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    • 3. 发明授权
    • Synthetic mixed-layer silicate and method for the preparation thereof
    • 合成混合层状硅酸盐及其制备方法
    • US5595716A
    • 1997-01-21
    • US516533
    • 1995-08-18
    • Kazuo ToriiTakashi IwasakiYoshio Onodera
    • Kazuo ToriiTakashi IwasakiYoshio Onodera
    • C01B33/38B01J21/16C01B33/40
    • C01B33/40B01J21/16
    • A novel synthetic mixed-layer silicate consisting of the layers of serpentine and layers of saponite each having a specified chemical composition is proposed, which has excellent dispersibility in water to form a colloidal dispersion capable of being converted into a gel by standing to be useful as a gelating agent exhibiting thixotropy along with unique porosity characteristics which enable the use thereof as an adsorbent. The mixed-layer silicate is prepared by the process comprising the steps of: (a) preparing an acidic aqueous solution containing silicic acid, magnesium salt and aluminum salt; (b) alkalifying the solution by the addition of an alkaline compound to precipitate a hydrous composite oxide containing silicon, magnesium and aluminum; (c) collecting the precipitates of the hydrous composite oxide; (d) admixing the precipitates of the hydrous composite oxide with an aqueous solution of an alkali metal hydroxide to give an aqueous slurry; and (e) subjecting the aqueous slurry of the hydrous composite oxide to a hydrothermal treatment by heating at a temperature up to 500.degree. C.
    • 提出了由蛇纹石层和皂石层组成的新型合成混合层状硅酸盐,它们都具有特定的化学成分,其在水中具有优异的分散性,从而形成能够通过静置转化为凝胶的胶体分散体,以用作 具有触变性以及独特的孔隙特性的凝胶剂,其能够用作吸附剂。 混合层硅酸盐通过包括以下步骤的方法制备:(a)制备含有硅酸,镁盐和铝盐的酸性水溶液; (b)通过加入碱性化合物使溶液碱化以沉淀含硅,镁和铝的含水复合氧化物; (c)收集含水复合氧化物的析出物; (d)将含水复合氧化物的沉淀物与碱金属氢氧化物的水溶液混合,得到含水浆液; 和(e)在高达500℃的温度下加热水合复合氧化物的水性浆料进行水热处理。
    • 4. 发明授权
    • Synthetic inorganic porous material and method for the preparation
thereof
    • 合成无机多孔材料及其制备方法
    • US5559070A
    • 1996-09-24
    • US319573
    • 1994-10-07
    • Kazuo ToriiTakashi IwasakiYoshio OnoderaHiromichi Hayashi
    • Kazuo ToriiTakashi IwasakiYoshio OnoderaHiromichi Hayashi
    • B01J20/18B01J20/10B01J21/10B01J23/00B01J23/755C01B33/20G03G15/01G06T1/00G06T5/00H04N1/409H04N1/46H04N1/60B01J21/08
    • B01J23/755B01J21/10B01J23/002B01J2523/00
    • Proposed is a novel synthetic inorganic porous material having a chemical composition of the general formula[(SiO.sub.2).sub.8 .multidot.(MO.sub.2/3).sub.a .multidot.(OH).sub.2/3a+b ].sup.b- .multidot.b/c(A.sup.c+),in which M is an ion of a divalent metal, e.g., Mg, A is a cation of an alkali metal, alkaline earth metal, hydrogen or ammonium, the subscript a is a positive number of 3 to 10, b is a positive number of 0.1 to 1 and c is a positive number of 1 to 2, and characterized by a specific surface area of 100 to 800 m.sup.2 /g, average pore diameter of 2 to 8 nm, pore volume of 0.1 to 0.8 cm.sup.3 /g and cation exchange capacity of 0.1 to 1.2 meq/g. This porous material is prepared by a method comprising the steps of: (a) mixing an aqueous solution of sodium silicate and an aqueous solution of a water-soluble salt of a divalent metal M, e.g., magnesium, to form hydrous oxides; (b) separating the hydrous oxides from the precipitation medium; (c) subjecting an aqueous slurry of the hydrous oxides to a hydrothermal reaction at a temperature of from 100.degree. to 300.degree. C.; and (d) drying and heating the hydrothermally obtained product at a temperature of from 100.degree. to 1000.degree. C. to effect dehydration.
    • 提出了具有通式[(SiO 2)8x(MO + E,fra 2/3 + EE)ax(OH)+ E,fra 2/3 + EE a + b]的化学组成的新型合成无机多孔材料。 b-xb / c(Ac +),其中M为二价金属的离子,例如Mg,A为碱金属,碱土金属,氢或铵的阳离子,下标a为正数3 至10,b为0.1〜1的正数,c为1〜2的正数,特征在于比表面积为100〜800m 2 / g,平均孔径为2〜8nm,孔体积为 0.1〜0.8cm 3 / g,阳离子交换容量为0.1〜1.2meq / g。 这种多孔材料是通过包括以下步骤的方法制备的:(a)将硅酸钠水溶液与二价金属M例如镁的水溶性盐的水溶液混合以形成水合氧化物; (b)从沉淀介质中分离含水氧化物; (c)使水合氧化物的水性浆料在100℃至300℃的温度下进行水热反应; 和(d)在100℃至1000℃的温度下干燥并加热水热制得的产物以进行脱水。
    • 10. 发明授权
    • Piston ring
    • 活塞环
    • US5405154A
    • 1995-04-11
    • US893847
    • 1992-06-04
    • Takeshi TsuchiyaShuji SameshimaYoshio OnoderaSatoshi Kawashima
    • Takeshi TsuchiyaShuji SameshimaYoshio OnoderaSatoshi Kawashima
    • C23C8/26B23P15/06F16J9/26F16J9/00
    • B23P15/06F16J9/26Y10T29/49281Y10T29/49282
    • A compression ring as a piston ring adapted to by received in an annular groove formed in a piston disposed in a cylinder assembly of an internal combustion engine includes an annular ring base member having a cutout portion, the ring base member having an outer sliding surface, upper and lower surfaces continuous to the sliding surface through corner portions and an inner peripheral surface to be fitted to the piston groove, the sliding surface contacting an inner wall of the cylinder when the piston reciprocates therein. A nitriding layer is formed on all the surfaces of the ring base member by a nitriding treatment. A white portion of the nitriding layer formed only on the sliding surface of the ring base member is substantially completely removed and white portions of the nitriding layer formed on the first and second surfaces and corner portions between the sliding surface and the upper and lower surfaces are removed so as to reduce thicknesses thereof to not more than 5 .mu.m.
    • 作为活塞环的压缩环,适于通过容纳在形成在内燃机的气缸组件中的活塞中的环形槽中,包括具有切口部的环形基座构件,所述环形基座构件具有外部滑动面, 通过角部与滑动面连续的上表面和下表面以及与活塞槽配合的内周面,当活塞在其中往复运动时,滑动面与气缸的内壁接触。 通过氮化处理在环状基材的全部表面上形成氮化层。 基本上完全除去仅在环状基材的滑动面上形成的氮化层的白色部分,形成在滑动面与上下面之间的第一和第二表面和角部的氮化层的白色部分是 去除以便将其厚度减小到不超过5μm。