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    • 1. 发明授权
    • Method for producing cyclopentanone
    • 环戊酮生产方法
    • US06429339B1
    • 2002-08-06
    • US09700365
    • 2000-11-15
    • Shelue LiangRolf FischerFrank SteinJoachim Wulff-Döring
    • Shelue LiangRolf FischerFrank SteinJoachim Wulff-Döring
    • C07C4500
    • B01J23/10C07C45/48C07C49/395
    • A process for preparing cyclopentanone by reacting adipic esters of the formula R1OOC—(CH2)4—COOR2  I where R1 and R2 are each alkyl having from 1 to 12 carbon atoms, cycloalkyl having 5 or 6 carbon atoms, aralkyl or aryl and R2 may additionally be hydrogen, in the presence of oxidic catalysts comprises reacting adipic esters of the formula I having less than 5% by weight of by-products other than adipic esters in the gas phase in the presence of water, a carrier gas and a) from 0.01 to 10% by weight of at least one metal oxide selected from the first or second main group of the periodic table or from the group of the rare earth metals on titanium dioxide or zirconium dioxide as catalyst support, or b) from 0.01 to 50% by weight of at least one metal oxide selected from the second main group of the periodic table on zink oxide as catalyst support.
    • 通过使式R 1和R 2的己二酸酯反应制备环戊酮的方法各自是在氧化催化剂存在的情况下,可以另外为氢,其中R 1和R 2各自为具有1至12个碳原子的烷基,具有5或6个碳原子的环烷基或芳基, 包括使式I的己二酸酯在水,载气的存在下,在气相中具有小于5重量%的除己二酸酯之外的副产物,和(ii)0.01至10重量%的至少一种金属 氧化物,其选自周期表的第一或第二主族,或者来自稀土金属的二氧化钛或二氧化锆的组,作为催化剂载体,orb)为0.01至50重量%的至少一种选自 氧化锌作为催化剂载体的周期表第二主要组。
    • 10. 发明授权
    • Process for preparing 1,6 hexanediol with a level of purity over 99%
    • 制备纯度超过99%的1,6己二​​醇的方法
    • US6008418A
    • 1999-12-28
    • US125976
    • 1998-08-28
    • Karl Gerhard BaurRolf FischerRolf PinkosFrank SteinHarald RustBoris Breitscheidel
    • Karl Gerhard BaurRolf FischerRolf PinkosFrank SteinHarald RustBoris Breitscheidel
    • B01J23/80B01J23/889C07B61/00C07C29/149C07C31/20
    • C07C29/149
    • 1,6-Hexanediol is prepared from a carboxylic acid mixture comprising adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols which is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol by water extraction of the reaction mixture, by esterification of the acids and hydrogenation whereina) the monocarboxylic and dicarboxylic acids present in the aqueous dicarboxylic acid mixture are reacted with a low molecular weight alcohol to give the corresponding carboxylic esters,b) the resulting esterification mixture is freed of excess alcohol and low boilers in a first distillation stage,c) the bottoms are fractionated in a second distillation stage to give an ester fraction essentially free of 1,4-cyclohexanediols and a fraction comprising at least the major part of the 1,4-cyclohexanediols,d) the ester fraction essentially free of 1,4-cyclohexanediols is catalytically hydrogenated ande) in a pure distillation stage, 1,6-hexanediol is isolated from the hydrogenation product in a manner known per se.
    • PCT No.PCT / EP97 / 00980 Sec。 371日期1998年8月28日 102(e)1998年8月28日PCT PCT 1997年2月28日PCT公布。 公开号WO97 / 31882 日期1991年9月4日6,6-己二醇由包含己二酸,6-羟基己酸和少量1,4-环己二醇的羧酸混合物制备,其作为副产物在环己烷氧化成环己酮/ 环己醇通过水提取反应混合物,通过酸的酯化和氢化,其中存在于二羧酸水溶液混合物中的单羧酸和二羧酸与低分子量醇反应得到相应的羧酸酯,b)得到的 酯化混合物在第一蒸馏阶段中不含过量的醇和低沸点,c)在第二蒸馏阶段对塔底物进行分馏,得到基本上不含1,4-环己烷二醇的酯馏分和至少包含至少大部分 1,4-环己烷二醇,d)基本上不含1,4-环己烷二醇的酯馏分是催化氢化的,e)在纯蒸馏阶段, 以本身已知的方式从加氢产物中分离出1,6-己二醇。