# US 10,767,129 B2 · Asphalt-based dust control formulations > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,129 B2 - Document ID: US10767129B2 - Status: Granted - Kind: B2 - Application number: 15/421,550 - Filed: 2017-02-01 - Published: 2017-08-03 - Granted: 2020-09-08 - Earliest claimed: 2016-02-01 - Assignees: Henry Company, LLC - Applicants: Henry Company, LLC - Inventors: Amba Ayambem; Daniel B. Kent; John C. Dobson - Web page: https://patentgrep.com/patent/US10767129B2 ## CPC - C10L 5/24: Combating dust during {shaping or} briquetting; Safety devices against explosion - C04B 22/0093: {Aluminates} - C04B 24/36: Bituminous materials, e.g. tar, pitch {(C04B24/243 takes precedence)} - C09C 1/021: {Calcium carbonates} - C09C 1/56: Treatment of carbon black {; Purification} - C09C 3/10: Treatment with macromolecular organic compounds {(C09C3/006 takes precedence)} - C09K 3/22: for dust-laying or dust-absorbing - C10L 5/02: {Solid fuels such as} briquettes consisting mainly of carbonaceous materials of mineral {or non-mineral} origin (peat briquettes C10F) - C10L 5/32: Coating - C04B 2103/0075: {Anti-dusting agents} - C10L 2230/08: Inhibitors - C10L 2230/14: for improving storage or transport of the fuel - C10L 2250/08: Emulsion details - C10L 2290/18: Spraying or sprinkling - C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS - 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 - C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS} - C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE ## Abstract This disclosure describes formulations and methods for dust control, for example, coal topping, a term which refers to the application of liquid products to the top of coal loads, such as those in open topped coal hopper railcars as commonly used today to transport coal. Disclosed herein are asphalt-based emulsion formulations that accomplish dust control during industrial operations in which dust handling is required. ## Claims ### Claim 1 A method for controlling dust on a surface of a bulk material, comprising: (I) preparing a dust control formulation (DCF) comprising a dust reduction additive (DRA) emulsion comprising: (i) asphalt, (ii) at least one first defoamer, and (iii) at least one emulsifier, wherein said at least one emulsifier is a low-fatty acid emulsifier comprising: (a) water, (b) a fatty acid solution, (c) a base, and (d) a stabilizer and (II) applying said dust control formulation to said surface of said bulk material in an amount effective for dust control. ### Claim 2 (depends on 1) The method as recited in claim 1, wherein said dust control formulation is applied by sprinkling, and/or a spray nozzle. ### Claim 3 (depends on 1) The method as recited in claim 1, wherein said dust control formulation further comprises a first water. ### Claim 4 (depends on 1) The method as recited in claim 1; wherein said asphalt in said DRA is from about 30% to about 70% by weight of the DRA. ### Claim 5 (depends on 1) The method as recited in claim 1; wherein said asphalt in said DRA is from about 30% to about 70% by weight of the DRA; wherein said at least one first defoamer in said DRA is from about 0.00005% to about 0.00030% by weight of the DRA; and wherein said at least one emulsifier in said DRA is from about 30% to about 70% by weight of the DRA. ### Claim 6 (depends on 1) The method as recited in claim 1, wherein said asphalt in said DRA is an asphalt blend. ### Claim 7 (depends on 1) The method as recited in claim 1, wherein said DCF further comprises a binder; a preservative; a rheology modifier; and/or a surfactant. ### Claim 8 (depends on 1) The method as recited in claim 1, wherein said dust-reduction additive emulsion further comprises a second water; a base; and a dispersant. ### Claim 9 (depends on 1) The method as recited in claim 1, wherein the weight of said dust reduction additive emulsion is in the range of from about 0.01% to about 20% by weight of said dust control formulation. ### Claim 10 (depends on 1) The method as recited in claim 1, wherein the weight of said dust reduction additive emulsion is in the range of from about 0.1% to about 10% by weight of said dust control formulation. ### Claim 11 (depends on 1) The method as recited in claim 1, wherein said dust control formulation is applied to the surface of said bulk material at the rate of from about 0.001 to about 5.0 gallon per square yard for controlling dust. ### Claim 12 (depends on 1) The method as recited in claim 1, wherein said bulk material is coal, limestone, fly ash, cement, carbon black, coke, or mineral material. ### Claim 13 (depends on 1) The method as recited in claim 1, wherein said bulk material is coal, and said dust control formulation is applied the top of said coal load in an open-topped, coal-hopper railcar, used for transporting coal. ### Claim 14 (depends on 1) The method of claim 1, wherein the base of the DRA includes potassium hydroxide. ### Claim 15 (depends on 1) The method of claim 1, wherein the base of the DRA includes ammonium hydroxide. ### Claim 16 (depends on 1) The method of claim 1, wherein the DRA further comprises abietic acid. ### Claim 17 (depends on 1) The method of claim 1, wherein the stabilizer of the DRA includes ethylene-vinyl acetate-vinyl alcohol terpolymer. ### Claim 18 (depends on 1) The method of claim 1, wherein the DRA further comprises a suspension agent. ### Claim 19 (depends on 1) The method of claim 1, wherein the DRA further comprises a second defoamer. ### Claim 20 (depends on 18) The method as recited in claim 18, wherein said suspension agent is a clay slurry.