Composite adsorbents for purifying hydrocarbon streams
AssigneeUop LLC
InventorVladislav I. Kanazirev
Life of this patent
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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.
Claims16
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 from about 0.015 to 0.08 moles of the metal as the oxide per 100 g of adsorbent and where the alumina is present in an amount from about 40 to about 90 wt. % of the adsorbent.
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 sodium, potassium, lithium, rubidium, cesium and mixtures thereof the metal component present in an amount from about 0.015 to about 0.08 moles of metal as the oxide per 100 g of adsorbent and where the alumina is present in an amount from about 40 to about 90 wt. % of the adsorbent;
- the process comprising 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 conditions to give a cured shaped article and activating the cured article at activation conditions to give the solid shaped adsorbent.
Dependencies are inferred from the claim text.