摘要:
The invention relates to a method for separating ashes from the exhaust gases of combustion installations by means of separating devices. According to the invention, a hydrophobic, pyrogenically produced silicic acid is introduced into the flow of exhaust gas.
摘要:
SiO2—TiO2 glasses having a low coefficient of thermal expansion are produced by a molding being produced that consists of SiO2 powder, SiO2—TiO2 powder or TiO2 powder and that contains by way of secondary component a titanium-containing component which is converted into amorphous TiO2.
摘要:
Metal-containing, shaped, polymeric, tertiary and/or secondary organosiloxane amine compounds are introduced which contain the metals Pd, Pt, Ru, Rh individually or in combination as well as optional promotors and/or moderators. The organosiloxane amine functioning as carrier for the metals contains the units ##STR1## and/or units ##STR2## in which R.sup.1 to R.sup.5 are a group ##STR3## with R.sup.6 as a double-bonded group bound to N and Si (e.g. an alkylene group) and X is an amine group such as The carrier substance can be cross-linked with cross-linking agents containing Si, Ti, Zr or Al. The metal-containing product is spherical in form and is defined by the parameters of sphere diameter, specific surface and pore volume as well as bulk density. A method of production is disclosed which can be carried out in several variants as well as the use of the metal-containing product as catalyst for hydrogenation reactions and oxidation reactions.
摘要:
Apparatus for the catalytic conversion of waste gases such as those which accumulate in the synthesis of vinyl chloride is presented in which the waste gases are successively treated at an elevated temperature with a catalyst for oxidative cracking and with a catalyst for oxidative afterburning.
摘要:
Molded articles based on pyrogenically prepared aluminum oxide and having the following physical-chemical characteristic data:______________________________________ External diameter: 2 to 15 mm BET surface area: 60 to 115 m.sup.2 /g Total Pore volume: 0.30 to 0.80 ml/g Crushing strength: 100 to 300N Pore size distribution: no pores
摘要翻译:基于热解法制备的氧化铝并具有以下物理化学特性数据的成型制品:外径:2至15mm -BET表面积:60至115m2 / g - 总孔体积:0.30至0.80ml / g - 冲洗 强度:100〜300N - 孔径分布:直径不大于5nm的孔径, - 直径为10〜40nm范围的至少80%。 - 组合物:94〜99重量%的Al 2 O 3 - 剩余SiO 2。 - 它们是通过用高岭土和/或石墨,尿素,蜡,糖或淀粉加热水均匀化热解法制备的氧化铝来制备的,在80-120℃的温度下干燥该混合物,并将其粉碎形成 粉末,压制粉末以形成成型体,并通过在400℃至1200℃的温度下加热回火成型体0.5至6小时。 模制品可用作催化剂载体或催化剂。
摘要:
A method for the catalytic conversion of waste gases such as those which accumulate in the synthesis of vinyl chloride is presented in which the waste gases are successively treated at an elevated temperature with a catalyst for oxidative cracking and with a catalyst for oxidative afterburning. Apparatus for carrying out the method is also shown.
摘要:
A catalyst for the production of hydrocarbon consists essentially of crystalline aluminum silicate, at least one compound of the metal zinc and/or cadmium and additionally silica. The catalyst is produced by heating a crystalline aluminum silicate, in a given case partially or completely converted to the hydrogen form, with a zinc and/or cadmium compound and molding with a silica containing binder.
摘要:
Plasma-sprayed layers of aluminium oxide on a substrate are produced by using a pyrogenically produced aluminium oxide, for example selected from the group consisting of borosilicate and steel, as starting powder.
摘要:
Granules based on silicon dioxide and having the properties: Average grain size:10 to 120 μm BET surface area:40 to 400 m2/g Pore volume:0.5 to 2.5 ml/g Pore size distribution:less than 5% of the total pore volume exists of pores with a diameter
摘要:
Plasma-sprayed layers of aluminium oxide on a substrate are produced by using a pyrogenically produced aluminium oxide, for example selected from the group consisting of borosilicate and steel, as starting powder.