摘要:
The invention provides a nickel upon transition alumina catalyst containing 5-40% ww of nickel, with an active nickel surface area between 80 and 300 m²/g of Ni, with a transition alumina that satisfies the following X-ray diffraction pattern:
Preferably, the BET total surface area of the catalyst is between 50 and 200 m²/g catalyst and is substantially free from pores with a radius below 2.0 nm. Also, a process is provided for hydrotreating unsaturated hydrocarbons, in which unsaturated hydrocarbons are treated with hydrogen in the presence of a catalyst as defined above.
摘要:
Einen Eisenoxid-Katalysator mit einer BET-Oberfläche von 2 bis 8 m 2 /g kann man dadurch herstellen, dass man zunächst gasförmiges Eisenchlorid mit Sauerstoff oder sauerstoffhaltigen Gasen bei Temperaturen von 750 bis 1050 °C umsetzt. Nach gemeinsamer Abscheidung des gebildeten feinteiligen Eisenoxids und des nicht umgesetzten Eisenchlorids suspendiert man Eisenoxid und Eisenchlorid in Wasser. Aus der Suspension filtriert man das Eisenoxid ab und trocknet es bei Temperaturen von 200 bis 300 °C. Schliesslich zerkleinert man das getrocknete Eisenoxid.
摘要:
A SiO 2 comprising carrier is treated with a specified silicon compound and thereafter cobalt is emplaced on the carrier by contacting it with a cobalt compound in the presence of an organic liquid. The silicon compounds to be applied have the general formula Si(X) n (Y) m (Z) in which X = halogen, alkoxy or acylocy; Y = H or a hydrocarbyl group; Z = halogen or a nitrogen or oxygen containing group; n = 0-3; n+m = 3.
摘要:
A one-step process for purifying an inert gas comprises contacting the inert gas including minute quantities of an impurity selected from the group consisting of CO, CO₂, O₂, H₂, H₂O and mixtures thereof with a particulate material comprising nickel in an amount of at least about 5% by weight as elemental nickel distributed over an effective area of surface, typically from about l00 to 200 m²/g, thereby forming an inert gas having less than l ppm and preferably less than 0.l ppm of any such impurity.
摘要:
Catalyst precursor units, e.g. for ammonia synthesis catalysts, comprise an iron oxide composition in the form of sintered shaped units of substantially uniform cross section having a plurality, e.g. 13 to 50 or more, through passages of substantially uniform cross section. The passages preferably have a diameter of less than 1.5, particularly less than 0.7, mm.