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1.发明授权Process for a decarbromodiphenylethane predominate product having enhanced whiteness 失效具有提高白度的脱溴二苯基乙烷主要产品的方法
公开(公告)号：US5324874A
公开(公告)日：1994-06-28
申请号：US930809
申请日：1992-08-17
摘要： This invention relates to an improvement in a process for preparing a product predominant in decabromodiphenylethane. In the improved process the diphenylethane is reacted with bromine in the presence of bromination catalyst in a reaction vessel by feeding diphenylethane to the reaction vessel below the liquid level of bromine in the reaction vessel. The improvement comprises contacting diphenylethane, bromine, and catalyst at a rate sufficient to obtain a diphenylethane predominant product having enhanced color and particle size.
摘要翻译： 本发明涉及在十溴二苯乙烷中主要制备产物的方法的改进。 在改进的方法中，在溴化催化剂存在下，在反应容器中将二苯基乙烷与溴反应，通过在反应容器中的溴含量以下的反应容器中加入二苯基乙烷。 改进包括使二苯基乙烷，溴和催化剂以足以获得具有增强的颜色和粒度的二苯基乙烷主要产物的速率接触。
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公开(公告)号：US06455739B1
公开(公告)日：2002-09-24
申请号：US09949380
申请日：2001-09-07
IPC分类号： C07C4550
CPC分类号： C07C29/124 , C07C45/49 , C12C11/02 , C07C33/46 , C07C47/55
摘要： 4-Fluorobenzaldehyde is produced by a commercially feasible process. The process comprises heating a mixture of fluorobenzene and a strong Lewis acid with dissolved hydrogen halide in an atmosphere of carbon monoxide at about 45 to about 100° C. and at a total pressure of about 150 psig up to the maximum pressure rating of the reactor. Formed is a reaction mass containing a Lewis acid complex of 4-fluorobenzaldehyde and at least a halobis(fluorophenyl)methane by-product. The complex is broken by quenching the reaction mass with a Lewis acid-solvating liquid to liberate 4-fluorobenzaldehyde. By-product halobis(fluorophenyl)methane is converted to di(fluorophenyl)methanol to avoid potential corrosion problems and formation of light sensitive color bodies in the recovered 4-fluorobenzaldehyde.
摘要翻译： 4-氟苯甲醛是通过商业可行的方法生产的。 该方法包括在约45至约100℃的一氧化碳气氛中，在溶解的卤化氢气氛下加热氟苯和强路易斯酸的混合物，总压力为约150psig，直到反应器的最高额定压力 。 形成含有4-氟苯甲醛和至少一个卤代双（氟苯基）甲烷副产物的路易斯酸络合物的反应物质。 通过用路易斯酸溶剂化液体淬灭反应物质以释放4-氟苯甲醛来破坏络合物。 将副产物卤代（氟苯基）甲烷转化为二（氟苯基）甲醇，以避免在回收的4-氟苯甲醛中潜在的腐蚀问题和光敏颜料的形成。
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公开(公告)号：US5672749A
公开(公告)日：1997-09-30
申请号：US631295
申请日：1996-04-09
CPC分类号： C07C51/60
摘要： The yield of acetyl chloride from the reaction between acetic anhydride and hydrogen chloride is increased by withdrawing acetyl chloride, optionally together with at least some of the acetic acid by-product, from the reaction mixture as the reaction proceeds and recycling the remainder of the reaction mixture to the reactor for reaction with additional hydrogen chloride.
摘要翻译： 随着反应的进行，乙酸酐和氯化氢之间的反应产生的乙酰氯的产率通过从反应混合物中任选地与至少一些乙酸副产物一起取出而再循环剩余的反应来提高乙酰氯 混合物加入到反应器中以与另外的氯化氢反应。
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