Molded articles based on pyrogenically prepared silicon dioxide, process
for their production and their use
    5.
    发明授权
    Molded articles based on pyrogenically prepared silicon dioxide, process for their production and their use 失效
    基于热解制备的二氧化硅的成型制品,其生产和使用的过程

    公开(公告)号:US5021378A

    公开(公告)日:1991-06-04

    申请号:US488379

    申请日:1990-02-23

    摘要: Molded articles based on pyrogenically prepared silicon dioxide and having the following physical-chemical characteristic data:______________________________________ External diameter 2 to 15 mm BET surface area 50 to 400 m.sup.2 /g Total Pore volume 0.6 to 1.3 ml/g Crushing strength 40 to 120 N Pore size distribution no pores 95% by weight of SiO.sub.2 remainder Al.sub.2 O.sub.3. ______________________________________ These products are produced by compacting pyrogenically prepared silicon dioxide with kaolin and/or graphite, sugar, starch, urea or wax with addition of water, drying the mixture at a temperature of from 80.degree. to 120.degree. C. and comminuting it to form a powder, pressing the powder to form the desired article, and tempering the articles at a temperature of from 400.degree. to 1200.degree. C. for a period of 0.5 to 6 hours. The molded bodies can be used as a catalyst support or catalyst.

    摘要翻译: 基于热解法制备的二氧化硅的成型制品,具有以下物理化学特性数据:外径2〜15mm -BET表面积50〜400m2 / g - 总孔体积0.6〜1.3ml / g - 冲击强度40〜 120 N孔径分布孔径<5 nm直径,至少80%,直径范围5至40 nm - 组成> 95%(重量)SiO 2剩余部分Al2O3。 - 这些产品是通过用高岭土和/或石墨,糖,淀粉,尿素或蜡与加热水压制热解法制备的二氧化硅,在80-120℃的温度下干燥该混合物并粉碎形成的 粉末,按压粉末形成所需的物品,并在400℃〜1200℃的温度下回火制品0.5〜6小时。 成型体可以用作催化剂载体或催化剂。

    Molded articles based on pyrogenically produced mixed-oxide systems of
silicon dioxide and aluminum oxide, a method for manufacturing them and
their use
    6.
    发明授权
    Molded articles based on pyrogenically produced mixed-oxide systems of silicon dioxide and aluminum oxide, a method for manufacturing them and their use 失效
    基于热解产生的二氧化硅和氧化铝的混合氧化物体系的成型制品,其制造方法及其用途

    公开(公告)号:US5002918A

    公开(公告)日:1991-03-26

    申请号:US488382

    申请日:1990-02-23

    CPC分类号: B01J37/0009 B01J21/12

    摘要: A molded; i.e. pressed, article based on a pyrogenically produced system of mixed oxides of silicon dioxide and aluminum oxide and having the following physical-chemical features:______________________________________ pellet diameters 2 to 15 mm BET surface area according to 90 to 200 m.sup.2 /g DIN 66131 pore volume 0.6 to 1.3 ml/g pore size distribution no pores with 75% by weight of SiO.sub.2, remainder Al.sub.2 O.sub.3 ______________________________________ These molded articles are manufactured by homogenizing a pyrogenically produced system of mixed oxides of silicon dioxide and aluminum oxide with graphite and/or kaolin, urea, sugar, starch, glaze frit powder and/or microcrystalline wax while water is being added, by drying the mixture at a temperature between 80.degree. and 120.degree. C. and then comminuting it into a powder that next is pressed into molded articles and then is annealed for 0.5 to 6 h at a temperature between 400.degree. and 1050.degree. C. The molded articles are used as catalyst-supporters or as catalysts.

    摘要翻译: 成型; 即基于由二氧化硅和氧化铝的混合氧化物产生的热解产生体系的物品,具有以下物理化学特征: - 直径2至15mm -BET表面积,根据90至200m 2 / g -DIN 66131 - 孔体积0.6至1.3ml / g - 孔径分布无5- 5nm直径的孔,至少75%的孔在5至40nm的范围内 - 冲击强度30至120N-组成> 75 SiO 2重量%,余量为Al 2 O 3。这些模塑制品通过将石英和/或高岭土,尿素,糖,淀粉,釉料粉末和/或微晶的二氧化硅和氧化铝的混合氧化物的热解产生体系均质化 通过在80〜120℃的温度下干燥混合物,然后将其粉碎成粉末,然后将其压制成模制品,然后在400℃的温度下退火0.5至6小时,同时加入水 DEG和1050℃ 颗粒用作催化剂载体或催化剂。

    Shaped articles based on pyrogenically produced titanium dioxide
    9.
    发明授权
    Shaped articles based on pyrogenically produced titanium dioxide 失效
    基于热解产生的二氧化钛的成型制品

    公开(公告)号:US5366938A

    公开(公告)日:1994-11-22

    申请号:US508564

    申请日:1990-04-13

    摘要: Pressed parts based on pyrogenically produced titanium dioxide with the following physico-chemical characteristics:______________________________________ Outer diameter 0.8-15 mm BET surface according 99.5% TiO.sub.2 ______________________________________ They are produced by mixing pyrogenically produced titanium dioxide with urea, graphite and water, compacting the mixture, optionally drying the resulting mass at 80.degree. C. to 120.degree. C. comminuting, subsequently extruding or tabletting to produce pressed parts and tempering the pressed parts at a temperature of 710.degree. C. to 1000.degree. C. for a period of 0.5 to 6 hours. The pressed parts can be used as catalyst or catalytic carrier.

    摘要翻译: 基于热解产生的二氧化钛的压制零件,具有以下物理化学特性:-Out直径0.8-15mm -BET表面,根据<1-20m2 / g-至DIN 66131-孔体积0.01-0.29cm 3 / g - 孔 分布无孔<10nm - 至少90%的孔 - 在10-80nm的范围内 - 增强强度30-500N /压制部分-TiO 2相金红石100% - 复合> 99.5%TiO 2 - 它们由 将热解产生的二氧化钛与尿素,石墨和水混合,将混合物压实,任选地将所得物质在80℃至120℃干燥,粉碎,随后挤出或压片以产生压制部件,并在 710℃至1000℃,时间为0.5至6小时。 压制零件可用作催化剂或催化载体。