Abstract:
The invention relates to a shell catalyst containing ruthenium as an active metal, alone or together with at least one other metal of the auxiliary group IB, VIIB or VIII of the periodical system of the elements (CAS version), and applied to a carrier containing silicon dioxide as a carrier material. The invention also relates to a method for producing said shell catalyst, and to a method for hydrogenating an organic compound containing hydrogenable groups, preferably for hydrogenating a carbocyclic aromatic group to form the corresponding carbocyclic aliphatic groups or for hydrogenating aldehydes to form the corresponding alcohols, using the inventive shell catalyst. The invention further relates to the use of the inventive shell catalyst for hydrogenating an organic compound containing hydrogenable groups, preferably for hydrogenating a carbocyclic aromatic group to form the corresponding carbocyclic aliphatic groups or for hydrogenating aldehydes to form the corresponding alcohols.
Abstract:
The invention relates to a method for converting aromatic nitro compounds into the corresponding amines in the presence of hydrogenation catalysts. Said method is characterized in that hydrogenation catalysts are used in which nickel and platinum are provided on a carrier in the form of an alloy, the atomic ratio between nickel and platinum in said alloy ranging between 30:70 and 70:30.
Abstract:
A process for aminating hydrocarbons with ammonia in the presence of catalyst (i) which catalyzes the amination, characterized in that oxidizing agent is supplied to the reaction mixture and the oxidizing agent is reacted with hydrogen which is formed in the amination in the presence of a catalyst (H) which catalyzes this reaction with hydrogen.
Abstract:
The invention relates to a method for producing aromatic amines by catalytically hydrogenating the corresponding nitro compounds, in particular, for producing toluylene diamine by hydrogenating dinitrotoluene. The invention is characterised in that hydrogenation catalysts are used in which a mixture of platinum, nickel and an additional metal are provided as active components.
Abstract:
The present invention relates to a process for reacting an aromatic hydrocarbon containing aromatic sulphur compounds, or a mixture of aromatic hydrocarbons containing aromatic sulphur compounds, where appropriate in the presence of hydrogen, comprising a first step of removing aromatic sulphur compounds (step a) and a second step of hydrogenating an aromatic hydrocarbon or mixture of aromatic hydrocarbons in the presence of a supported ruthenium catalyst in the presence of hydrogen (step b).