# US 2014/0360409 A1 · Ash Compositions Recovered from Coal Combustion Gases Having Reduced Emissions of HCl and/or Mercury

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0360409 A1
- Document ID: US20140360409A1
- Status: Published application
- Kind: A1
- Application number: 14/468,978
- Filed: 2014-08-26
- Published: 2014-12-11
- Earliest claimed: 2013-04-01
- Assignees: Fuel Tech, Inc.
- Applicants: Fuel Tech, Inc.
- Inventors: Christopher R. Smyrniotis; Kent W. Schulz; Emelito P. Rivera; Ian Saratovsky; Vasudeo S. Gavaskar
- Web page: https://patentgrep.com/patent/US20140360409A1

## CPC

- C04B 7/26: from raw materials containing flue dust {, i.e. fly ash (C04B7/243 takes precedence)}
- B01D 53/64: Heavy metals or compounds thereof, e.g. mercury
- B01D 53/685: {by treating the gases with solids}
- B01J 20/043: {Carbonates or bicarbonates, e.g. limestone, dolomite, aragonite}
- B01J 20/223: {containing metals, e.g. organo-metallic compounds, coordination complexes}
- B01D 2253/112: Metals or metal compounds not provided for in B01D2253/104 or B01D2253/106
- B01D 2253/304: Linear dimensions, e.g. particle shape, diameter
- B01D 2257/2045: Hydrochloric acid
- B01D 2257/602: Mercury or mercury compounds
- B01D 2258/0283: Flue gases
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- 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)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS

## Abstract

The description relates to production of fly ash with properties suitable for use in Portland cement. The fly ash compositions will contain coal ash, water-insoluble copper compositions and metallic mercury adsorbed onto ash particles. In one aspect, the coal ash composition will have a total mercury content of from 0.1 to 2.0 ppm and the water-soluble mercury is less than 20% of the total mercury content. The process entails combusting coal to produce hot combustion gases containing fly ash, CO2, chlorine, and mercury, cooling the combustion gases and introducing into the combustion gases at a temperature of less than 1000° F., preferably within the range of from about 250° to about 900° F., a copper-based chloride remediator (CBCR), and collecting the fly ash which comprises insoluble copper compositions and water insoluble mercury compositions.

## Claims

### Claim 1

A particulate product suitable for use in making cement, comprising:
a. coal ash, and
b. water-insoluble copper compositions,
wherein the water-insoluble copper compositions predominate in weight relative to water-soluble copper compositions.

### Claim 2

A particulate coal ash product, comprising:
a. coal ash,
b. water-insoluble copper chloride, and
c. water-soluble copper chloride,
wherein the water-insoluble copper chloride predominates in weight relative to the water-soluble copper chloride.

### Claim 3

A coal ash composition comprising:
a. coal ash,
b. water-insoluble copper chloride, and
c. metallic mercury adsorbed onto ash particles,
wherein the water-insoluble copper chloride predominates in weight relative to water-soluble copper chloride.

### Claim 4 (depends on 1, 2, 3)

A coal ash composition according to any of claims 1 to 3 wherein the total mercury content of the composition is from 0.1 to 2.0 ppm and the water-soluble mercury is less than 20% of the total mercury content.

### Claim 5 (depends on 1, 2, 3, 4)

A process for producing a fly ash according to any one of claims 1-4, comprising: combusting coal to produce hot combustion gases containing fly ash, CO2, chlorine, and mercury, cooling the combustion gases and introducing into the combustion gases at a temperature of less than 1000° F., preferably within the range of from about 250° to about 900° F., a copper-based chloride remediator (CBCR), and collecting the fly ash which comprises insoluble copper(I) compositions and water insoluble mercury compositions.

### Claim 6 (depends on 1, 2, 3, 4)

A process for producing a fly ash according to any one of claims 1-4, comprising: combusting coal to produce hot combustion gases containing fly ash, CO2, chlorine, and mercury, cooling the combustion gases and introducing into the combustion gases at a temperature of less than 1000° F., preferably within the range of from about 250° to about 900° F., a copper-based chloride remediator (CBCR), and collecting the fly ash which comprises insoluble copper compositions and water insoluble mercury compositions.