公开(公告)号：US08529963B2

公开(公告)日：2013-09-10

申请号：US12811985

申请日：2009-01-09

Applicant: Dan V. Goia ,  Benjamin Morrow ,  Egon Matijevic ,  Krishna Balantrapu ,  Brendan P. Farrell

Inventor： Dan V. Goia ,  Benjamin Morrow ,  Egon Matijevic ,  Krishna Balantrapu ,  Brendan P. Farrell

IPC: A61K9/14 ,  A61K31/28 ,  A61K33/24 ,  A61K33/26 ,  A61K33/38

CPC classification number: B01J13/0043 ,  B22F1/0022 ,  B22F9/24 ,  B82Y30/00

Abstract: The present invention is directed to a method for preparing colloidal dispersions of precious metal nanoparticles selected from the group consisting of Pt, Au, Pd, Ag, Rh, Ru and mixtures or alloys thereof, and to a method for isolating such precious metal nanoparticles from these colloidal dispersions. The colloidal dispersions are prepared by reducing suitable precious metal precursor compounds in aqueous alkaline solutions at reaction temperatures between 40 and 70° C. and a pH≧12.0 in the presence of polysaccharides with average molecular weights (Mw) in the range of 300,000 to 1,000,000. The precious metal nanoparticles are isolated after decomposing the polysaccharide by heating the colloidal dispersions to temperatures >80° C. The nanoparticles can be used for the manufacture of core/shell-type catalyst materials and for electronic, decorative and medical applications.

Abstract translation: 本发明涉及一种制备选自Pt，Au，Pd，Ag，Rh，Ru及其混合物或合金的贵金属纳米颗粒的胶体分散体的方法，以及用于分离这些贵金属纳米颗粒的方法 这些胶体分散体。 胶体分散体是通过在40〜70℃的反应温度下，在碱性水溶液中还原合适的贵金属前体化合物，在平均分子量（Mw）范围为30万〜 1,000,000。 通过将胶体分散体加热至80℃以上，分解多糖后，分离出贵金属纳米粒子。纳米颗粒可用于制造核/壳型催化剂材料以及电子，装饰和医疗应用。

公开(公告)号：US20110064825A1

公开(公告)日：2011-03-17

申请号：US12811985

申请日：2009-01-09

Applicant: Dan V. Goia ,  Benjamin Morrow ,  Egon Matijevic ,  Krishna Balantrapu ,  Brendan P. Farrell

Inventor： Dan V. Goia ,  Benjamin Morrow ,  Egon Matijevic ,  Krishna Balantrapu ,  Brendan P. Farrell

IPC: B22F9/24 ,  A61K33/24 ,  A61K33/38 ,  H01B1/02 ,  B01J31/02 ,  C09D105/00 ,  C22C5/04 ,  C22C5/06 ,  C22C5/02 ,  B82Y40/00 ,  B82Y5/00

CPC classification number: B01J13/0043 ,  B22F1/0022 ,  B22F9/24 ,  B82Y30/00

Abstract: The present invention is directed to a method for preparing colloidal dispersions of precious metal nanoparticles selected from the group consisting of Pt, Au, Pd, Ag, Rh, Ru and mixtures or alloys thereof, and to a method for isolating such precious metal nanoparticles from these colloidal dispersions. The colloidal dispersions are prepared by reducing suitable precious metal precursor compounds in aqueous alkaline solutions at reaction temperatures between 40 and 70° C. and a pH≧12.0 in the presence of polysaccharides with average molecular weights (Mw) in the range of 300,000 to 1,000,000. The precious metal nanoparticles are isolated after decomposing the polysaccharide by heating the colloidal dispersions to temperatures >80° C. The nanoparticles can be used for the manufacture of core/shell-type catalyst materials and for electronic, decorative and medical applications.

