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公开(公告)号:US06399835B1
公开(公告)日:2002-06-04
申请号:US09543791
申请日:2000-04-06
申请人: Ariel Ewenson , David Itzhak , Miriam Freiberg Bergstein , Asher Shushan , Bertha Croitoru , David Beneish , Naim Faza
发明人: Ariel Ewenson , David Itzhak , Miriam Freiberg Bergstein , Asher Shushan , Bertha Croitoru , David Beneish , Naim Faza
IPC分类号: C07C4561
CPC分类号: C07C201/12 , B01J27/08 , C07B37/04 , C07B39/00 , C07B41/06 , C07C2/70 , C07C41/22 , C07C45/46 , C07C45/63 , C07C2527/08 , C07C2527/138 , C07C2527/173 , Y02P20/582 , C07C49/84 , C07C47/55 , C07C205/12 , C07C43/225
摘要: Processes for the electrophilic substitution of aromatic compounds, such as alkylation, with a desired substituent are disclosed. The processes include contacting the aromatic compound, a precursor of the desired substituent and an aqueous reagent containing zinc halide at elevated temperatures such as above 50° C.
摘要翻译: 公开了芳族化合物的亲电取代,例如烷基化的所需取代基的方法。 这些方法包括使芳族化合物,所需取代基的前体和含有卤化锌的水性试剂在高于50℃的高温下接触。
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2.
公开(公告)号:US20060127301A1
公开(公告)日:2006-06-15
申请号:US10536198
申请日:2003-12-01
IPC分类号: C01F11/34
摘要: A process for the preparation of Solid Calcium Bromide Hydrates comprises preparing a highly concentrated Calcium Bromide solution from an initial solution having a lower concentration, bringing it into contact with a cold surface, whereby solid Calcium Bromide hydrates form on said surface, and detaching said solid hydrates from said surface. The concentration of the initial solution is not higher than 60 wt %, typically 52 wt %, and is brought to from 65 to 78 wt %. The said Calcium Hydrates are mainly tetrahydrate Calcium Bromide. The Solid Calcium Hydrates have many uses in the processing of oil wells, for instance preparation of completion fluids, work-over fluids or drill-in fluids in the processing of wells, restoring already used and/or depleted such fluids to the desired, original density. They also have other uses, particularly for soil remediation.
摘要翻译: 制备固体溴化钙水合物的方法包括从具有较低浓度的初始溶液制备高度浓缩的溴化钙溶液,使其与冷表面接触,由此在所述表面上形成固体溴化钙水合物,并将所述固体 从表面水合。 初始溶液的浓度不高于60重量%,通常为52重量%,并且为65至78重量%。 所述钙水合物主要是四水合溴化钙。 固体钙水合物在加工油井方面有很多用途,例如在加工井中制备完井液,修补液或钻井液,将已经使用和/或耗尽的这种流体还原成所需的原始 密度。 他们还有其他用途,特别是土壤修复。
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公开(公告)号:US06241864B1
公开(公告)日:2001-06-05
申请号:US09407812
申请日:1999-09-28
IPC分类号: G02N2726
CPC分类号: G01N27/49
摘要: A potentiostatic analyzer for active halogens in conducting solutions that contain also the corresponding halide comprises, in combination: a) a concentration-to-current transducer, which is an electrolytic cell; b) means for providing a controlled flow of the solution being analyzed through the cell; and c) a potentiostatic transmitter for controlling the electrodes of the electrolytic cell.
摘要翻译: 还包含相应的卤化物的导电溶液中的活性卤素的恒电位分析仪包括:a)作为电解池的浓度 - 电流换能器; b)用于提供通过电池分析的溶液的受控流动的装置; 和c)用于控制电解池电极的恒电位发射器。
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