Composite adsorbents for purifying hydrocarbon streams
AssigneeUop LLC
InventorVladislav I. Kanazirev
Life of this patent
Estimating the term…
Abstract
Applicant has developed an improved adsorbent useful in removing contaminants from various hydrocarbon streams. The adsorbent contains a zeolite, an alumina and a metal component. The metal component (Madd) is present in an amount at least 10 mole % the stoichiometric amount of metal (M) (expressed as the oxide) needed to balance the negative charge of the zeolite lattice. In a specific application an adsorbent comprising zeolite X, alumina and sodium is used to purify an ethylene stream in order to remove CO2, H2S, methanol, and other S— and O— containing compounds.
Claims28
A solid shaped adsorbent for purifying hydrocarbon streams comprising an alumina component, a zeolite component and a metal component (Madd), the metal component present in an amount at least 10 mole % of the stoichiometric amount of metal (M) needed to compensate for the negative charge of the zeolite lattice, expressed as the oxide.
A process for preparing a solid shaped adsorbent for purifying hydrocarbon streams comprising an alumina component, a zeolite component and a metal component (Madd) selected from the group consisting of alkali metals, alkaline earth metals and mixtures thereof, the metal component present in an amount at least 10 mole % of the stoichiometric amount of metal (M) needed to compensate for the negative lattice expressed as the oxide charge of the zeolite the process comprises forming a shaped article by combining an alumina component a zeolite component and a metal component precursor in any order to form a shaped article, curing the shaped article at curing condition's to give a cured shaped article and activating the cured article at activation conditions to give the solid shaped adsorbent.
A process for removing contaminants from hydrocarbon streams comprising contacting the stream with a solid shaped adsorbent, at adsorption conditions to remove at least a portion of at least one contaminant, the adsorbent comprising an alumina component, a zeolite component and an metal component, ), the metal component present in an amount at least 10 mole % of the stoichiometric amount of metal (M) needed to compensate for the negative lattice expressed as the oxide charge of the zeolite.
Dependencies are inferred from the claim text.