摘要:
The invention relates to a novel catalyst for the selective hydrogenation of unsaturated hydrocarbons. It is characterized in that the catalyst contains a group VIII metal deposited on a support previously modified by an element chosen from within group IIIA constituted by gallium and indium.
摘要:
Process for eliminating jointly arsenic and carbon oxysulfide from an unsaturated hydrocarbon cut, wherein said hydrocarbon cut is contacted with an absorbing mass containing a support and lead oxide, comprising contacting the hydrocarbon cut in the liquid phase.
摘要:
Supported palladium-gold catalyst of high resistance to poisoning by sulfur compounds, not subject to elution by vinylacetylene and not inducing a substantial formation of oligomers, for use in hydrogenation reactions wherein acetylenics and diolefins are selectively hydrogenated, said catalyst being obtained by the steps of: admixing a palladium compound with an inorganic carrier, roasting in the presence of an oxygen-containing gas, treating with a reducing agent, admixing a halogenated gold compound with the resulting composition, treating with a reducing agent, treating with a compound having a basic reaction so as to lower the halogen content of the catalyst below 10 ppm by weight, and roasting, in the presence of an oxygen-containing gas, the palladium and gold compounds being used in convenient proportions so that the catalyst contains 0.03 to 1% palladium and 0.003 to 0.3% gold by weight.
摘要:
A process for the regeneration of a sulfur containing catalysts, wherein the catalyst is stripped of sulfur before the oxychlorination treatment of the regeneration process, typically before the catalyst is sent to the regeneration zone. The process is particularly useful for catalyst employed in hydrocarbon conversions such as dehydrogenation reactions, particularly those which comprise the injection of sulfur and/or at least one sulfur compound before or simultaneously to the introduction of the charge into the first reaction zone.
摘要:
A process for the selective hydrogenation of unsaturated hydrocarbons is characterized in that the catalyst contains a group VIII metal and an element chosen from within the group constituted by gallium and indium.
摘要:
The invention relates to a method of eliminating mercury or arsenic from a fluid in the presence of a solid mass for the recovery of mercury and/or arsenic. The said mass contains copper and sulphur at least partly in the form of copper sulphide and results (a) from the incorporation of a copper compound other than a sulphide into a solid mineral support, (b) possible calcination of the product obtained in stage (a), and from bringing the product obtained previously into contact with elementary sulphur and (d) a heat treatment.
摘要:
Disclosed is a process for selective hydrogenation in liquid phase of an effluent originating from an ethane steam cracker in which said effluent is contacted with a catalyst consisting of at least supported palladium characterized in that it is carried out in the presence of a liquid phase containing at least part of the hydrogenated gasoline cut, condensed and recycled, of said effluent.Said effluent (1), said liquid phase (8) and possibly hydrogen (13) pass through the hydrogenation reactor (4). The product obtained is fractionated (5) into a gaseous cut at the top (7) containing ethylene and a liquid gasoline cut at the bottom which is partially recycled (8).The process may be used for production of ethylene and for production of gasoline.
摘要:
Process for elimination of mercury in hydrocarbon charges wherein said charge is contacted, under hydrogen, with a catalyst containing at least one metal from the group consisting of nickel, cobalt, iron and palladium followed by--or mixed with--a capture mass containing sulfur or a metal sulfide.
摘要:
Process for the selective hydrogenation of the acetylenic hydrocarbons of a C.sub.4 hydrocarbons cut, containing butadiene and at least 1% by weight of acetylenic hydrocarbons, without substantial hydrogenation of butadiene, wherein said hydrocarbons cut in liquid phase and hydrogen are contacted with a supported catalyst containing 0.05 to 0.5% by weight of palladium and 0.05 to 1% by weight of silver, the Ag/Pd ratio by weight being at least 0.7.
摘要:
The invention concerns a process for the elimination of mercury from hydrocarbons by passage of the feedstock with hydrogen over a catalyst then bringing the product obtained into contact with a mercury retention bed, the catalyst comprising at least one element selected from the group constituted by iron, nickel, cobalt, molybdenum, tungsten, palladium, wherein at least 5% is in the sulphide state. Any arsenic present in the feedstock is also eliminated.In accordance with the invention, the catalyst is simultaneously presulphurated and reduced.The invention results in a considerable reduction in operation period and high retention efficiency at temperatures between 120.degree. C. and 250.degree. C. and in the presence of 0-1000 mg of sulphur/kg of feed.