WO2016191019A2 - Coal dust treatment methods and compositions - Google Patents
Coal dust treatment methods and compositions Download PDFInfo
- Publication number
- WO2016191019A2 WO2016191019A2 PCT/US2016/029519 US2016029519W WO2016191019A2 WO 2016191019 A2 WO2016191019 A2 WO 2016191019A2 US 2016029519 W US2016029519 W US 2016029519W WO 2016191019 A2 WO2016191019 A2 WO 2016191019A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oxyl
- tetramethylpiperidin
- coal
- recited
- bis
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/24—Combating dust during shaping or briquetting; Safety devices against explosion
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/26—After-treatment of the shaped fuels, e.g. briquettes
- C10L5/32—Coating
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2200/00—Components of fuel compositions
- C10L2200/04—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/08—Inhibitors
- C10L2230/081—Anti-oxidants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/14—Function and purpose of a components of a fuel or the composition as a whole for improving storage or transport of the fuel
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2250/00—Structural features of fuel components or fuel compositions, either in solid, liquid or gaseous state
- C10L2250/04—Additive or component is a polymer
Definitions
- the present invention pertains to methods for treating coal and coal piles to inhibit fugitive coal dust dissemination, and coal auto-oxidation.
- Coal is a carbonaceous solid fossil fuel. It is extracted (mined) by surface or underground methods. Coal that is not yet mined, but is in the ground, that may or may not be exposed to the outside conditions is referred to as in-situ coal.
- Mined coal is usually crushed to a smaller size for transportation, handling and storage.
- the usual size for this crushed coal is less than eight inches (less than 200 mm).
- This invention treats both in-situ coal and extracted (mined) coal during transportation, handling and storage.
- mined coal can generate coal dust.
- Coal dust dissemination poses safety, health and environmental concerns.
- Coal dust suppression is desirable to minimize coal dust dissemination that may occur during coal pile storage or transit. Airborne fugitive coal dust particulates can lead to black lung disease and other illnesses.
- Coal has traditionally been stored in piles to reduce the intrusion of air and moisture and to thereby mitigate the oxidation process. Piling does not halt coal oxidation but is merely an attempt to slow the oxidation rate.
- the ideal coal pile is large enough to reduce the surface to volume ratio of the coal exposed to air, yet small enough that heat generated within the coal pile is dissipated into the surrounding environment.
- the large quantity of coal utilized makes ideal conditions difficult to achieve and incidents of coal self-ignition resulting from coal oxidation are common occurrences.
- Coal fires and coal dust explosions pose serious dangers to personnel and are costly in terms of damaged equipment and consumed coal.
- coal may be treated with aqueous based foam in order to suppress dissemination of the fine coal dust particles, or to aid in the application of a dust control binder.
- foams may be formed and applied as set forth, for example, in U.S. Patent 4,400,220 (Cole).
- Foaming agents such as certain amphoteric surfactants, anionic surfactants and nonionic surfactants may be employed to aid in foam building and dust suppression. Stability of the foam is an important
- a method of treating coal wherein a nitroxyl radical compound (NRC), an amine functionalized tannin or a quaternary ammonium compound is added to the coal.
- NRC nitroxyl radical compound
- the NRC is added to the coal in an amount of about 0.001 to 10 pounds per ton of coal with an addition rate of about 0.005-1 pound of the NRC per ton of coal also being noted as exemplary.
- a foaming agent such as those selected from the group of amphoteric, nonionic and anionic surfactants can be used.
- the NRC can be conjointly used with the surfactant to enhance foam stability and durability.
- the foaming agents include anionic surfactants and those comprising a long chain Cii-Cis alkenyl sulfonate salt such as C11-C16 alkenyl sodium sulfonate.
- the RC can be employed conjointly with a dust control agent (DC A) and applied to the coal.
- the DC A may, for example, comprise a variety of different polymers.
- the DCA comprises polymers chosen from i) epichlorohydrin (EPI)/polyalkylene polyamine/adipic acid terpolymers; ii) aminoalkylated polyacrylamides, and iii) quaternary ammonium polymers and copolymers.
- EPI epichlorohydrin
- polyalkylene polyamine/adipic acid terpolymers ii) aminoalkylated polyacrylamides
- quaternary ammonium polymers and copolymers quaternary ammonium polymers and copolymers.
- Aqueous compositions comprised of a) a nitroxyl radical (NRC) and one or more of b) dust control agent and c) foaming agent may be utilized where if a) and b) are present, for every 1-5 parts of a), there are 1-100 parts of b). If a) and c) are present, for every 1-5 parts of a) there are 0.01-10 parts of c). If all three of a) and b) and c) are present, for every 1-5 parts of a) there are 1-100 parts of b) and 0.01-10 parts of c).
