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1. 发明授权

US07056418B2 Cooking method for pulp 有权
公开(公告)号：US07056418B2
公开(公告)日：2006-06-06
申请号：US10015704
申请日：2001-12-17
申请人： Tatsuya Andoh , Junji Tanaka , Keigo Watanabe , Yasunori Nanri , Makoto Nakao
发明人： Tatsuya Andoh , Junji Tanaka , Keigo Watanabe , Yasunori Nanri , Makoto Nakao
IPC分类号： D21C3/02 , D21C3/20
CPC分类号： D21C3/022 , D21C3/222
摘要： A lignocellulose material is cooked by means of an alkaline cooking liquor containing polysulfides in the presence of a quinone-hydroquinone compound, of which the oxidation-reduction potential in the form present during the cooking, which potential is a value calculated as a standard oxidation-reduction potential (Ea) with a hydrogen ion activity of 1, is within a range of from 0.12 to 0.25V to the standard hydrogen electrode potential. It is thereby possible to cook the lignocellulose material with a low Kappa number and in good yield and at the same time, to reduce the amount of the chemical solution used and to reduce the load on a recovery boiler.

2. 发明授权

US06585880B1 Method for recovering chemicals in a process of producing pulp by kraft process 有权
标题翻译：通过牛皮纸工艺生产纸浆的方法中回收化学品的方法
公开(公告)号：US06585880B1
公开(公告)日：2003-07-01
申请号：US09926643
申请日：2001-11-28
申请人： Keigo Watanabe , Yasunori Nanri , Kazuaki Sakai , Tatsuya Andoh , Makoto Nakao
发明人： Keigo Watanabe , Yasunori Nanri , Kazuaki Sakai , Tatsuya Andoh , Makoto Nakao
IPC分类号： C02F1461
CPC分类号： D21C3/022 , D21C11/0021 , D21C11/0057 , D21C11/04
摘要： In a process for producing kraft pulp, the process is made closed, the yield of pulp is improved and environmental problems are minimized. An alkaline solution containing Na2S which flows in a process of producing kraft pulp, is electrolyzed by an electrolytic oxidation method; a liquid which is formed at an anode side and contains a polysulfide type sulfur in an amount of 6 g/l or more, is added, as it is or after being causticized, to the process before a chip has the maximum temperature, and a NaOH solution formed at a cathode side, is added to at least one step of the process after the chip has the maximum temperature till a final bleaching stage; and at least chemicals in the step wherein NaOH is added, among chemicals discharged in all steps from a cooking step till the final bleaching stage, are recovered and reused.
摘要翻译：在生产牛皮纸浆的过程中，封闭了该方法，提高了纸浆的产量，并使环境问题最小化。在生产牛皮纸浆的过程中流过含有Na 2 S的碱性溶液通过电解氧化法进行电解; 在芯片具有最高温度之前的过程中，将其在阳极侧形成并含有6g / l以上的多硫化物硫的液体按原样或苛化后加入到在芯片具有最高温度直到最终漂白阶段之后，在阴极侧形成的NaOH溶液加入到该工艺的至少一个步骤中; 并且在从烹饪步骤到最终漂白阶段的所有步骤中排出的化学品中回收并重新使用在添加NaOH的步骤中的至少一种化学品。

3. 发明授权

US06264819B1 Method for producing polysulfide by electrolytic oxidation 有权
标题翻译：通过电解氧化制备多硫化物的方法
公开(公告)号：US06264819B1
公开(公告)日：2001-07-24
申请号：US09463581
申请日：2000-01-28
申请人： Tatsuya Andoh , Junji Tanaka , Tetsuji Shimohira
发明人： Tatsuya Andoh , Junji Tanaka , Tetsuji Shimohira
IPC分类号： C25B100
CPC分类号： C01B17/34 , D21C11/0057 , D21C11/04
摘要： It is an object of the present invention to produce a cooking liquor containing polysulfide sulfur at a high concentration from white liquor in a pulp production process with a high selectivity at a low electric power with very little production of thiosulfate ions as by-product. The present invention provides a method for producing polysulfides, which comprises introducing a solution containing sulfide ions into an anode compartment of an electrolytic cell comprising the anode compartment provided with a porous anode, a cathode compartment provided with a cathode and a diaphragm partitioning the anode compartment and the cathode compartment, for electrolytic oxidation to obtain polysulfide ions, wherein at least the surface of said anode is made of nickel, and the porous anode has a physically continuous three-dimensional network structure.
摘要翻译：本发明的一个目的是在低产能下以极少的硫代硫酸根离子的产生量生产含有高选择性的纸浆生产过程中从白液中高浓度的多硫化硫。本发明提供一种生产多硫化物的方法，其包括将含有硫化物离子的溶液引入电解池的阳极室中，所述阳极室包括设有多孔阳极的阳极室，设有阴极的阴极室和分隔阳极室和阴极室，用于电解氧化以获得多硫化物离子，其中至少所述阳极的表面由镍制成，并且所述多孔阳极具有物理上连续的三维网络结构。

