the starting material of preparation of 2-amylanthraquinone which is an effective organic catalyst in the manufacture of hydrogen peroxide.
    • 本发明涉及含有高百分比的2-(叔戊基苯甲酰基)苯甲酸的2-(戊基苯甲酰基)苯甲酸的制备方法的改进。 更具体地说,涉及制备2-(戊基苯甲酰基)苯甲酸的方法,其中所述2-(戊基苯甲酰基)苯甲酸通过在路易斯酸存在下使叔戊基苯与邻苯二甲酸酐反应来制备,其特征在于2-(戊基苯甲酰基) )苯甲酸,其含有高百分比的2-(叔戊基苯甲酰基)苯甲酸是通过将选自由惰性气体引入惰性气体的方法中选择的一种方法抑制到所需的戊基自由基的不期望的异构化反应 反应体系和降低反应体系压力的手段。 2-(戊基苯甲酰基)苯甲酸是可用作制备过氧化氢的有效有机催化剂的2-戊基蒽醌的起始原料的化合物。