- NRC nitroxyl radical
- a composition is comprised of the components described above where if a) and b) are present, for every 1 parts of a), there are 1-20 parts of b). If a) and c) are present, for every 1 part of a) there are 0.15- 2 parts of c). If all three of a) and b) and c) are present, for every 1 part of a) there are 1-20 parts of b) and 0.15-2 parts of c).
- a nitroxyl radical compound is provided to treat coal surfaces, such as coal piles, to retard coal auto-oxidation, self-heating and spontaneous combustion.
- the nitroxyl radical compound is used conjointly with a DCA such as a polymer to improve the dust control efficacy in its ability to agglomerate fine particles and inhibit dust dissemination.
- the NRC is added to the DCA along with an anionic foaming agent.
- the NRC and foaming agent can be added without DCA.
- the use of NRC with the foaming agent improves foam quality and stability.
- the NRC can have the following structure:
- R.2, R3, R 8 , R9 are each independently of one another substituted or un-substituted Ci - Ci 8 alkyl, C2 - Ci 8 alkenyl, or C2 - Ci 8 alkynyl; or
- R2 and R3 and/or R 8 and R9 together form with the linking carbon a C3 - C12 cycloalkyl radical
- R 4 , R5, R 6 , R7 are each independently of one another hydrogen, substituted or un- substituted Ci - Ci 8 alkyl, C2 - Ci 8 alkenyl, or C2 - Ci 8 alkynyl;
- Rio is hydrogen, phenyl, or substituted or unsubstituted Ci - Ci 8 alkyl
- Ri is hydrogen, phenyl, substituted or un-substituted Ci - Ci 8 alkyl, C2 - Ci 8 alkenyl, or C2 - Ci 8 alkynyl.
- Rio is hydrogen, phenyl, or substituted or unsubstituted Ci - C 6 alkyl
- Ri is hydrogen, substituted or un-substituted Ci - C 6 alkyl, C2 - C 6 alkenyl, or C2 - C 6 alkynyl.
- Exemplary nitroxyl radical compounds include derivations of dialkyl nitroxyl radicals and l-oxyl-2,2,6,6-tetraalkylpiperidine compounds such as 1- oxyl-2,2,6,6-tetramethylpiperidine, l-oxyl-2,2,6,6-tetramethylpiperidin-4-ol (4-HT), l-oxyl-2,2,6,6-tetramethylpiperidin-4-one, l-oxyl-2,2,6,6-tetramethylpiperidin-4-yl acetate, l-oxyl-2,2,6,6-tetramethylpiperidin-4-yl-2-ethylhexanoate, l-oxyl-2,2,6,6- tetramethylpiperidin-4-yl stearate, l-oxyl-2,2,6,6-tetramethylpiperidin-4-yl benzoate, l-oxyl-2,2,6,6-tetramethylpiperidin-4-yl benzoate,
- a polymer dust control agent in those situations in which dust control dissemination is desired, can be used conjointly with the NRC.
- DCA polymer dust control agent
- These polymer dust control agents are well known and are discussed for example in U.S. Patent 5,256,444, which is incorporated by reference herein in its entirety.
- Exemplary polymer DCAs are i) polymers having at least two of the following monomers: epichlorohydrin (epi), polyalkylene polyamine, and adipic acid; ii) polymers including aminoalkylated polyacrylamides; and iii) quaternary ammonium polymers and copolymers.
- the DCA polymer has three of the following monomers: epichlorohydrin (epi), polyalkylene polyamine, and adipic acid; ii) polymers including aminoalkylated polyacrylamides; and iii) quaternary ammonium polymers and copolymers.
- Exemplary members of these monomers in i) above are diethyltriamine, adipic acid and epichlorohydrin (epi), and other examples of DCAs can include ii) aminomethylated polyacrylamides, and iii) reaction products of quaternaryamine, dimethylamine, and epi.
- molecular weights for these polymers are 100,000 to 5,000,000. In another embodiment, molecular weights for these polymers are 300,000 to 2,500,000.
- the NRC is added in an amount of 0.002-5 lbs per ton of coal. In other embodiments, the NRC is added in an amount of 0.0035-2.5 lbs per ton of coal. In other embodiments, the NRC is added in an amount of 0.005-1.0 lbs per ton of coal.
- the NRC can be conjointly used with known foaming agents such as nonionic, such as alkyl polyglucoside, amphoteric, such as ether amines, or anionic, such as long chain alkenyl, surfactants.
- the foaming agent is an anionic surfactant with long alkenyl (Cii-Cis) chain.
- anionic surfactant is a sodium olefin (C14-C16) sulfonate.