Abstract translation: 本发明涉及一种制备选自Pt，Au，Pd，Ag，Rh，Ru及其混合物或合金的贵金属纳米颗粒的胶体分散体的方法，以及用于分离这些贵金属纳米颗粒的方法 这些胶体分散体。 胶体分散体是通过在反应温度在40-70℃之间的碱性水溶液中还原合适的贵金属前体化合物，在平均分子量（Mw）在30万至1,000,000范围内的多糖存在下的pH≥12.0来制备的 。 通过将胶体分散体加热至80℃以上，分解多糖后，分离出贵金属纳米粒子。纳米颗粒可用于制造核/壳型催化剂材料以及电子，装饰和医疗应用。

公开(公告)号：US5318628A

公开(公告)日：1994-06-07

申请号：US985895

申请日：1992-12-04

Applicant: Egon Matijevic ,  Wan P. Hsu ,  Manfred R. Kuehnle

Inventor： Egon Matijevic ,  Wan P. Hsu ,  Manfred R. Kuehnle

IPC: C09B67/08 ,  C09B67/20 ,  C09B67/22 ,  C09C1/00 ,  C09D7/12 ,  C09D11/02 ,  C09D201/00 ,  C08K5/00

CPC classification number: C09D7/1225 ,  C09B67/0013 ,  C09B67/0033 ,  C09D11/037 ,  C09D7/1291 ,  C08K3/0033 ,  C08K9/00

Abstract: A method of making synthetic color pigments comprises synthesizing monodispersed colloidal core particles by precipitation from a solution and applying dye material to the core particles either by adsorption directly into the core particles or by adsorption or incorporation into alumina fixation shells at the surfaces of the core particles. Additional functional shells may be applied to the dyed core particles for various reasons. The pigments are useful for the coloration of various media such as printing inks and paint compositions.

公开(公告)号：US4241042A

公开(公告)日：1980-12-23

申请号：US916883

申请日：1978-06-19

Applicant: Egon Matijevic ,  Mario Visca

Inventor： Egon Matijevic ,  Mario Visca

IPC: C01G23/047 ,  C01G23/053

CPC classification number: B82Y30/00 ,  C01G23/053 ,  C01G23/0538 ,  C01P2004/03 ,  C01P2004/04 ,  C01P2004/32 ,  C01P2004/52 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64

Abstract: Titanium dioxide, in the form of discrete, solid substantially spherical particles of a substantially uniform shape and size, is obtained by providing an aerosol comprising discrete liquid particles of a hydrolyzable titanium compound, contacting the aerosol with water vapor in dynamic flow to hydrolyze the liquid titanium (IV) compound to titanium dioxide, and recovering the desired product.

Abstract translation: 通过提供包含可分解的钛化合物的离散液体颗粒的气溶胶，以动态流动的方式将气溶胶与水蒸气接触以水解液体，从而获得基本上均匀形状和尺寸的离散固体基本上为球形的颗粒形式的二氧化钛 钛（IV）化合物与二氧化钛反应，并回收所需产物。

公开(公告)号：US5900223A

公开(公告)日：1999-05-04

申请号：US748719

申请日：1996-11-14

Applicant: Egon Matijevic ,  Yie-Shein Her

Inventor： Egon Matijevic ,  Yie-Shein Her

IPC: C01G19/00 ,  C01B13/36 ,  C01F17/00 ,  C01G23/00 ,  C01G25/02 ,  C01G27/00 ,  C01G33/00 ,  C01G35/00 ,  C04B35/00 ,  C01F13/14

CPC classification number: B82Y30/00 ,  C01B13/363 ,  C01G23/006 ,  C01G33/00 ,  C01P2002/34 ,  C01P2002/54 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/52 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/20 ,  C01P2006/32 ,  C01P2006/40 ,  Y10S977/776

