Abstract:
Carbon monoxide is removed from material streams by adsorption to an adsorption composition containing oxides of copper, zinc and zirconium, the copper-containing fraction of which has a degree of reduction, expressed as weight ratio of metallic copper to the sum of metallic copper and copper oxides, calculated as CuO, of at least 90%, and at most 97%.
Abstract:
The invention relates to a method for oxidizing ammonia, which is characterized in that three-dimensional bodies that are coated with catalytically active materials and are made of high-temperature stable material containing a Fe-Cr-Al alloy are used as a catalyst. Also disclosed are said catalyst that is suitable for the inventive method as well as a method and a corresponding apparatus for producing nitric acid.
Abstract:
Chromium-free catalyst for the low-temperature conversion of carbon monoxide and water into hydrogen and carbon dioxide, which comprises a mixed oxide of at least copper oxide, zinc oxide and aluminium oxide, with the catalyst precursor being present essentially as hydrotalcite and the content of copper oxide being not more than 20% by weight.
Abstract:
According to the invention, carbon monoxide is eliminated from streams of substances by adsorption on an adsorption mass that contains copper oxide and zircon oxide, but no zinc oxide. Said adsorption mass is characterised in that it contains between 70 and 99.8 % by weight of copper oxide and between 0.2 and 30 % by weight of zinc oxide, in relation to the total amount of adsorption mass.
Abstract:
Carbon monoxide is removed from material streams by adsorption to an adsorption composition containing oxides of copper, zinc and zirconium, the copper-containing fraction of which has a degree of reduction, expressed as weight ratio of metallic copper to the sum of metallic copper and copper oxides, calculated as CuO, of at least 45%, and at most 75%.
Abstract:
Chromium-free catalyst for the low-temperature conversion of carbon monox ide and water into hydrogen and carbon dioxide, which comprises a mixed oxid e of at least copper oxide, zinc oxide and aluminium oxide, with the catalys t precursor being present essentially as hydrotalcite and the content of cop per oxide being not more than 20% by weight.
Abstract:
The present invention relates to a process for preparing polytetrahydrofuran or tetrahydrofuran copolymers by polymerization of tetrahydrofuran in the presence of a telogen and/or a comonomer over a fixed bed of an acid catalyst, in which the temperature of the polymerization mixture increases in the direction of flow through the catalyst bed.
Abstract:
A linear aliphatic ether is present at 0.001-5 wt.% in the reaction mixture when polytetrahydrofuran or a tetrahydrofuran (THF) copolymer is produced by polymerization of THF with an acid catalyst in presence of a telogen and/or a comonomer.
Abstract:
The present invention relates to porous metal organic frameworks comprising at least one at least bidentate organic compound L coordinated to at least one metal ion M, wherein L has at least one functional group G which bonds noncoordinatively to M and is selected from the group consisting of —SO3H and —PO3H2 and their analogues. The invention further provides processes for their preparation and also their use.