Adsorbent compositions
First Claim
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1. Adsorbent compositions for use in the adsorption of elemental mercury consisting essentially of a support material selected from the class consisting of aluminosilicates, ion-exchange resins, alumina, silica and carbon;
- a cation selected from the group consisting of antimony, arsenic, bismuth, cadmium, cobalt, copper, gold, indium, iron, lead, manganese, molybdenum, mercury, nickel, platinum, silver, tin, tungsten, titanium, vanadium, zinc, zirconium and mixtures thereof wherein the cation is present in an amount which is at least 20 percent of the total of the amount required to occupy the cation sites; and
a polysulfide.
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Abstract
Adsorbent compositions and their preparation are disclosed for the adsorption of elemental mercury.
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Citations
21 Claims
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1. Adsorbent compositions for use in the adsorption of elemental mercury consisting essentially of a support material selected from the class consisting of aluminosilicates, ion-exchange resins, alumina, silica and carbon;
- a cation selected from the group consisting of antimony, arsenic, bismuth, cadmium, cobalt, copper, gold, indium, iron, lead, manganese, molybdenum, mercury, nickel, platinum, silver, tin, tungsten, titanium, vanadium, zinc, zirconium and mixtures thereof wherein the cation is present in an amount which is at least 20 percent of the total of the amount required to occupy the cation sites; and
a polysulfide. - View Dependent Claims (2)
- a cation selected from the group consisting of antimony, arsenic, bismuth, cadmium, cobalt, copper, gold, indium, iron, lead, manganese, molybdenum, mercury, nickel, platinum, silver, tin, tungsten, titanium, vanadium, zinc, zirconium and mixtures thereof wherein the cation is present in an amount which is at least 20 percent of the total of the amount required to occupy the cation sites; and
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3. The process for the preparation of adsorbent compositions for elemental mercury comprising:
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(a) providing a support material selected from the class consisting of aluminosilicates, alumina, ion-exchange resins, carbons and silicas with at least one cation capable of forming an insoluble polysulfide and selected from the group consisting of antimony arsenic, bismuth, cadmium, cobalt, copper, gold, indium, iron, lead, manganese, molybdenum, mercury, nickel, platinum, silver, tin, tungsten, titanium, vanadium, zinc, zirconium and mixtures thereof; and (b) contacting the cation-containing support material of step (a) with a sulfide-forming species and a polysulfide-forming species. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification