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公开(公告)号：US4345101A
公开(公告)日：1982-08-17
申请号：US269602
申请日：1981-06-02
申请人： Shiro Asano , Kohei Shizuka , Yoshihiko Kambara , Junji Mikami , Hiroshi Kato , Tadatoshi Honda
发明人： Shiro Asano , Kohei Shizuka , Yoshihiko Kambara , Junji Mikami , Hiroshi Kato , Tadatoshi Honda
IPC分类号： C07C231/24 , B01J23/00 , C07C233/09 , C07C253/34 , C08F20/52 , C08F120/56 , C07C103/133
CPC分类号： C07C253/34 , C07C231/24
摘要： An aqueous solution of acrylamide obtained by catalytic hydration of acrylonitrile in the presence of a copper-based catalyst is purified by the steps, in sequence, of (a) removal of the unreacted acrylonitrile, (b) removal of copper, (c) treatment under basic conditions, (d) cation exchanging treatment and (e) weakly basic anion exchanging treatment. The acrylamide obtained by this process has good storage stability. An acrylamide polymer produced from this monomer is useful as a flocculant having a reduced content of the unreacted monomer, a high molecular weight and excellent solubility in water.
摘要翻译： 通过在（a）去除未反应的丙烯腈，（b）去除铜，（c）处理（c）处理的步骤中，按照以下步骤来纯化在铜基催化剂存在下通过丙烯腈的催化水合获得的丙烯酰胺水溶液 在碱性条件下，（d）阳离子交换处理和（e）弱碱性阴离子交换处理。 通过该方法获得的丙烯酰胺具有良好的储存稳定性。 由该单体制备的丙烯酰胺聚合物可用作具有降低的未反应单体含量，高分子量和优异的在水中的溶解度的絮凝剂。
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公开(公告)号：US5041656A
公开(公告)日：1991-08-20
申请号：US565900
申请日：1990-08-10
申请人： Shiro Asano , Mareo Tokunaga , Yoshihiko Kambara
发明人： Shiro Asano , Mareo Tokunaga , Yoshihiko Kambara
IPC分类号： C07B61/00 , B01J25/00 , C07C67/00 , C07C231/00 , C07C231/06 , C07C233/09
CPC分类号： C07C233/09 , Y02P20/584
摘要： A catalyst useful in the practice of a process, in which (meth)acrylamide is prepared through the hydration reaction between (meth)acrylonitrile and water in a suspended liquid-phase bed of a Raney copper catalyst, has been obtained by leaching a Raney copper alloy in the presence of the Raney copper catalyst which has been deteriorated. The above useful catalyst has higher performances, compared with a catalyst obtained by conventionally leaching the Raney copper alloy alone, has satisfactory handling properties in settling and filtering, and can significantly reduced the amount of catalyst to be discarded.
摘要翻译： 通过在阮内铜催化剂的悬浮液相床中通过（甲基）丙烯腈和水之间的水合反应制备（甲基）丙烯酰胺的方法的实践中有用的催化剂是通过浸出阮内铜 在已经劣化的阮内铜催化剂存在下合金。 与通过常规浸提阮内铜合金而获得的催化剂相比，上述有用的催化剂具有更高的性能，在沉降和过滤中具有令人满意的处理性能，并且可以显着降低待抛弃的催化剂的量。
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公开(公告)号：US4670590A
公开(公告)日：1987-06-02
申请号：US850605
申请日：1986-04-11
IPC分类号： C07C231/24 , B01D9/00 , C08J3/12 , C07C103/133
CPC分类号： B01D9/005
摘要： Acrylamide crystals are prepared from an aqueous solution of acrylamide by causing the aqueous solution and a coolant to flow inside each electrolytically-polished cooling tube of a double-walled or shell-and-tube heat exchanger and outside the cooling tube, respectively, instead of relying upon vacuum crystallization.
摘要翻译： 通过使水溶液和冷却剂分别在双壁或管壳式热交换器的每个电解抛光的冷却管内部分别流过冷却管外部，由丙烯酰胺水溶液制备丙烯酰胺晶体，而不是 依靠真空结晶。
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公开(公告)号：US5534655A
公开(公告)日：1996-07-09
申请号：US392508
申请日：1995-02-23
申请人： Yoshihiko Kambara , Yoshikazu Uehara , Takeya Abe , Koichi Asao
发明人： Yoshihiko Kambara , Yoshikazu Uehara , Takeya Abe , Koichi Asao
IPC分类号： C07C231/06 , C07C231/24
CPC分类号： C07C231/065 , C07C231/24
摘要： A process for preparing acrylamide is disclosed herein which comprises subjecting acrylonitrile to a hydration reaction in the presence of a copper-based catalyst, said process comprising the step of allowing a compound having an active methylene group and an acidic group in one molecule or a salt of the compound, for example, malonic acid, cyanoacetic acid or its salt to be present in a reaction system. According to the hydration reaction, it is possible to inhibit the secondary formation of impurities which cannot be heretofore removed, without any deterioration of a catalyst activity, and acrylamide can be obtained which is useful as a material for the manufacture of a high-molecular weight flocculant having a sufficiently large molecular weight and a good water solubility.