4. 发明授权

US06517699B2 Method for producing polysulfides by means of electrolytic oxidation 有权
标题翻译：通过电解氧化制备多硫化物的方法
公开(公告)号：US06517699B2
公开(公告)日：2003-02-11
申请号：US09938579
申请日：2001-08-27
申请人： Tetsuji Shimohira , Tatsuya Andoh , Junji Tanaka , Keigo Watanabe , Yasunori Nanri
发明人： Tetsuji Shimohira , Tatsuya Andoh , Junji Tanaka , Keigo Watanabe , Yasunori Nanri
IPC分类号： C25B300
CPC分类号： D21C11/0078 , D21C11/0057
摘要： The present invention has an object to obtain a cooking liquor containing polysulfide-sulfur at a high concentration by minimizing by-production of thiosulfate ions. The present invention is a method for producing polysulfides, which comprises introducing a solution containing sulfide ions into an anode compartment of an electrolytic cell comprising the anode compartment provided with a porous anode, a cathode compartment provided with a cathode, and a diaphragm partitioning the anode compartment and the cathode compartment, for electrolytic oxidation to obtain polysulfide ions, characterized in that the porous anode is disposed so that a space is provided at least partly between the porous anode and the diaphragm, and the apparent volume of the porous anode is from 60% to 99% based on the volume of the anode compartment.
摘要翻译：本发明的目的是通过使硫代硫酸根离子的副产物最小化来获得含有高浓度的多硫化物 - 硫的蒸煮液。本发明是一种多硫化物的制造方法，其特征在于，将包含硫化物离子的溶液引入到电解槽的阳极室内，所述电解槽包括设有多孔阳极的阳极室，设有阴极的阴极室和分隔阳极的隔膜隔室和阴极室，用于电解氧化以获得多硫化物离子，其特征在于，所述多孔阳极被设置为使得至少部分地在所述多孔阳极和所述隔膜之间提供空间，并且所述多孔阳极的表观体积为60 基于阳极室的体积％至99％。

5. 发明授权

US5972197A Method for producing polysulfides by electrolytic oxidation 失效
标题翻译：通过电解氧化制备多硫化物的方法
公开(公告)号：US5972197A
公开(公告)日：1999-10-26
申请号：US973756
申请日：1997-12-23
申请人： Tatsuya Andoh , Tetsuji Shimohira , Eiji Endoh
发明人： Tatsuya Andoh , Tetsuji Shimohira , Eiji Endoh
IPC分类号： C01B17/34 , C25B1/00 , C25B1/22 , D21C11/00 , D21C11/04 , C01B17/18
CPC分类号： D21C11/0057 , D21C11/0078
摘要： A method for producing polysulfides, which comprises introducing a solution containing sulfide ions into an anode compartment of an electrolytic cell comprising the anode compartment provided with a porous anode, of which at least the surface is made of carbon, a cathode compartment provided with a cathode, and a diaphragm partitioning the anode compartment and the cathode compartment, and carrying out electrolytic oxidation to obtain polysulfide ions.
摘要翻译： PCT No.PCT / JP97 / 01456 Sec。 371 1997年12月23日第 102（e）日期1997年12月23日PCT 1997年4月25日PCT PCT。公开号WO97 / 41295 日期1997年11月6日制造多硫化物的方法，其包括将含有硫化物离子的溶液引入到电解槽的阳极室中，所述阳极室包括具有多孔阳极的阳极室，其至少表面由碳制成，阴极设置有阴极的隔室和分隔阳极室和阴极室的隔膜，并进行电解氧化以获得多硫化物离子。

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