摘要:
A process for the selective hydrogenation of dienes present in a C.sub.3-6 mixed hydrocarbon stream is disclosed wherein the hydrocarbon stream is contacted with added hydrogen in the presence of a catalyst comprising about 1 to 30% by weight nickel on an aluminum sulfide support.
摘要:
Palladium or platinum is deposited on a low acidity silica polymorph/silicalite/high silica zeolites to yield a supported catalyst particularly useful in the hydrogenation of acetylenes and diolefins. The catalyst has a decreased tendency to promote polymerization which causes fouling than previously used alumina catalysts.
摘要:
A process for the hydrogenation of certain aromatic, olefinic and acetylenic compounds. The process is catalyzed by a zero-valent mixed metal catalyst which is in turn prepared by the reaction of an organic metal cluster compound wherein one of the metals is lithium with a complex of rhodium halide and an olefinic hydrocarbon ligand. The catalyst may, if desired, be deposited on a support such as alumina or silica. The hydrogenation process can, in many instances, be carried out under ordinary conditions, i.e., at room temperature and atmospheric pressure.
摘要:
A process for the preparation of novel zero-valent metal catalysts. The catalysts are prepared by the reaction of an organic metal cluster compound wherein one of the metals is lithium with a complex of a metal halide and a ligand. The catalyst may, if desired, be deposited on a support such as alumina or silica. It is effective to catalyze the hydrogenation of organic compounds such as benzene, styrene and the like.
摘要:
A catalyst for selective hydrogenation of highly unsaturated hydrocarbons in the presence of less unsaturated hydrocarbons comprises palladium supported on alumina having a defined combination of micromeritic properties, the palladium being present mainly in the regions of the catalyst particles not more than 150 microns beneath their geometric surface. The alumina is made suitably by calcining pseudobohmite at 1000.degree.-1200.degree. C. The catalyst has a long working life in "front-end" or "tail-end" hydrogenation.
摘要:
In a process for the selective hydrogenation of polyunsaturated compounds, by means of a catalyst system, the hydrogenation is carried out in gaseous phase in the presence of a catalyst of a metal of the eight group of the Periodical Table, partially deactivated by a deactivating system.
摘要:
Producton of cyclopentene by splitting of dicyclopentadiene to produce cyclopentadiene and hydrogenating the cyclopentadiene to produce the cyclopentene in crude form, and distilling the crude cyclopentene to separate low boilers and high boilers therefrom and provide the cyclopentene product. The high boilers are recycled to the dicyclopentadiene splitting stage and serve to reduce resin formation in that stage. The process is particularly effective where the dicyclopentadiene has a low content of the so-called "codimers" which, if present in sufficient amount, would reduce resin formation.