Molded articles based on pyrogenically produced mixed-oxide systems of
silicon dioxide and aluminum oxide, a method for manufacturing them and
their use
    12.
    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。

    Molded articles based on pyrogenically produced titanium dioxide method
for their manufacturing and uses
    18.
    发明授权
    Molded articles based on pyrogenically produced titanium dioxide method for their manufacturing and uses 失效
    基于热解产生的二氧化钛方法的成型制品用于其制造和使用

    公开(公告)号:US5002917A

    公开(公告)日:1991-03-26

    申请号:US488384

    申请日:1990-02-23

    摘要: The invention concerns pressed pellets based on pyrogenically produced titanium dioxide having the following properties:______________________________________ outside diameter 2 to 15 mm area according to BET surface 35 to 65 m.sup.2 /g DIN 66 131 Total pore volume 0.3 to 0.8 m.sup.3 /g crushing strength 40 to 300 N pore size distribution no pores 50% by weight of anatase) remainder SiO.sub.2 and Al.sub.2 O.sub.3. ______________________________________ They are made by mixing pyrogenically produced titanium with a foaming agent such as urea and with water, where called binder such as kaolin and also with a binder such as kaolin and also with a pelletizing accessory such as wax and by compacting the material which then is dried at a temperature of 80.degree. to 120.degree. C. and is comminuted into a powder which then is pressed by known means and the pressed articles are annealed for 0.5 to 4.5 h at a temperature of 400.degree. to 600.degree. C. The pressed articles are used as catalyst-carriers or as catalysts.

    摘要翻译: 本发明涉及基于热解法生产的具有以下特性的二氧化钛的压丸:根据BET表面35至65m2 / g-DIN 66 131的外径2至15mm - 总孔体积0.3至0.8m 3 / g - 抗压强度40至300N孔径分布无孔径<10nm直径,至少80%的孔径在10至70nm范围内 - 直径 - 至少94重量%的TiO 2( 主要是 - 即 - 锐钛矿的重量百分比> 50%)余量为SiO 2和Al 2 O 3。 - 它们通过将热解产生的钛与发泡剂如尿素和水(称为粘合剂如高岭土)以及还与粘合剂如高岭土混合并且还与造粒配件如蜡混合并通过压实然后将材料 在80〜120℃的温度下干燥,粉碎成粉末,然后用已知方法压制,压制品在400〜600℃的温度下退火0.5〜4.5小时。压制 制品用作催化剂载体或催化剂。