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    In situ conductimetric end point determination of the oxyethylation of phenolic compounds
    3.
    发明授权
    In situ conductimetric end point determination of the oxyethylation of phenolic compounds 失效
    酚类化合物的氧乙基化的原位电导终点测定

    公开(公告)号：US4249024A

    公开(公告)日：1981-02-03

    申请号：US68710

    申请日：1979-08-22

    申请人： David C. Sanders

    发明人： David C. Sanders

    IPC分类号： C07C41/03 ,  C07C43/23

    CPC分类号： C07C41/03

    摘要： The present invention discloses an improved method for the in situ end point determination of the oxyethylation of phenols. In the present invention, the oxyethylation reactions occur in the presence of catalysts and at temperatures in excess of 100.degree. C. The reaction end point is monitored by continuous measurements of the electrical conductivity of the reaction mixture and the reaction is terminated when a preselected rate of change of conductance is attained.The method of the present invention may be used with complex phenolic systems wherein alkali metal hydroxides, quarternary ammonium salts, or alkali metal alkoxides are used as oxyethylation catalysts.

    摘要翻译： 本发明公开了一种用于原位终点测定酚类的氧乙基化的改进方法。 在本发明中，氧化乙基化反应在催化剂存在下并在超过100℃的温度下进行。通过连续测量反应混合物的电导率来监测反应终点，当预选速率 的电导变化。 本发明的方法可用于其中使用碱金属氢氧化物，季铵盐或碱金属醇盐作为氧乙基化催化剂的复合酚系。

    Process for producing esters of 3,5-dibromo-4-hydroxybenzonitrile
    4.
    发明授权
    Process for producing esters of 3,5-dibromo-4-hydroxybenzonitrile 失效
    制备3,5-二溴-4-羟基苄腈酯的方法

    公开(公告)号：US4349488A

    公开(公告)日：1982-09-14

    申请号：US317613

    申请日：1981-11-03

    申请人： David A. Dentel ,  David C. Sanders

    发明人： David A. Dentel ,  David C. Sanders

    IPC分类号： C07C20060101 ,  C07C255/38 ,  C07C255/49 ,  C07C255/53 ,  C07C121/75

    CPC分类号： C07C255/00 ,  Y02P20/584

    摘要： 2,6-dibromo-4-cyanophenyl octanoates and other esters of 3,5-dibromo-4-hydroxybenzonitrile may be produced by reacting 4-hydroxybenzonitrile with bromine in the presence of an inert solvent and catalytic amounts of a basic heterocyclic aromatic compound or its hydrohalide, followed by removal of unreacted bromine and addition of octanoyl chloride or other acyl halide to the reaction mixture and recovery of the desired ester together with recyclable pyridine hydrohalide catalyst and solvent.

    摘要翻译： 2,6-二溴-4-氰基苯基辛酸酯和3,5-二溴-4-羟基苄腈的其它酯可以通过4-羟基苄腈与溴在惰性溶剂和催化量的碱性杂环芳族化合物的存在下反应来制备，或 然后除去未反应的溴，并向反应混合物中加入辛酰氯或其它酰基卤，并与可回收的吡啶氢卤酸酯催化剂和溶剂一起回收所需的酯。

    Process for producing metal bromides
    5.
    发明授权
    Process for producing metal bromides 失效
    金属溴化物生产工艺

    公开(公告)号：US4083942A

    公开(公告)日：1978-04-11

    申请号：US773851

    申请日：1977-03-03

    申请人： David C. Sanders

    发明人： David C. Sanders

    IPC分类号： C01F11/34 ,  C01B31/20 ,  C01D3/10

    CPC分类号： C01F11/34

    摘要： Alkali and alkaline earth metal bromides may be prepared by reacting a basic compound of an alkali or alkaline earth metal with a reducing agent in the presence of water and thereafter adding thereto stepwise alternate incremental portions of bromine and the basic compound while maintaining the pH less than about 7.0.

    摘要翻译： 碱金属和碱土金属溴化物可以通过在水存在下使碱金属或碱土金属的碱性化合物与还原剂反应制备，然后向其中逐步添加溴和碱性化合物的交替增量部分，同时保持pH小于 约7.0。

    Bromination of polystyrene using bromine as the reaction solvent
    6.
    发明授权
    Bromination of polystyrene using bromine as the reaction solvent 失效
    使用溴作为反应溶剂溴化聚苯乙烯

    公开(公告)号：US4879353A

    公开(公告)日：1989-11-07

    申请号：US266245

    申请日：1988-10-28

    申请人： David C. Sanders ,  John L. Sands ,  Joseph L. Stahl

    发明人： David C. Sanders ,  John L. Sands ,  Joseph L. Stahl

    IPC分类号： C08F8/20

    CPC分类号： C08F8/20

    摘要： A process for the bromination of polystyrenic homo- and co-polymers using bromine as the reaction medium, bromine chloride as the bromination reagent and a Lewis acid catalyst substantially improves product quality and permits controlling the reaction to achieve a desired level of bromination.

    摘要翻译： 使用溴作为反应介质溴化聚苯乙烯均聚物和共聚物的溴化方法，溴化氯作为溴化试剂和路易斯酸催化剂大大提高了产品质量，并允许控制反应以达到所需的溴化水平。

    High-density fluid compositions
    7.
    发明授权
    High-density fluid compositions 失效
    高密度流体组合物

    公开(公告)号：US4292183A

    公开(公告)日：1981-09-29

    申请号：US969236

    申请日：1978-12-13

    申请人： David C. Sanders

    发明人： David C. Sanders

    IPC分类号： C09K8/04 ,  E21B43/00 ,  C09K3/00

    CPC分类号： C09K8/04 ,  Y10S507/925 ,  Y10S507/926

    摘要： Clear, high-density fluids suitable for use as well completion, packing, and perforation media comprise aqueous solutions of zinc bromide and calcium bromide having densities lying in the range of about 14.5 up to about 18.0 pounds per gallon and measured pH's lying in the range of about 3.5 up to about 6.0. Optionally, such fluids may also comprise calcium chloride and/or a soluble film-forming amine-based corrosion inhibitor. Such fluids under conditions of ordinary use exhibit low corrosion rates and have crystallization points lying well below the range of temperatures under which they are used.

    摘要翻译： 适用于完成，填充和穿孔介质的透明的高密度流体包括溴化锌和溴化钙的水溶液，其密度在约14.5至约18.0磅/加仑的范围内，并且测量的pH值处于该范围内 约3.5至6.0。 任选地，这种流体还可以包含氯化钙和/或可溶性成膜胺基腐蚀抑制剂。 在普通使用条件下的这种流体表现出较低的腐蚀速率，并且结晶点远低于使用它们的温度范围。