Thermally stable quartz glass
    1.
    发明授权
    Thermally stable quartz glass 失效
    耐热稳定的石英玻璃

    公开(公告)号:US4180409A

    公开(公告)日:1979-12-25

    申请号:US887683

    申请日:1978-03-16

    申请人: Manfred Mansmann

    发明人: Manfred Mansmann

    摘要: Quartz glass of high thermal stability is produced from a SiO.sub.2 solution or sol which is substantially free of alkali and alkaline earth metal oxides and contains chromium and/or manganese in about 0.05 to 20% by weight of the SiO.sub.2 expressed as Cr.sub.2 O.sub.3 and Mn.sub.2 O.sub.3. The quartz glass upon heating above 1100.degree. C. forms cristobalite having an average crystallite size of about 100 to 500 A. Articles therefrom retain their physical and mechanical properties at high temperatures. The materials are suited for producing fibers by the usual methods of spinning from solutions or sols and, as such, or as fibers they are suited for use in reinforcement and insulation and in making flameproof textiles.

    摘要翻译: 具有高热稳定性的石英玻璃由基本上不含碱金属和碱土金属氧化物的SiO 2溶液或溶胶制成,并且含有以Cr2O3和Mn2O3表示的约0.05至20重量%的铬和/或锰。 在1100℃以上加热的石英玻璃形成平均微晶尺寸为约100-500埃的方英石。其制品在高温下保持其物理和机械性能。 这些材料适用于通过从溶液或溶胶中旋转的通常方法,或者作为适合用于加强和绝缘以及制造防火织物的纤维来生产纤维。

    Production of improved chromium oxide green pigment
    2.
    发明授权
    Production of improved chromium oxide green pigment 失效
    生产改性氧化铬绿色颜料

    公开(公告)号:US4067747A

    公开(公告)日:1978-01-10

    申请号:US656035

    申请日:1976-02-06

    IPC分类号: C01G37/033 C09C1/00 C09C1/34

    CPC分类号: C09C1/346 C01P2006/60

    摘要: A process for the production of chromium oxide green pigment comprising heating a mixture of ammonium dichromate with at least the stoichiometrically equivalent quantity of a sodium salt selected from the group consisting of chloride and sulfate over a period of at most about 15 minutes to a pigment-forming temperature of about 800 to 1100.degree. C in the presence of about 1 to 45% water based on the weight of the mixture, calcining the mixture at a temperature in the above-mentioned range, and separating the formed pigment from the salts. The mixture may be formed in situ by reaction of sodium dichromate with ammonium chloride or sulfate in the presence of water. The presence during calcining of organic modifiers such as sawdust or of boron compounds such as borax increases, tinting strength and disproportionately affect color. The pigments are brighter, and of higher tinting strength than heretofore produced.

    摘要翻译: 一种生产氧化铬绿色颜料的方法,其包括将至少在化学计量上等效量的选自氯化物和硫酸盐的钠盐的混合物与至少约15分钟的时间内加入重铬酸铵的混合物, 基于混合物的重量,在约1〜45%的水的存在下,在约800〜1100℃的温度下,在上述范围的温度下煅烧混合物,并将形成的颜料与盐分离。 混合物可以在水存在下通过使重铬酸钠与氯化铵或硫酸钠反应而原位形成。 有机改性剂如木屑或硼化合物如硼砂在煅烧过程中的存在增加,着色强度和不成比例地影响颜色。 颜料比以前生产的颜色更亮,颜色更强。

    Production of inorganic fibers
    4.
    发明授权
    Production of inorganic fibers 失效
    生产无机纤维

    公开(公告)号:US4010233A

    公开(公告)日:1977-03-01

    申请号:US424229

    申请日:1973-12-12

    摘要: The invention relates to the production of inorganic fibers comprising a metal oxide phase and a finely divided disperse phase distributed throughout the oxide phase, the disperse phase constituting about 0.5 to 50% by weight of the fiber. The process involves preferably dry spinning a solution in water or an organic solvent of fiber forming components which, when heated to temperature of from 500.degree. to 1600.degree. C either in an inert or in a reactive atmosphere, form at least two phases with a miscibility gap, of which one phase is an oxide phase containing the other phase in very finely disperse form. Preferably, the solution contains a metal salt, the anion of which contains carbon so that upon heating there is formed an oxide phase comprising the oxide of said metal having carbon dispersed therein; if carbon is not in the anion, its precursor may be an organic compound, such as a polymer, present in the solution. Other materials which may constitute the disperse phase include boron as well as carbides, nitrides, borides or silicides and some metals. The resulting fiber are of low porosity and high modulus and impart superior properties to plastics, metals, glasses and ceramics reinforced therewith.

    摘要翻译: 本发明涉及包含分布在整个氧化物相中的金属氧化物相和细分散分散相的无机纤维的生产,分散相占纤维的约0.5-50重量%。 该方法优选将水溶液或纤维形成组分的有机溶剂干燥纺丝,当在惰性或反应性气氛中加热至500℃至1600℃的温度时,形成至少两相具有混溶性 间隙,其中一相是以非常细的分散形式含有另一相的氧化物相。 优选地,溶液含有金属盐,其阴离子含有碳,使得在加热时形成包含其中分散有碳的所述金属的氧化物的氧化物相; 如果碳不在阴离子中,其前体可以是存在于溶液中的有机化合物,如聚合物。 可能构成分散相的其他材料包括硼以及碳化物,氮化物,硼化物或硅化物以及一些金属。 所得到的纤维具有低孔隙率和高模量,并赋予其对其进行增强的塑料,金属,玻璃和陶瓷优异的性能。