摘要翻译： 本文公开了一种制备丙烯酰胺的方法，其包括在铜基催化剂存在下使丙烯腈进行水合反应，所述方法包括使一分子中具有活性亚甲基和酸性基团的化合物或盐 的化合物，例如丙二酸，氰基乙酸或其盐存在于反应体系中。 根据水合反应，可以抑制不可能除去的杂质的二次形成，而不会降低催化剂活性，并且可以获得丙烯酰胺，其可用作制备高分子量的材料 絮凝剂具有足够大的分子量和良好的水溶性。
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公开(公告)号：US07705187B2
公开(公告)日：2010-04-27
申请号：US11666154
申请日：2006-07-06
申请人： Tadao Nishida , Yoshihiko Kambara
发明人： Tadao Nishida , Yoshihiko Kambara
IPC分类号： C07F5/02
CPC分类号： C07F5/027
摘要： The present invention provides a method for industrial production of trihydrocarbylborane which method is excellent both in quality and in cost. The present invention is concerned with production of trihydrocarbylborane, comprising a reaction synthesizing the trihydrocarbylborane and aluminum oxide from trihydrocarbylboroxine and trihydrocarbylaluminum, characterized in that the reaction is allowed to proceed so that the trihydrocarbylaluminum is present at the end of the reaction in an amount of 0.5 moles or more per mole of the aluminum oxide produced in the reaction.
摘要翻译： 本发明提供三烃基硼烷的工业化生产方法，其质量和成本均优异。 本发明涉及三烃基硼烷的制备，其包括从三烃基硼烷和三烃基铝合成三烃基硼烷和氧化铝的反应，其特征在于使反应进行，使得三烃基铝在反应结束时以0.5的量存在 摩尔或更多每摩尔反应中产生的氧化铝。
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公开(公告)号：US20080287712A1
公开(公告)日：2008-11-20
申请号：US11666154
申请日：2006-07-06
申请人： Tadao Nishida , Yoshihiko Kambara
发明人： Tadao Nishida , Yoshihiko Kambara
IPC分类号： C07F5/02
CPC分类号： C07F5/027
摘要： The present invention provides a method for industrial production of trihydrocarbylborane which method is excellent both in quality and in cost. The present invention is concerned with production of trihydrocarbylborane, comprising a reaction synthesizing the trihydrocarbylborane and aluminum oxide from trihydrocarbylboroxine and trihydrocarbylaluminum, characterized in that the reaction is allowed to proceed so that the trihydrocarbylaluminum is present at the end of the reaction in an amount of 0.5 moles or more per mole of the aluminum oxide produced in the reaction.
摘要翻译： 本发明提供三烃基硼烷的工业化生产方法，其质量和成本均优异。 本发明涉及三烃基硼烷的制备，其包括从三烃基硼烷和三烃基铝合成三烃基硼烷和氧化铝的反应，其特征在于使反应进行，使得三烃基铝在反应结束时以0.5的量存在 摩尔或更多每摩尔反应中产生的氧化铝。
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公开(公告)号：US5015766A
公开(公告)日：1991-05-14
申请号：US284727
申请日：1988-12-15
申请人： Yoshihiko Kambara , Itsuo Oonaka , Koichi Asao , Kyoko Fukushima
发明人： Yoshihiko Kambara , Itsuo Oonaka , Koichi Asao , Kyoko Fukushima
IPC分类号： B01J25/00 , B01J35/02 , B01J37/00 , C07C231/06
CPC分类号： B01J37/0072 , B01J25/00 , C07C231/065 , B01J35/023
摘要： A molten Raney copper alloy containing copper and a metal selected from Al, Si and Zn as major components and, if necessary, specific metals as minor components is solidified at a cooling rate of not less than 1.times.10.sup.2 K/sec by a rotary water atomizing process, water or gas atomizing process, single roll process or similar process. The Raney copper alloy thus obtained is leached to obtain a Raney copper catalyst. The resultant catalyst exhibits activity several times higher than that of conventional Raney copper catalysts in the reaction of acrylonitrile with water to give acrylamide.