Abstract: A process for the preparation of crystalline perovskite powders consisting essentially of primary particles uniform in nanometer or micrometer size and uniform and near spherical shape and of narrow size distribution, of the general formula A.sub.x (BO.sub.3).sub.y, wherein cation A is at least one metal selected from the group comprising Li.sup.+, Na.sup.+, K.sup.+, Mg.sup.2+, Ca.sup.2+, Sr.sup.2+, Ba.sup.2+ and La.sup.3+ and B in the anion (BO.sub.3) is at least one metal selected from the group consisting of Ti.sup.4+, Zr.sup.4+, Sn.sup.4+, Hf.sup.4+, Nb.sup.5+ and Ta.sup.5+, x is equal to the valence of the anion (BO.sub.3) and y is equal to the valence of cation (A), comprising contacting, under stirring, an aqueous solution (I) containing inorganic or organic salts or organometallic compounds of at least one metal A and of at least one metal B, the ratio (A)/(B) being around the stoichiometric value corresponding to the above general formula, with an aqueous basic solution (II) containing an inorganic or organic base in an amount at least above the stoichiometric amount corresponding to the above general formula, preheated to 70.degree.-100.degree. C., and performing the process at temperatures of from 70.degree. to 100.degree. C. while maintaining the reaction mixture at constant OH.sup.- concentration.

Abstract translation: 一种用于制备基本上由通式Ax（BO 3）y的纳米或微米尺寸均匀且均匀和接近球形和窄尺寸分布的初级颗粒组成的结晶钙钛矿粉末的方法，其中阳离子A是至少一种金属 选自由阴离子（BO3）中的Li +，Na +，K +，Mg2 +，Ca2 +，Sr2 +，Ba2 +和La3 +和B组成的组中的至少一种选自Ti4 +，Zr4 +，Sn4 +，Hf4 +，Nb5 +和Ta5 + x等于阴离子（BO3）的化合价，y等于阳离子（A）的化合价，包括在搅拌下使含有无机或有机盐或至少一种的有机金属化合物的水溶液（I）接触 金属A和至少一种金属B，比率（A）/（B）在与上述通式对应的化学计量值的范围内，与含有无机或有机碱的碱性水溶液（II）的含量至少为 高于化学计量量 响应上述通式，预热至70℃-100℃，并在70℃至100℃的温度下进行该过程，同时将反应混合物保持在恒定的OH-浓度。

公开(公告)号：US5248556A

公开(公告)日：1993-09-28

申请号：US792791

申请日：1991-11-15

Applicant: Egon Matijevic ,  Peter Hsu ,  Manfred R. Kuehnle

Inventor： Egon Matijevic ,  Peter Hsu ,  Manfred R. Kuehnle

IPC: C09C1/30 ,  C09C3/06 ,  D21H21/54

CPC classification number: C09C3/063 ,  C09C1/3054 ,  D21H21/54 ,  C01P2002/84 ,  C01P2004/04 ,  C01P2004/32 ,  C01P2004/52 ,  C01P2004/62 ,  C01P2004/84 ,  C01P2006/60 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2996

Abstract: Whitener pigment particles that offer good hiding power consist of particles having a uniform shape (preferably spherical) and varying only slightly in dimension. The particles consist of an inexpensive, readily manufacturable core material which is surrounded by one or more thin, concentric layers or shells, one of which is titania. The core provides the central mechanical support for the shells. In addition to the titania shell, layers can be added to provide compatibility with the carrier in which the particles are dispersed and promote phase transformation. Also described is a production method and apparatus for generating large quantities of the particles.

Abstract translation: 提供良好遮盖力的增白剂颜料颗粒由具有均匀形状（优选为球形）且仅略微变化的颗粒组成。 颗粒由廉价的，容易制造的芯材料组成，其由一个或多个薄的同心层或壳包围，其中之一是二氧化钛。 核心为壳提供中心机械支撑。 除了二氧化钛壳外，可以加入层以提供与其中分散颗粒的载体的相容性并促进相变。 还描述了用于产生大量颗粒的生产方法和装置。

公开(公告)号：US4675251A

公开(公告)日：1987-06-23

申请号：US829962

申请日：1986-02-18

Applicant: Egon Matijevic ,  Paola Gherardi

Inventor： Egon Matijevic ,  Paola Gherardi

IPC: C09C1/00 ,  B01J21/06 ,  C01G23/00 ,  C09C1/36 ,  B32B19/04

CPC classification number: B82Y30/00 ,  B01J21/063 ,  C09C1/3661 ,  C01P2002/52 ,  C01P2002/70 ,  C01P2004/04 ,  C01P2004/32 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2004/64 ,  C01P2004/82 ,  C01P2004/86 ,  C01P2006/12 ,  C01P2006/42 ,  C01P2006/60 ,  Y10T428/2993

