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    Hydroxy aromatic ketones
    1.
    发明授权
    Hydroxy aromatic ketones 失效
    羟基芳香酮

    公开(公告)号：US5081155A

    公开(公告)日：1992-01-14

    申请号：US539290

    申请日：1990-06-15

    申请人： Leroy Krbechek ,  Wilson Lin

    发明人： Leroy Krbechek ,  Wilson Lin

    IPC分类号： C07C45/28 ,  C07C45/30 ,  C07C49/825 ,  C07C49/835

    CPC分类号： C07C49/835 ,  C07C45/28 ,  C07C45/30 ,  C07C49/825

    摘要： Novel hydroxy-aryl ketones are disclosed having a branched hydrocarbon chain on the aromatic nucleus ortho to the hydroxy group. The compounds were found to possess anti-microbial properties and are also useful as intermediates to the preparation of the corresponding oximes. The compounds are ideally defined by the formula: ##STR1## where R.sub.1 is a saturated or unsaturated, branched chain hydrocarbyl group and R.sub.2 is a saturated or unsaturated, straight or branched chain, hydrocarbyl group.

    Reoximation of metal extraction circuit organics
    2.
    发明授权
    Reoximation of metal extraction circuit organics 失效
    金属萃取回路有机物近似

    公开(公告)号：US5993757A

    公开(公告)日：1999-11-30

    申请号：US27063

    申请日：1998-02-20

    申请人： Michael J. Virnig ,  Leroy Krbechek ,  Mary Casey

    发明人： Michael J. Virnig ,  Leroy Krbechek ,  Mary Casey

    IPC分类号： C22B3/16 ,  C22B3/26 ,  C22B3/30 ,  C22B15/00 ,  C22B26/00 ,  C22B19/00 ,  C22B23/00

    CPC分类号： C22B23/04 ,  C22B3/0005 ,  C22B3/0017 ,  C22B3/0021 ,  Y02P10/234 ,  Y10S423/14

    摘要： A process for purifying a degraded oxime metal extractant organic phase from a metal extraction circuit wherein a degraded oxime metal extractant organic phase comprised of an oxime metal extractant, and aldehyde or ketone degradates in a water immiscible hydrocarbon solvent is reoximated thereby restoring the oxime extractant organic phase for further extraction in the metal extraction circuit. Optionally the degraded organic phase may be purified by distillation prior to reoximation. The distillation is carried out in a wiped film evaporator at temperatures above 180.degree. C. up to about 250.degree. C. at a pressure from about 0.5 mm Hg or lower up to about 10 mm Hg and the reoximation is carried out with hydroxylamine in the presence of a weak organic carboxylic acid as a phase transfer catalyst and in the presence of an alkali metal or alkaline earth metal hydroxide or carbonate, preferably sodium carbonate.

    摘要翻译： 从金属提取回路中纯化降解的肟金属萃取剂有机相的方法，其中在与水不混溶的烃溶剂中降解的由肟金属萃取剂和醛或酮降解的降解肟金属萃取剂有机相被重新近似，从而使肟萃取剂有机物 在金属提取电路中进一步提取相。 任选地，降解的有机相可以在重新近似之前通过蒸馏纯化。 在擦拭膜蒸发器中，在高于180℃至约250℃的温度下，在约0.5mm Hg或更低至约10mm Hg的压力下进行蒸馏，并且在羟胺在 存在弱有机羧酸作为相转移催化剂，并在碱金属或碱土金属氢氧化物或碳酸盐，优选碳酸钠存在下进行。

    2-hydroxy-5-alkyl-beta-methylstyrene and process of preparing hydroxyarylaldehydes therefrom
    3.
    发明授权
    2-hydroxy-5-alkyl-beta-methylstyrene and process of preparing hydroxyarylaldehydes therefrom 失效
    2-羟基-5-烷基-β-甲基苯乙烯及其制备羟基芳基醛的方法

    公开(公告)号：US5877355A

    公开(公告)日：1999-03-02

    申请号：US912009

    申请日：1997-08-15

    申请人： Leroy Krbechek

    发明人： Leroy Krbechek

    IPC分类号： C07C37/48 ,  C07C45/40 ,  C07C45/67 ,  C07C67/293 ,  C07C69/017 ,  C07C45/27

    CPC分类号： C07C69/017 ,  C07C37/00 ,  C07C37/055 ,  C07C41/16 ,  C07C45/40 ,  C07C45/673 ,  C07C67/293

    摘要： Process for making an alkyl-substituted salicylaldehyde wherein the alkyl substitution amounts to at least 8 alkyl carbon atoms per molecule, and preferably not more than 25, comprising ozonolizing an alkyl-substituted 2-hydroxy beta-methylstyrene wherein said alkyl substitution amounts to at least 8 carbon atoms per molecule. Upon oximation of the products, useful metal extractants are produced, particularly for the extraction of copper.

    摘要翻译： 制备烷基取代的水杨醛的方法，其中烷基取代量为每分子至少8个烷基碳原子，优选不超过25个，其包括使烷基取代的2-羟基β-甲基苯乙烯臭氧化，其中所述烷基取代量至少为 每个分子8个碳原子。 当产物肟化时，生产有用的金属萃取剂，特别是用于提取铜。

    Esterification of phenols
    4.
    发明授权
    Esterification of phenols 失效
    苯酚酯化

    公开(公告)号：US5808130A

    公开(公告)日：1998-09-15

    申请号：US714279

    申请日：1996-09-17

    申请人： Leroy Krbechek

    发明人： Leroy Krbechek

    IPC分类号： C07C67/08 ,  C07C69/00

    CPC分类号： C07C67/08 ,  C07C45/54

    摘要： Relates to the direct esterification of phenols, particularly alkyl-substituted phenols, with a carboxylic acid or anhydride, in the presence of a strong acid catalyst. Also relates to the use of the acid anhydride to drive the esterification reaction to completion, where an initial reaction mixture has been formed using the carboxylic acid. Further relates to the achievement of economies in esterification by recovering dilute aqueous acid when either the acid or anhydride is used initially, for recycling to achieve economies of acid use.

    摘要翻译： 涉及在强酸催化剂存在下，苯酚，特别是烷基取代的酚与羧酸或酸酐直接酯化。 还涉及使用酸酐驱动酯化反应完成，其中已经使用羧酸形成初始反应混合物。 进一步涉及当最初使用酸或酸酐进行回收时，通过回收稀酸水溶液来实现酯化的经济性，以循环利用以实现酸的使用。