摘要:
Iron- and manganese-comprising heterogeneous catalyst and process for producing it, which comprises the following steps: I. thermal decomposition of gaseous iron pentacarbonyl to give carbonyl iron powder having spherical primary particles, II. treatment of carbonyl iron powder obtained in step I with hydrogen, resulting in the metallic spherical primary particles at least partly agglomerating, III. surface oxidation of the iron particles from step II (i.e. agglomerates=secondary particles, and also any primary particles still present) to form iron oxide, IV. contacting of the particles from step III with an aqueous solution of a manganese compound, V. drying in the presence of oxygen and subsequent calcination in the absence of oxygen, resulting firstly in oxygen-comprising manganese compounds on the particles and finally reaction of these with the iron oxide to form a mixed oxide of the formula MnxFe3-xO4, where 0
摘要翻译:含铁和锰的非均相催化剂及其制备方法,其包括以下步骤:I.气态铁五羰基热分解,得到具有球形初级颗粒的羰基铁粉,II。 用氢气处理在步骤I中获得的羰基铁粉末,导致金属球形初级颗粒至少部分凝聚,III。 来自步骤II的铁颗粒的表面氧化(即附聚物=二次颗粒,以及仍然存在的任何初级颗粒)以形成氧化铁。 将来自步骤III的颗粒与锰化合物的水溶液接触,V在氧气存在下干燥,随后在不存在氧气下进行煅烧,首先在颗粒上含氧的锰化合物,最后将它们与 形成式Mn x Fe 3-x O 4的混合氧化物,其中0
摘要:
Iron- and copper-comprising heterogeneous catalyst and process for producing it, which comprises the following steps: I. thermal decomposition of gaseous iron pentacarbonyl to give carbonyl iron powder having spherical primary particles, II. treatment of carbonyl iron powder obtained in step I with hydrogen, resulting in the metallic spherical primary particles at least partly agglomerating, III. surface oxidation of the iron particles from step II (agglomerates=secondary particles, and also any primary particles still present) to form iron oxide, IV. contacting of the particles from step III with an aqueous solution of a copper compound, V. drying in the presence of oxygen and subsequent calcination in the absence of oxygen, resulting firstly in oxygen-comprising copper compounds on the particles and finally reaction of these with the iron oxide to form a mixed oxide of the formula CuxFe3-xO4, where 0
摘要翻译:含铁和铜的非均相催化剂及其制备方法,其包括以下步骤:I.气态铁五羰基热分解,得到具有球形初级颗粒的羰基铁粉,II。 用氢气处理在步骤I中获得的羰基铁粉末,导致金属球形初级颗粒至少部分凝聚,III。 来自步骤II的铁颗粒的表面氧化(附聚物=二次颗粒,以及仍然存在的任何初级颗粒)以形成氧化铁。 将来自步骤III的颗粒与铜化合物的水溶液接触,V.在氧气存在下干燥,随后在不存在氧气的情况下煅烧,首先在颗粒上含氧的铜化合物,最后将它们与 所述氧化铁形成式CuxFe 3-x O 4的混合氧化物,其中0
摘要:
Iron- and manganese-containing heterogeneous catalyst, and a process for producing it, including the following steps: thermal decomposition of gaseous iron pentacarbonyl to give carbonyl iron powder having spherical primary particles; treatment of carbonyl iron powder with hydrogen, resulting in the metallic spherical primary particles at least partly agglomerating; surface oxidation of the iron particles to form iron oxide; contacting the particles with an aqueous solution of a manganese compound; drying in the presence of oxygen and subsequent calcination in the absence of oxygen, resulting in oxygen-comprising manganese compounds on the particles; and finally reaction of these with the iron oxide to form a mixed oxide of the formula MnxFe3-xO4, where 0
摘要翻译:含铁和锰的非均相催化剂及其制备方法,包括以下步骤:五羰基气态铁的热分解,得到具有球形一次颗粒的羰基铁粉; 用氢气处理羰基铁粉末,导致金属球形初级颗粒至少部分凝聚; 铁颗粒的表面氧化形成氧化铁; 使所述颗粒与锰化合物的水溶液接触; 在氧气存在下干燥,随后在不存在氧气下进行煅烧,在颗粒上产生含氧的锰化合物; 最后使其与氧化铁反应形成式Mn x Fe 3-x O 4的混合氧化物,其中0
摘要:
Iron- and copper-containing heterogeneous catalyst, and a process for producing it, including the following steps: thermal decomposition of gaseous iron pentacarbonyl to give carbonyl iron powder having spherical primary particles; treatment of carbonyl iron powder with hydrogen, resulting in the metallic spherical primary particles at least partly agglomerating; surface oxidation of the iron particles to form iron oxide; contacting the particles with an aqueous solution of a copper compound; drying in the presence of oxygen and subsequent calcination in the absence of oxygen, resulting in oxygen-comprising copper compounds on the particles; and finally reaction of these with the iron oxide to form a mixed oxide of the formula CuxFe3-xO4, where 0
