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1. 发明授权

US06200454B1 Process for producing sodium persulfate 有权
标题翻译：生产过硫酸钠的方法
公开(公告)号：US06200454B1
公开(公告)日：2001-03-13
申请号：US09498614
申请日：2000-02-07
申请人： Ken-ichi Kimizuka , Shoichiro Kajiwara , Takamitsu Tsuruga
发明人： Ken-ichi Kimizuka , Shoichiro Kajiwara , Takamitsu Tsuruga
IPC分类号： C25B128
CPC分类号： C25B1/285
摘要： There is disclosed a process for producing sodium persulfate which comprises the step (1) of electrolyzing, at an anode, a solution containing ammonium sulfate, and the step (2) of producing sodium persulfate from the resultant liquid produced at the anode and sodium hydroxide and, as desired, the step of removing sodium sulfate, and further as desired, the step (3) of performing crystallization on the reaction liquid as produced in the step (2). According to the above process, it is made possible to efficiently produce sodium persulfate having a markedly high purity substantially free from nitrogen components at a high yield at a high current efficiency in electrolysis.
摘要翻译：公开了一种生产过硫酸钠的方法，其包括在阳极电解含有硫酸铵的溶液的步骤（1）和从阳极产生的所得液体中生产过硫酸钠的步骤（2）和氢氧化钠根据需要，根据需要进一步根据步骤（2）中制备的对反应液进行结晶的步骤（3）。根据上述方法，可以以高电流效率在电解中以高产率有效地制备基本上不含氮成分的显着高纯度的过硫酸钠。

2. 发明授权

US5489702A Process for the production of dialkyl carbonate 失效
标题翻译：碳酸二烷基酯的制备方法
公开(公告)号：US5489702A
公开(公告)日：1996-02-06
申请号：US286203
申请日：1994-08-05
申请人： Masaharu Doya , Ken-ichi Kimizuka , Yutaka Kanbara
发明人： Masaharu Doya , Ken-ichi Kimizuka , Yutaka Kanbara
IPC分类号： B01J21/10 , B01J23/02 , B01J23/06 , B01J23/14 , C07B61/00 , C07C68/00 , C07C68/06 , C07C69/96 , C07D317/36
CPC分类号： C07D317/36 , C07C68/00 , C07C68/065
摘要： A process for the production of a dialkyl carbonate comprisinga first step of reacting an alkylene glycol, or an alkanediol, with urea in the presence of a catalyst to form an alkylene carbonate or a six-membered cyclic carbonate, anda second step of reacting the alkylene carbonate or the six-membered cyclic carbonate with an alcohol in the presence of a catalyst to obtain a dialkyl carbonate and an alkylene glycol, or a dialkyl carbonate and an alkanediol,wherein the alkylene glycol or the alkanediol obtained in the second step is recycled to the first step.
摘要翻译：一种制备碳酸二烷基酯的方法，包括在催化剂存在下使亚烷基二醇或链烷二醇与脲反应的第一步骤，以形成碳酸亚烃酯或六元环状碳酸酯，第二步是使碳酸亚烃酯或六元环状碳酸酯与醇在催化剂存在下反应，得到碳酸二烷基酯和亚烷基二醇或碳酸二烷基酯和链烷二醇，其中第二步得到的亚烷基二醇或链烷二醇是回收到第一步。

3. 发明授权

US5440004A Method and apparatus for the production of alkylene carbonate 失效
标题翻译：用于生产碳酸亚烷基酯的方法和装置
公开(公告)号：US5440004A
公开(公告)日：1995-08-08
申请号：US238743
申请日：1994-05-05
申请人： Masaharu Doya , Yutaka Kanbara , Ken-ichi Kimizuka , Takashi Okawa
发明人： Masaharu Doya , Yutaka Kanbara , Ken-ichi Kimizuka , Takashi Okawa
IPC分类号： C07D317/36 , C08G64/00
CPC分类号： C07D317/36
摘要： A method for the production of an alkylene carbonate at high yields and high selectivity by a reaction between an alkylene glycol and urea, the method being capable to preventing the deposition of a white crystal in the reflux condenser used in a conventional method for the production of alkylene carbonate and the subsequent decrease in the yield, wherein:a gas washing member and a cooling member are disposed above a reaction portion where alkylene glycol and urea are allowed to react,ammonia-containing steam exhausted from the reaction portion is downwardly introduced into the cooling member through the gas washing member,condensate and ammonia gas exhausted from a bottom of the cooling member are gas-liquid separated,the condensate is introduced into the gas washing member, andthe ammonia gas is removed from the reaction system.
摘要翻译：一种通过亚烷基二醇和尿素之间的反应以高产率和高选择性生产碳酸亚烷基酯的方法，该方法能够防止白色结晶沉积在用于生产碳酸亚烷基酯和随后的产率降低，其中：气体洗涤部件和冷却部件设置在使亚烷基二醇和尿素反应的反应部分上方，从反应部分排出的含氨蒸气被向下引入通过气体洗涤部件的冷却部件，从冷却部件的底部排出的冷凝物和氨气体被气液分离，将冷凝物引入到气体洗涤部件中，从反应体系中除去氨气。

4. 发明授权

US06214197B1 Process for producing persulfate 有权
标题翻译：生产过硫酸盐的方法
公开(公告)号：US06214197B1
公开(公告)日：2001-04-10
申请号：US09275026
申请日：1999-03-24
申请人： Ken-ichi Kimizuka , Shoichiro Kajiwara , Takamitsu Tsuruga
发明人： Ken-ichi Kimizuka , Shoichiro Kajiwara , Takamitsu Tsuruga
IPC分类号： C25B128
CPC分类号： C25B1/285
摘要： There are disclosed (1) a process for producing ammonium persulfate which comprises electrolyzing, as the starting raw material for an anode, an aqueous solution containing ammonium sulfate wherein ammonium ions are present in an amount of at least one equivalent based on sulfate ions; (2) a process for producing sodium persulfate which comprises the step (A) of electrolyzing an aqueous solution containing ammonium sulfate at an anode, the step (B) of producing sodium persulfate, the step (C) of crystallizing and separating the sodium persulfate and the step (D) of recycling the liquid produced at a cathode together with ammonia for use as the starting raw material for an anode in the step (A); and (3) a process for producing potassium persulfate which comprises the step (A′) of electrolyzing an aqueous solution containing ammonium sulfate at an anode; and the step (B′) of producing potassium persulfate. The above processes are capable of effectively producing respective persulfates in an industrially advantageous manner.
摘要翻译：公开了（1）一种生产过硫酸铵的方法，该方法包括电解作为阳极起始原料的含有硫酸铵的水溶液，其中铵离子以基于硫酸根离子的至少一当量存在; （2）一种生产过硫酸钠的方法，其包括在阳极电解含有硫酸铵的水溶液的步骤（A），制备过硫酸钠的步骤（B），将过硫酸钠结晶和分离的步骤（C）以及在步骤（A）中将在阴极处产生的液体与氨一起再循环以用作阳极的起始原料的步骤（D）; （3）生产过硫酸钾的方法，其包括在阳极电解含有硫酸铵的水溶液的步骤（A'）; 和生产过硫酸钾的步骤（B'）。上述方法能够以工业上有利的方式有效地生产各自的过硫酸盐。

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