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公开(公告)号：US5922912A
公开(公告)日：1999-07-13
申请号：US834983
申请日：1997-04-07
IPC分类号： B01J31/22 , C07B61/00 , C07C231/06 , C07C231/24 , C07C233/09 , C07C243/10 , C07C253/10 , C07C253/30 , C07C255/07
CPC分类号： C07C231/24 , C07C243/10 , C07C253/30
摘要： A method is disclosed for the concentration of an aqueous acrylamide solution prepared by hydration of acrylonitrile or an aqueous acrylamide solution substantially free of acrylonitrile. The method makes use of a concentration apparatus at least a part of whose solution-contacting section is made of a copper-containing material. The concentration is conducted while introducing an oxygen-containing gas into the apparatus. Use of this method can prevent formation, adhering, accumulation and the like of popcorn polymers inside the concentration apparatus upon concentration of the aqueous acrylamide solution, and can also produce high-quality acrylamide.
摘要翻译： 公开了通过丙烯腈或基本上不含丙烯腈的丙烯酰胺水溶液的水合制备的丙烯酰胺水溶液浓缩的方法。 该方法利用其溶液接触部分的至少一部分由含铜材料制成的浓缩装置。 在将含氧气体引入装置的同时进行浓缩。 使用这种方法可以防止浓缩装置内的爆米花聚合物在丙烯酰胺水溶液浓缩后的形成，粘附，堆积等，并且还可以生产高品质的丙烯酰胺。
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公开(公告)号：US5476883A
公开(公告)日：1995-12-19
申请号：US274453
申请日：1994-07-13
申请人： Takeya Abe , Yoshihiko Kambara
发明人： Takeya Abe , Yoshihiko Kambara
IPC分类号： C07C231/06 , C08L77/00 , C08L23/26
CPC分类号： C07C231/06 , C07C231/065
摘要： This invention provides a process for the preparation of acrylamide. Acrylonitrile is treated through at least two purification steps in which acrylonitrile is brought into contact with a strongly-acidic cation exchange resin and then with a resin having primary and/or secondary amino groups or with activated carbon. The resulting acrylonitrile is subjected to hydration in the presence of a copper-base catalyst. The process of this invention can provide high-quality acrylamide even when acrylonitrile of ordinary quality is used, and permits preparation of a polyacrylamide suitable for use in the production of a coagulant having good water solubility or the like.
摘要翻译： 本发明提供了制备丙烯酰胺的方法。 通过至少两个纯化步骤处理丙烯腈，其中丙烯腈与强酸性阳离子交换树脂接触，然后与具有伯和/或仲氨基或活性炭的树脂接触。 所得丙烯腈在铜基催化剂存在下进行水合。 即使使用普通质量的丙烯腈，本发明的方法也可以提供高质量的丙烯酰胺，并且可以制备适用于生产具有良好的水溶性等的凝结剂的聚丙烯酰胺。
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公开(公告)号：US5254749A
公开(公告)日：1993-10-19
申请号：US741518
申请日：1991-08-09
申请人： Yoshihiko Kambara , Toru Idemoto , Yasuki Ono , Chika Tona
发明人： Yoshihiko Kambara , Toru Idemoto , Yasuki Ono , Chika Tona
CPC分类号： C07C41/09
摘要： The present invention relates to a process for producing dipentaerythritol through the dehydration condensation of pentaerythritol in the presence of an acid catalyst. This production process comprises the step of carrying out the dehydration condensation preferably in the presence of an acid catalyst, and/or the step of lowering the temperature of the reaction mixture before the conversion of pentaerythritol becomes not less than 25%, to stop the reaction so that the concentration of tripentaerythritol formed during the reaction may not be increased, and at the same time to give a reaction mixture containing dipentaerythritol in an increased concentration.
摘要翻译： PCT No.PCT / JP91 / 00004 Sec。 371日期1991年8月9日 102（e）1991年8月9日PCT PCT 1991年1月8日PCT公布。 公开号WO91 / 10633 日本1991年7月25日。本发明涉及通过季戊四醇在酸催化剂存在下的脱水缩合制备二季戊四醇的方法。 该制备方法包括优选在酸催化剂存在下进行脱水缩合的步骤和/或在季戊四醇转化之前将反应混合物的温度降低至不低于25％的步骤，以停止反应 使得在反应期间形成的三季戊四醇的浓度可能不会增加，同时得到浓度增加的含有二季戊四醇的反应混合物。
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