    Processing of aluminum oxide fibers
    5.
    发明授权
    Processing of aluminum oxide fibers 失效
    氧化铝纤维的加工

    公开(公告)号:US3947534A

    公开(公告)日:1976-03-30

    申请号:US465952

    申请日:1974-05-01

    申请人: Manfred Mansmann

    发明人: Manfred Mansmann

    摘要: In the production of aluminum oxide fibers comprising dry spinning an aluminum-containing solution to produce fiber and thereafter heat treating the fiber, the improvement which comprises applying to the fiber prior to heat treatment a solution of polyvinyl acetate in a solvent which is inert to the fiber. Advantageously the polyvinyl acetate is present in its solution in a concentration of about 0.1 to 10% by weight and is applied to the fiber in about 0.1 to 3 % by weight. The spinning solution may also contain SiO.sub.2 and polyethylene oxide, and the polyvinyl acetate solution may also contain di-n-butyl phthalate as a plasticizer for the polyvinyl acetate. The fiber bundles are characterized by increased strength and resistance to breaking during further processing.

    摘要翻译: 在生产含氧化铝纤维的氧化铝纤维中,包括含铝溶液以生产纤维,然后对纤维进行热处理,其改进在于,在将聚乙酸乙烯酯溶液在惰性的溶剂中加热处理之前, 纤维。 有利地,聚乙酸乙烯酯在其溶液中以约0.1至10重量%的浓度存在,并以约0.1至3重量%的量施用于纤维。 纺丝溶液也可以含有SiO 2和聚环氧乙烷,聚乙酸乙烯酯溶液也可以含有邻苯二甲酸二正丁酯作为聚乙酸乙烯酯的增塑剂。 纤维束的特征在于在进一步加工期间增加的强度和抗断裂性。

    Process for the preparation of zeolite A from kaolin
    7.
    发明授权
    Process for the preparation of zeolite A from kaolin 失效
    从高岭土制备沸石A的方法

    公开(公告)号:US4271130A

    公开(公告)日:1981-06-02

    申请号:US095750

    申请日:1979-11-19

    摘要: The invention provides a process for the production of zeolite A from kaolin by conversion of the kaolin into meta-kaolin followed by reaction of the meta-kaolin in an aqueous alkaline medium, wherein the conversion of the kaolin into the meta-kaolin is conducted at temperatures of between 700.degree. and 950.degree. C. in the presence of alkaline earth compounds and optionally in the presence of uncolored halides and/or halogens, wherein the process may be conducted under reducing conditions and in the presence of alkali metal compounds.

    摘要翻译: 本发明提供了一种从高岭土生产沸石A的方法,该方法是通过将高岭土转化为高高岭土,随后在含水碱性介质中使高岭土反应,其中高岭土转化为偏高岭土是在 在碱土金属化合物的存在下,任选地在未着色的卤化物和/或卤素的存在下,温度在700-950℃之间,其中该方法可以在还原条件下和在碱金属化合物的存在下进行。

    Thermally stable quartz glass
    9.
    发明授权
    Thermally stable quartz glass 失效
    耐热稳定的石英玻璃

    公开(公告)号:US4104045A

    公开(公告)日:1978-08-01

    申请号:US702835

    申请日:1976-07-06

    申请人: Manfred Mansmann

    发明人: Manfred Mansmann

    摘要: Quartz glass of high thermal stability is produced from a SiO.sub.2 solution or sol which is substantially free of alkali and alkaline earth metal oxides and contains chromium and/or manganese in about 0.05 to 20% by weight of the SiO.sub.2 expressed as Cr.sub.2 O.sub.3 and Mn.sub.2 O.sub.3. The quartz glass upon heating above 1100.degree. C forms cristobalite having an average crystallite size of about 100 to 500 A. Articles therefrom retain their physical and mechanical properties at high temperatures. The materials are suited for producing fibers by the usual methods of spinning from solutions or sols and, as such, or as fibers they are suited for use in reinforcement and insulation and in making flameproof textiles.

    摘要翻译: 具有高热稳定性的石英玻璃由基本上不含碱金属和碱土金属氧化物的SiO 2溶液或溶胶制成,并且含有以Cr2O3和Mn2O3表示的约0.05至20重量%的铬和/或锰。 在1100℃以上加热的石英玻璃形成平均微晶尺寸为约100至500的方石石。其制品在高温下保持其物理和机械性能。 这些材料适用于通过从溶液或溶胶中旋转的通常方法,或者作为适合用于加强和绝缘以及制造防火织物的纤维来生产纤维。

    Production of low-sulfur chromium (III) oxide pigment
    10.
    发明授权
    Production of low-sulfur chromium (III) oxide pigment 失效
    生产低硫酸(III)氧化物颜料

    公开(公告)号:US4052225A

    公开(公告)日:1977-10-04

    申请号:US718296

    申请日:1976-08-27

    IPC分类号: C01G37/02 C09C1/34

    摘要: In the continuous production of low-sulfur chromium(III)oxide pigment comprising the steps of reducing a finely divided alkali metal chromate in a heated hydrogen-containing reaction zone at a temperature of about 900.degree. to 1600.degree. C, and precipitating the resulting chromium(III)oxide in the form of an aqueous dispersion, the improvement which comprises passing the reduction products from the reaction zone to a dwell zone and generating heat within said dwell zone to maintain the temperature therein in the range of about 900.degree. to 1600.degree. C. Preferably the dwell zone temperature is within 200.degree. C of that in the reaction zone and is maintained by introducing excess hydrogen into the reaction zone and consuming it in the dwell zone by introduction of oxygen. The resulting pigments exhibit a fuller green color.