公开(公告)号：US5480571A

公开(公告)日：1996-01-02

申请号：US309743

申请日：1994-09-21

申请人： Masaru Isoai ,  Tosiharu Harada ,  Tokihiro Kurata ,  Kazuhiro Fujita ,  Kazushi Takama ,  Shigekazu Jikuhara

发明人： Masaru Isoai ,  Tosiharu Harada ,  Tokihiro Kurata ,  Kazuhiro Fujita ,  Kazushi Takama ,  Shigekazu Jikuhara

IPC分类号： C01G49/06 ,  C01G49/08

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C01G49/08 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/42

摘要： Disclosed herein are a process for producing acicular goethite particles comprising the step off: blowing an oxygen-containing gas into a ferrous salt reaction solution containing colloidal ferrous hydroxide or iron-containing colloidal precipitates which is obtained by reacting an aqueous ferrous salt solution with less than one equivalent of an aqueous alkali hydroxide solution, an aqueous alkali carbonate solution, or an aqueous alkali hydroxide and alkali carbonate solution based on Fe.sup.2+ in said aqueous ferrous salt solution, in the presence of ascorbic acid or a salt thereof so as to oxidize said colloidal ferrous hydroxide or iron-containing colloidal precipitates and to produce acicular goethite particles throught green rust; and a process for producing acicular magnetic iron oxide particles by reducing the acicular goethite particles obtained in the above process to produce acicular magnetite particles, and if necessary, oxidizing the acicular magnetite particles to obtain acicular maghemite particles, and if necessary, modifying the acicular magnetite or maghemite particles with Co or Co and Fe.sup.2+.

摘要翻译： 本文公开了一种制备针状针铁矿颗粒的方法，包括以下步骤：将含氧气体吹入含有胶态氢氧化亚铁或含铁胶体沉淀物的亚铁盐反应溶液中，该溶液通过使亚铁盐水溶液与小于 一种碱金属氢氧化物水溶液，碱金属碳酸盐水溶液或碱金属氢氧化物和碱金属碳酸盐水溶液中，在所述含水亚铁盐水溶液中，在抗坏血酸或其盐的存在下，氧化所述胶体 含氢氧化铁或含铁胶体沉淀物，并通过绿锈生成针状针铁矿颗粒; 以及通过将上述方法中得到的针状针铁矿粒子还原而制造针状磁性氧化铁粒子的方法，制造针状磁铁矿粒子，根据需要，根据需要氧化针状磁铁矿粒子，得到针状磁赤铁矿粒子，根据需要，对针状磁铁矿 或具有Co或Co和Fe2 +的磁赤铁矿颗粒。

公开(公告)号：US5378380A

公开(公告)日：1995-01-03

申请号：US22847

申请日：1993-02-25

申请人： Masaru Isoai ,  Tosiharu Harada ,  Tokihiro Kurata ,  Kazuhiro Fujita ,  Kazushi Takama ,  Shigekazu Jikuhara

发明人： Masaru Isoai ,  Tosiharu Harada ,  Tokihiro Kurata ,  Kazuhiro Fujita ,  Kazushi Takama ,  Shigekazu Jikuhara

IPC分类号： C01G49/06 ,  C01G49/08

CPC分类号： B82Y30/00 ,  C01G49/06 ,  C01G49/08 ,  C01P2004/03 ,  C01P2004/10 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/42

摘要： Disclosed herein are a process for producing acicular goethite particles comprising the step of: blowing an oxygen-containing gas into a ferrous salt reaction solution containing colloidal ferrous hydroxide or iron-containing colloidal precipitates which is obtained by reacting an aqueous ferrous salt solution with less than one equivalent of an aqueous alkali hydroxide solution, an aqueous alkali carbonate solution, or an aqueous alkali hydroxide and alkali carbonate solution based on Fe.sup.2+ in said aqueous ferrous salt solution, in the presence of ascorbic acid or a salt thereof so as to oxidize said colloidal ferrous hydroxide or iron-containing colloidal precipitates and to produce acicular goethite particles throught green rust; and a process for producing acicular magnetic iron oxide particles by reducing the acicular goethite particles obtained in the above process to produce acicular magnetite particles, and if necessary, oxidizing the acicular magnetite particles to obtain acicular maghemite particles, and if necessary, modifying the acicular magnetite or maghemite particles with Co or Co and Fe.sup.2+.

摘要翻译： 本文公开了一种制备针状针铁矿颗粒的方法，包括以下步骤：将含氧气体吹入含有胶态氢氧化亚铁或含铁胶体沉淀物的亚铁盐反应溶液中，该溶液通过使亚铁盐水溶液与小于 一种碱金属氢氧化物水溶液，碱金属碳酸盐水溶液或碱金属氢氧化物和碱金属碳酸盐水溶液中，在所述含水亚铁盐水溶液中，在抗坏血酸或其盐的存在下，氧化所述胶体 含氢氧化铁或含铁胶体沉淀物，并通过绿锈生成针状针铁矿颗粒; 以及通过将上述方法中得到的针状针铁矿粒子还原而制造针状磁性氧化铁粒子的方法，制造针状磁铁矿粒子，根据需要，根据需要氧化针状磁铁矿粒子，得到针状磁赤铁矿粒子，根据需要，对针状磁铁矿 或具有Co或Co和Fe2 +的磁赤铁矿颗粒。

公开(公告)号：US20050214538A1

公开(公告)日：2005-09-29

申请号：US11084206

申请日：2005-03-21

申请人： Toshiki Matsui ,  Yasuhiko Fujii ,  Tomoko Okita ,  Minoru Ohsugi ,  Shigekazu Jikuhara

发明人： Toshiki Matsui ,  Yasuhiko Fujii ,  Tomoko Okita ,  Minoru Ohsugi ,  Shigekazu Jikuhara

IPC分类号： C08J3/22 ,  C08K9/02 ,  C08K9/12 ,  C08L101/02 ,  B32B5/16

CPC分类号： C08J3/226 ,  C08K9/02 ,  Y10T428/2991

摘要： A master batch pellet comprises a thermoplastic resin and 2.0 to 60% by weight of a white combustion catalyst blended in the thermoplastic resin, the white combustion catalyst comprising composite particles obtained by carrying 0.001 to 0.10% by weight of metallic Pd colloid particles having an average particle diameter of not more than 10 nm on surface of respective inorganic carrier particles having an average particle diameter of 0.1 to 1.0 μm and composed of at least one selected from the group consisting of aluminum oxide, silicon oxide, calcium carbonate and titanium oxide. The master batch pellet of the present invention is suitable for producing a thermoplastic resin composition exhibiting an excellent combustion-promoting effect, more specifically a thermoplastic resin composition which is promoted in complete combustion upon incineration thereof and effectively inhibited from generating harmful organic substances.

摘要翻译： 母料粒料包含热塑性树脂和2.0至60重量％的混合在热塑性树脂中的白色燃烧催化剂，所述白色燃烧催化剂包含通过将0.001至0.10重量％的具有平均值的金属Pd胶体颗粒 平均粒径为0.1〜1.0μm的各种无机载体颗粒的表面上的粒径不大于10nm，由选自氧化铝，氧化硅，碳酸钙和氧化钛中的至少一种构成。 本发明的母料颗粒适用于制造显示出优异的助燃效果的热塑性树脂组合物，更具体地说是在焚烧时促进完全燃烧的热塑性树脂组合物，并有效地抑制了产生有害有机物质。