Abstract: Spherical particles having sizes below 1 .mu.m, or at maximum of 3.04 .mu.m, a narrow size size distribution consisting, or consisting essentially, of TiO.sub.2 coated by a uniform layer having a thickness up to 400 .ANG. consisting essentially .alpha.-, or .gamma.-Fe.sub.2 O.sub.3, or magnetite, or mixtures thereof, said particles being prepared by a process consisting, or consisting essentially, in the precipitation of the oxide from Fe (III) salt solutions on the surface of solid pre-formed TiO.sub.2 particles having a narrow size distribution and a number average diameter below 1 .mu.m or .ltoreq.3 .mu.m, the Fe (III) concentration being .ltoreq.40% by weight calculated on TiO.sub.2, the pH of the suspension ranging from 1.0 to 2.8, extremes excluded, by heating the suspensions to temperatures of from 80.degree. to 100.degree. C., and by aging them under such conditions for at least 30 minutes.

Abstract translation: 尺寸小于1μm，或最大为3.04μm的球形颗粒，窄尺寸尺寸分布由基本上由厚度达400的均匀层涂覆的TiO 2组成或基本上由基本上由α-或γ- Fe 2 O 3或磁铁矿或其混合物，所述颗粒通过由具有窄尺寸分布的固体预形成TiO 2颗粒表面上的Fe（III）盐溶液中的氧化物沉淀而形成或基本上由其组成的方法制备 和数均平均直径小于1微米或

公开(公告)号：US20070101822A1

公开(公告)日：2007-05-10

申请号：US11266495

申请日：2005-11-04

Applicant: Yasumasa Hattori ,  Egon Matijevic

Inventor： Yasumasa Hattori ,  Egon Matijevic

IPC: B22F9/22

CPC classification number: B22F9/22 ,  B22F1/0018 ,  B22F2001/0033 ,  B22F2998/00 ,  B82Y30/00 ,  B22F1/0055 ,  B22F2201/013 ,  B22F2201/02

Abstract: An efficient process for producing fine nickel powder, capable of metallizing the powder at low temperature to prevent its sintering, and fine nickel powder produced by the process, composed of particles having a flat shape, diameter of limited variations and uniform thickness, and suitable for internal electrodes for laminate ceramic capacitors of high electric capacity. The process comprises a step for forming a nickel compound coated with gelatin by adsorbing gelatin on preformed nickel compound particles with different size and shape (Step (A)), and another step for converting said nickel compound coated with gelatin into fine particles containing metallic nickel and nickel oxide by heating the nickel compound coated with gelatin produced in Step (A) in an inert gas atmosphere (Step (B)). It may include an additional step (Step (C)), subsequent to Step (B), for completely reducing nickel oxide in said fine particles by heating at temperature lower than that for Step (B) in a reducing gas atmosphere.

Abstract translation: 制造能够在低温下金属化粉末以防止其烧结的细镍粉的有效方法，以及由具有平坦形状，有限变化直径和均匀厚度的颗粒形成的由该方法生产的细镍粉，并且适用于 用于层压陶瓷电容器的高电容的内部电极。 该方法包括通过将明胶吸附到具有不同尺寸和形状的预形成的镍化合物颗粒上形成涂有明胶的镍化合物的步骤（步骤（A）），以及将用明胶涂布的镍化合物转化为含有金属镍的细颗粒的另一步骤 和氧化镍，通过在惰性气体气氛中加热在步骤（A）中制备的用明胶制备的镍化合物（步骤（B））。 在步骤（B）之后，还可以包括在还原气体气氛中通过在低于步骤（B）的温度下进行加热来完全还原所述细颗粒中的氧化镍的附加步骤（步骤（C））。

