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    • 108. 发明授权
    • Process for continuous purification of crude caprolactam prepared from
6-aminocapronitrile
    • 从6-氨基己腈制备的己内酰胺的连续纯化方法
    • US5496941A
    • 1996-03-05
    • US375410
    • 1995-01-18
    • Josef RitzRolf FischerWerner SchnurrGu/ nther AchhammerHermann LuykenEberhard Fuchs
    • Josef RitzRolf FischerWerner SchnurrGu/ nther AchhammerHermann LuykenEberhard Fuchs
    • C07D201/08C07D201/16
    • C07D201/16Y02P20/52
    • Crude capronitrile is purified by hydrogenation, subsequent treatment in an acidic medium and subsequent distillation in an alkaline medium, by a process in which(a) 6-aminocapronitrile is converted into crude caprolactam by reaction with water,(b) high boilers and low boilers are separated off from the crude caprolactam from step (a),(c) the crude caprolactam from step (b) is treated with hydrogen at from 50.degree. to 150.degree. C. and from 1.5 to 250 bar in the presence of a hydrogenation catalyst and, if desired, of a solvent to give a mixture A,(d1) mixture A in a solvent is passed, at from 30.degree. to 80.degree. C. and from 1 to 5 bar, over an ion exchanger containing terminal acid groups to give a mixture B1, or(d2) mixture A is distilled in the presence of sulfuric acid, any solvent present being removed before the addition of the sulfuric acid, to give a mixture B2, and(e) mixture B1 or mixture B2 is distilled in the presence of a base to give pure caprolactam.
    • 通过氢化纯化粗碳腈,随后在酸性介质中处理,随后在碱性介质中进行蒸馏,其中(a)通过与水反应将(a)6-氨基己腈转化为粗己内酰胺,(b)高锅炉和低锅炉 与步骤(a)中的粗己内酰胺分离,(c)步骤(b)中的粗己内酰胺在氢化催化剂存在下在50-150℃和1.5-250巴下用氢处理 并且如果需要,得到溶剂以得到混合物A,(d1)溶剂中的混合物A在30℃至80℃和1至5巴条件下通过含有末端酸基团的离子交换剂 得到混合物B1,或(d2)在硫酸存在下蒸馏混合物A,在加入硫酸之前,除去存在的任何溶剂,得到混合物B2,并且(e)蒸馏出混合物B1或混合物B2 在碱的存在下得到纯己内酰胺。
    • 109. 发明授权
    • Removal of cyclohexanol from aqueous solutions containing it and
aromatic sulfonic acids
    • 从含有它的水溶液和芳族磺酸中除去环己醇
    • US4982018A
    • 1991-01-01
    • US400530
    • 1989-08-30
    • Hans-Juergen GoschRolf FischerHermann Luyken
    • Hans-Juergen GoschRolf FischerHermann Luyken
    • B01J31/34C07B61/00C07C27/00C07C29/04C07C29/80C07C29/84C07C35/08C07C67/00
    • C07C29/80C07C2101/14
    • Cyclohexanol is removed from aqueous solutions containing it and aromatic sulfonic acids, obtained by hydrating cyclohexene in aqueous solutions of aromatic sulfonic acids at elevated temperatures and subsequent removal of excess cyclohexene, by(a) feeding the aqueous solution which contains the cyclohexanol and the aromatic sulfonic acid into the upper third of a first column and from 1 to 50 parts by weight of steam per part by weight of cyclohexanol into the bottom third of the column, withdrawing at the top of the column a vapor which consists essentially of cyclohexanol, cyclohexene and water, and obtaining as a bottom product an aqueous solution of the aromatic sulfonic acid,(b) condensing the vapor which consists essentially of cyclohexanol, cyclohexene and water and(b1) obtaining a cyclohexanol-rich phase and(b2) an aqueous phase,(c) utilizing the aqueous phase (b2) for generating the steam required in stage (a) and any remainder for the hydration of cyclohexene, and(d) distilling off from the cyclohexanol-rich phase (b1) in a second column a mixture of cyclohexene and water with or without cyclohexanol as top product, leaving cyclohexanol as bottom product.
    • 通过(a)将含有环己醇和芳香族磺酸的水溶液进料,将环己醇从含有它的水溶液和芳族磺酸中除去,通过在高温下将环己烯在芳族磺酸的水溶液中水合并随后除去过量的环己烯而得到 酸进入第一塔的上三分之一,并且每重量份1至50重量份的环己醇的环己醇至塔的底部三分之一,在塔的顶部抽出基本上由环己醇,环己烯和 水,并且作为底部产物获得芳族磺酸的水溶液,(b)使基本上由环己醇,环己烯和水组成的蒸气冷凝,和(b1)获得富含环己醇的相和(b2)水相, (c)使用水相(b2)产生阶段(a)中所需的蒸汽和用于环己烯水合的任何剩余物,和(d)d 在第二列中从环己醇富含相(b1)中除去环己醇和水的混合物,其中有或没有环己醇作为顶部产物,留下环己醇作为底部产物。