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公开(公告)号：US5322760A
公开(公告)日：1994-06-21
申请号：US800427
申请日：1991-11-29
申请人： Yuzo Itoh , Atsushi Kakuta , Akio Mukoh
发明人： Yuzo Itoh , Atsushi Kakuta , Akio Mukoh
CPC分类号： B82Y20/00 , C07D487/22 , G02F1/3618
摘要： A nonlinear optical element comprising a tetraazaporphyrin compound represented by the formula (I): ##STR1## This nonlinear optical element is excellent in that it is improved over low switching speed of the conventional inorganic materials and over small nonlinearity and poor chemical and physical stability and workability of the conventional organic materials.
摘要翻译： 包含由式（I）表示的四氮杂卟啉化合物的非线性光学元件：优于常规无机材料的低切换速度和小的非线性以及常规有机材料的较小的化学和物理稳定性和可加工性的改进。
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2.发明授权
公开(公告)号：US4101638A
公开(公告)日：1978-07-18
申请号：US710741
申请日：1976-08-02
申请人： Takasuke Inoue , Yuzo Itoh , Sataro Nakajima , Shin-Ichi Tajika , Yoshio Saiki
发明人： Takasuke Inoue , Yuzo Itoh , Sataro Nakajima , Shin-Ichi Tajika , Yoshio Saiki
IPC分类号： C01B25/226 , C01B25/22 , C01B25/229 , C01F11/46 , C01B25/16
CPC分类号： C01B25/22
摘要： The present invention relates to a wet process for the manufacture of phosphoric acid, which process essentially comprises a digestion step in which phosphate rock is digested by means of phosphoric acid and sulfuric acid to form a slurry containing highly concentrated phosphoric acid together with calcium sulfate hemihydrate, and a separation step in which the slurry is filtered for separation of calcium sulfate hemihydrate from the highly concentrated phosphoric acid (in which the concentration of P205 in the product acid is higher than 40% by weight, based on the weight of the product acid) and which is characterized by supplying active silica at a ratio of 0.2-5% by weight, based on the weight of phosphate rock, in order that active silica may be present in the above mentioned digestion step.
摘要翻译： 本发明涉及一种用于制造磷酸的湿法，该方法基本上包括消化步骤，其中磷酸盐岩通过磷酸和硫酸消化以形成含有高浓度磷酸的浆液以及半水合硫酸钙 和分离步骤，其中过滤浆料以从高度浓缩的磷酸中分离出硫酸钙半水合物（其中产物酸中的P205的浓度高于40重量％，基于产物酸的重量 ），其特征在于以0.2-5重量％的比例以磷酸盐岩的重量供给活性二氧化硅，以便活性二氧化硅可以存在于上述消化步骤中。
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