公开(公告)号：US5318797A

公开(公告)日：1994-06-07

申请号：US540930

申请日：1990-06-20

Applicant: Egon Matijevic ,  Nobuo Kawahashi

Inventor： Egon Matijevic ,  Nobuo Kawahashi

IPC: A61K47/02 ,  A61K8/00 ,  A61K8/11 ,  A61K8/26 ,  A61K9/50 ,  A61K47/34 ,  A61K49/00 ,  A61Q17/04 ,  B01J2/00 ,  B01J13/02 ,  B01J13/04 ,  B01J13/20 ,  C01B31/02 ,  C01B31/30 ,  C01F7/02 ,  C01F17/00 ,  C01G25/00 ,  C04B38/06 ,  C08J3/12 ,  C10M103/00 ,  H01F1/11 ,  B05D7/24

CPC classification number: B01J13/02

Abstract: Spherical particles include a core of a polymer and a metal compound covering the polymer core. These particles may be formed by homogeneously dispersing particles of a polymeric compound in an aqueous solution of a hydrolyzable metal salt to form a uniform metal layer around the spherical particles. The spherical particles can also include a core of carbon and a metal compound covering the carbon core or the particles can have a hollow core prepared by heating spherical polymer particles coated with a metal compound to a temperature of 150.degree. C. or higher in the presence of oxygen to completely decompose the polymeric compound. These spherical particles are useful in electronic materials, magnetic materials and the like.

Abstract translation: 球形颗粒包括聚合物芯和覆盖聚合物芯的金属化合物。 这些颗粒可以通过将高分子化合物的颗粒均匀分散在可水解金属盐的水溶液中形成，以在球形颗粒周围形成均匀的金属层。 球形颗粒还可以包括碳芯和覆盖碳芯的金属化合物，或者颗粒可以具有通过将存在金属化合物的球形聚合物颗粒加热至150℃或更高的温度而制备的中空芯 的氧气以完全分解聚合物。 这些球形颗粒可用于电子材料，磁性材料等。

公开(公告)号：US07604679B2

公开(公告)日：2009-10-20

申请号：US11266495

申请日：2005-11-04

Applicant: Yasumasa Hattori ,  Egon Matijevic

Inventor： Yasumasa Hattori ,  Egon Matijevic

IPC: B22F1/00 ,  B22F9/00 ,  C21B15/04 ,  C22B5/20 ,  C22C1/04 ,  B22F1/02 ,  C22C1/05

CPC classification number: B22F9/22 ,  B22F1/0018 ,  B22F2001/0033 ,  B22F2998/00 ,  B82Y30/00 ,  B22F1/0055 ,  B22F2201/013 ,  B22F2201/02

Abstract: An efficient process for producing fine nickel powder, capable of metallizing the powder at low temperature to prevent its sintering, and fine nickel powder produced by the process, composed of particles having a flat shape, diameter of limited variations and uniform thickness, and suitable for internal electrodes for laminate ceramic capacitors of high electric capacity. The process comprises a step for forming a nickel compound coated with gelatin by adsorbing gelatin on preformed nickel compound particles with different size and shape (Step (A)), and another step for converting said nickel compound coated with gelatin into fine particles containing metallic nickel and nickel oxide by heating the nickel compound coated with gelatin produced in Step (A) in an inert gas atmosphere (Step (B)). It may include an additional step (Step (C)), subsequent to Step (B), for completely reducing nickel oxide in said fine particles by heating at temperature lower than that for Step (B) in a reducing gas atmosphere.

Abstract translation: 制造能够在低温下金属化粉末以防止其烧结的细镍粉的有效方法，以及由具有平坦形状，有限变化直径和均匀厚度的颗粒形成的由该方法生产的细镍粉，并且适用于 用于层压陶瓷电容器的高电容的内部电极。 该方法包括通过将明胶吸附到具有不同尺寸和形状的预形成的镍化合物颗粒上形成涂有明胶的镍化合物的步骤（步骤（A）），以及将用明胶涂布的镍化合物转化为含有金属镍的细颗粒的另一步骤 和氧化镍，通过在惰性气体气氛中加热在步骤（A）中制备的用明胶制备的镍化合物（步骤（B））。 在步骤（B）之后，还可以包括在还原气体气氛中通过在低于步骤（B）的温度下进行加热来完全还原所述细颗粒中的氧化镍的附加步骤（步骤（C））。