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1. 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。

2. 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。

3. 发明授权

US06491807B2 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：US06491807B2
公开(公告)日：2002-12-10
申请号：US09789756
申请日：2001-02-22
申请人： Kenichi Kimizuka , Shoichiro Kajiwara , Naoki Kogure , Takamitsu Tsuruga
发明人： Kenichi Kimizuka , Shoichiro Kajiwara , Naoki Kogure , Takamitsu Tsuruga
IPC分类号： C25D900
CPC分类号： C25B1/285 , C25B15/08
摘要： An electrolytic production of sodium persulfate in a decreased number of steps with low unit power cost is described. Sodium persulfate is caused to crystallize by the reaction between an anode product and sodium hydroxide. The resulting sodium persulfate slurry is separated into a mother liquor and sodium persulfate crystals which are recovered and dried to obtain product sodium persulfate. In the process of the invention, ammonia liberated in the reaction-type crystallization of sodium persulfate is recovered into a cathode product, which is then neutralized by sodium hydroxide and/or ammonia. The neutralized solution is combined with sodium sulfate recovered from the mother liquor after recovering the sodium persulfate crystals and reused as a part of the starting material for an anolyte feed solution.
摘要翻译：描述了以较低的单位功率成本降低步数的电解生产过硫酸钠。通过阳极产物和氢氧化钠之间的反应使过硫酸钠结晶。将所得的过硫酸钠浆液分离成母液和过硫酸钠晶体，将其回收并干燥，得到过硫酸钠。在本发明的方法中，将过硫酸钠的反应型结晶中释放的氨回收到阴极产物中，然后用氢氧化钠和/或氨中和。在回收过硫酸钠晶体后，将中和的溶液与从母液中回收的硫酸钠合并，并重新用作阳极电解液进料溶液的起始原料的一部分。

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