# US 2014/0155260 A1 · Composition and process for mercury removal

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- Number: US 2014/0155260 A1
- Document ID: US20140155260A1
- Status: Published application
- Kind: A1
- Application number: 13/691,977
- Filed: 2012-12-03
- Published: 2014-06-05
- Earliest claimed: 2012-12-03
- Assignees: Sud-Chemie AG
- Applicants: Sud-Chemie Inc.
- Inventors: Wayne Turbeville; Greg Korynta; Todd Cole; Jeffery L. Braden
- Web page: https://patentgrep.com/patent/US20140155260A1

## CPC

- B01J 20/20: comprising free carbon; comprising carbon obtained by carbonising processes
- B01D 15/00: Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D 53/64: Heavy metals or compounds thereof, e.g. mercury
- B01J 20/0237: {Compounds of Cu}
- B01J 20/0248: {Compounds of B, Al, Ga, In, Tl (B01J20/08 takes precedence)}
- B01J 20/0285: {Sulfides of compounds other than those provided for in B01J20/045}
- B01J 20/08: comprising aluminium oxide or hydroxide; comprising bauxite
- B01J 20/106: {Perlite}
- B01D 2253/102: Carbon
- B01D 2253/104: Alumina
- B01D 2253/106: Silica or silicates
- B01D 2253/108: Zeolites
- B01D 2253/11: Clays
- B01D 2253/1128: Metal sulfides
- B01D 2255/104: Silver
- B01D 2255/106: Gold
- B01D 2255/20707: Titanium
- B01D 2255/20715: Zirconium
- B01D 2255/20738: Iron
- B01D 2255/20746: Cobalt
- B01D 2255/20753: Nickel
- B01D 2255/20761: Copper
- B01D 2255/20769: Molybdenum
- B01D 2255/20792: Zinc
- B01D 2256/245: Methane
- B01D 2257/602: Mercury or mercury compounds
- B01J 2220/42: Materials comprising a mixture of inorganic materials (materials coated or impregnated on a carrier B01J20/32)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)

## Abstract

A process for removing mercury from a gas or liquid phase, wherein the gas or liquid phase containing mercury is placed in contact with a composition comprising a precipitated metal sulfide. The precipitated metal sulfide may be made by the process of combining a metal source, sulfide source, and modifier to form the precipitated metal sulfide. The metal source may comprise iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, silver, or gold salts. The metal salt may be selected from metal nitrate, metal sulfate, metal phosphate, metal acetate, metal carbonate, metal hydroxide, metal ammonium carbonate, and metal hydroxycarbonate. The sulfide source is selected from hydrogen sulfide (H2S), carbonyl sulfide (COS), salts of sulfide (S2-), salts of hydrosulfide (HS—), and salts of polysulfide (Sn2-). The modifier may be selected from alumina, silica, aluminosilicate, clay, zeolites, carbon, cement, titania, zirconia

## Claims

### Claim 1

A process for removing mercury from a gas or liquid phase, wherein a gas or liquid phase containing mercury is placed in contact with a composition comprising a precipitated metal sulfide.

### Claim 2 (depends on 1)

The process of claim 1, wherein the precipitated metal sulfide comprises a metal selected from iron, cobalt, nickel, copper, zinc, zirconium, molybdenum, silver, and gold.

### Claim 3 (depends on 1)

The process of claim 1, wherein the precipitated metal sulfide comprises copper sulfide.

### Claim 4 (depends on 3)

The process of claim 3, wherein the precipitated copper sulfide is formed from a metal salt selected from copper nitrate, copper sulfate, copper phosphate, copper acetate, copper carbonate, copper hydroxide, copper ammonium carbonate, and copper hydroxycarbonate.

### Claim 5 (depends on 3)

The process of claim 3, wherein the composition is formed in the presence of a modifier, wherein the modifier is selected from alumina, silica, aluminosilicate, clay, zeolites, carbon, cement, titania, and zirconia.

### Claim 6 (depends on 5)

The process of claim 5, wherein the modifier comprises alumina.

### Claim 7 (depends on 5)

The process of claim 5, wherein the modifier comprises perlite or activated carbon.

### Claim 8 (depends on 5)

The process of claim 5, wherein the composition is extruded and dried prior to contacting the gas or liquid phase containing mercury.

### Claim 9 (depends on 8)

The process of claim 8, wherein the extruded composition has a mercury adsorption capacity of about 13,000 μg-Hg/g-A or more.

### Claim 10 (depends on 8)

The process of claim 8, wherein the extruded composition has a mercury adsorption capacity of about 40,700 μg-Hg/g-A or more.

### Claim 11 (depends on 2)

The process of claim 2, wherein the composition is a powder.

### Claim 12 (depends on 2)

The process of claim 2, wherein the composition is extruded and dried prior to contacting the gas or liquid phase containing mercury.

### Claim 13 (depends on 5)

The process of claim 5, wherein the composition comprises about 20% to about 80% precipitated copper sulfide, and about 20% to about 80% modifier.

### Claim 14

A composition comprising a precipitated copper sulfide made by the process of combining a copper source, sulfide source, and modifier;
wherein the copper source is selected from copper nitrate, copper sulfate, copper phosphate, copper acetate, copper carbonate, copper hydroxide, copper ammonium carbonate, and copper hydroxycarbonate;
wherein the sulfide source is selected from hydrogen sulfide (H2S), carbonyl sulfide (COS), salts of sulfide (S2−), salts of hydrosulfide (HS−), and salts of polysulfide (Sn2−); and
wherein the modifier is selected from alumina, silica, aluminosilicate, clay, zeolites, carbon, cement, titania, zirconia.

### Claim 15 (depends on 14)

The composition of claim 14, wherein the composition is extruded and dried.

### Claim 16 (depends on 15)

The composition of claim 15, wherein the extruded composition has a mercury adsorption capacity of about 13,000 μg-Hg/g-A or more.

### Claim 17 (depends on 15)

The composition of claim 15, wherein the extruded composition has a mercury adsorption capacity of about 40,700 μg-Hg/g-A or more.

### Claim 18 (depends on 14)

The composition of claim 14, wherein the modifier comprises alumina.

### Claim 19 (depends on 14)

The composition of claim 14, wherein modifier comprises perlite or activated carbon.

### Claim 20 (depends on 14)

The composition of claim 14, wherein the composition is a powder.

### Claim 21

A process for making a precipitated metal sulfide comprising mixing an aqueous solution of a copper source, an aqueous solution of a sulfide source, and a modifier;
wherein the copper source is selected from copper nitrate, copper sulfate, copper phosphate, copper acetate, copper carbonate, copper hydroxide, copper ammonium carbonate, and copper hydroxycarbonate;
wherein the sulfide source is selected from hydrogen sulfide (H2S), carbonyl sulfide (COS), salts of sulfide (S2−), salts of hydrosulfide (HS−), and salts of poly sulfide (Sn2−); and
wherein the modifier is selected from alumina, silica, aluminosilicate, clay, zeolites, carbon, cement, titania, zirconia.