摘要:
A combination instrument has a disk that is transparent for light in the visible range and that has a dial region and an indicator region. It further has a dial imprint, which is applied to the back of the transparent disk in the dial region. In addition, a polarizing filter disk is provided, which is disposed on the back of the transparent disk aligned with the indicator region and comprises a circular polarizing filter. An optical indicator unit is provided, which is disposed in alignment with the indicator region on the back of the transparent disk and the polarizing filter disk.
摘要:
A combination instrument has a disk that is transparent for light in the visible range and that has a dial region and an indicator region. It further has a dial imprint, which is applied to the back of the transparent disk in the dial region. In addition, a polarizing filter disk is provided, which is disposed on the back of the transparent disk aligned with the indicator region and comprises a circular polarizing filter. An optical indicator unit is provided, which is disposed in alignment with the indicator region on the back of the transparent disk and the polarizing filter disk.
摘要:
A vehicle door, comprising an inner door panel and an outer door panel with an inner surface facing the inner door panel, is provided. A loudspeaker which is arranged on the inner door panel, is spaced apart from the outer door panel and is intended for generating acoustic sound waves. A sound-guiding element which is designed to deflect sound waves radiated in the direction of the outer door panel by the loudspeaker and to guide said sound waves into a wet chamber of the vehicle door, which wet chamber is formed between the inner door panel and the outer door panel, and/or into a dry chamber of the vehicle door, which dry chamber is formed on a side of the inner door panel that faces away from the outer door panel.
摘要:
A connection between two annular sections of two components of an exhaust system of an internal combustion engine that is installed in a motor vehicle. In an embodiment, the two components are coaxial to one another. The connection comprises an annular connecting element with a first ring section, and a second ring section concentric to the first ring section. The ring sections are axially connected to one another in a rigid fashion on the face side by means of a connecting region. The first ring section is rigidly connected to the annular section of the first component by means of a first connecting region spaced apart from the connecting region. The second ring section is rigidly connected to the annular section of the second component by means of a second connecting region spaced apart from the connecting region. The connection is characterized by a high fatigue strength under thermal stress.
摘要:
An implantable fixation structure includes at least one implantable holding element. The holding element is connected to an implantable cochlear implant element and maintains the cochlear implant element in a desired position relative to the middle ear of a patient user.
摘要:
A door module of a vehicle door is provided. The door module comprising a carrier plate, a drive unit arranged on the carrier plate for driving a power-operated adjustment device of the door module, and a decoupling means arranged on the carrier plate for attenuating an acoustic excitation of the carrier plate in operation of the drive unit. The decoupling means is formed by at least one slot, which partly separates a portion carrying the drive unit from another portion of the carrier plate and extends around the drive unit or around a fastening point of the drive unit on the carrier plate in a circumferential direction, and at least one web, which connects the portion carrying the drive unit with the other portion of the carrier plate.