- the aqueous based compositions has the above a) : b) : c) components therein, with the remainder of the composition including water and possibly other minor components.
- the RC and other components can be applied to coal in-situ or that has been extracted (mined), during transportation, handing or storage, at the mine site and or any subsequent location such as terminals, docks, storage yards, coal yards, power plants or other coal utilizing facilities.
- Aqueous sprays are often used for application to the coal.
- the NRC is applied by itself or in combination with or without a DCA applied as a foam.
- foaming agents such as those mentioned above are used in combination with the NRC.
- Example 1 In order to assess the efficacy of the materials in inhibition of coal dust self-ignition, coal self-heating tests were performed. This is an accelerated test method wherein a coal sample is heated to a predetermined temperature with a known quantity and flow of air being supplied. This method accelerates natural coal oxidation and leads to the coal reaching a thermal runaway state.
- Chemistries are prepared at two different concentrations in water, 0.5% and 2%. The chemistries are applied to the coal at a rate so that the same amount of moisture (4%) is added to all coal samples. Measurements:
- Temperature of the coal sample is measured and logged. Time for the coal sample to reach thermal runaway (typically at 200F) is recorded. The delay in time to thermal runaway for a treated coal sample versus blank and moisture only samples are used to evaluate anti-oxidation efficacy.
- a coal sample is weighed to 50g.
- the desired chemistry (or moisture blank) is applied to the coal dropwise.
- the coal is thoroughly mixed with the solution using a stainless steel spatula.
- the sample is mixed until homogenous, and then transferred to the reaction vessel.
- the test apparatus consists of rectangular vessel (reaction chamber) with 6 slots to place the reaction vessels and is connected to an auto temperature logger.
- the reaction chamber has a heater and is filled with silicone oil for heating.
- the required temperature of oil bath is set and the reaction vessels are placed in the chamber.
- the airflow is then started.
- the reaction chamber heating begins and starts heating the coal samples.
- Thermocouples are placed in the oil bath to measure the set temperature of the oil bath and continuously log bath temperature in the data acquisition system.
- Each reaction vessel is provided with two
- thermocouples at different points and temperature data is logged continuously.
- One blank coal sample and one moisture blank sample are included as controls along with the treated samples. Data is continuously logged until the coal has reached thermal runway.
- EX1 l-oxyl-2,2,6,6-tetramethylpiperidin-4-ol (4HT)
- EX2 quaternaryamine/dimethylamine/epichlorohydrin
- EX3 tannin/monoethanolamine/formaldehyde
- EX-1 performs at a level of inhibition comparable to known auto-oxidation inhibition polymers, which is surprising since traditional antioxidant products are polymeric, and EX-1 is a monomer.
- Dust Monitor - Lab scale dust monitor uses white light to determine dust levels of materials dropped into the sampling chamber.
- EX-1 namely 4HT was added to coal without any dust control agent, and in addition to a known dust control agent, namely an aqueous aminomethylated polyacrylamide (designated as "C2"). Dust control improvement is shown in following Tables 2 and 3.
- Table 2 shows that when 4HT alone is added to coal it has a negative impact on dust generation relative to water.
- DCA polymer dust control agent
- Example 3 - Foam Stability - 4HT was added to a known foaming agent, "C4", an anionic surfactant, sodium olefin (Ci4-Ci 6 ) sulfonate to determine its effect on foam stability.
- Waring Commercial Blender (Model 7011G) marked with 50 mL graduations
- C4 anionic surfactant, sodium olefin (Ci4-Ci 6 ) sulfonate
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2986900A CA2986900A1 (en) | 2015-05-25 | 2016-04-27 | Coal dust treatment methods and compositions |
KR1020177037078A KR20180012296A (en) | 2015-05-25 | 2016-04-27 | Pulverized coal treatment method and composition |
CN201680030579.3A CN107835850A (en) | 2015-05-25 | 2016-04-27 | Coal dust processing method and composition |
EP16734487.8A EP3303525A2 (en) | 2015-05-25 | 2016-04-27 | Coal dust treatment methods and compositions |
AU2016266725A AU2016266725B2 (en) | 2015-05-25 | 2016-04-27 | Coal dust treatment methods and compositions |
US15/576,114 US20180346834A1 (en) | 2015-05-25 | 2016-04-27 | Coal dust treatment methods and compositions |
JP2017561287A JP2018515675A (en) | 2015-05-25 | 2016-04-27 | Coal dust treatment method and composition |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN2615/CHE/2015 | 2015-05-25 | ||
IN2615CH2015 | 2015-05-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2016191019A2 true WO2016191019A2 (en) | 2016-12-01 |
WO2016191019A3 WO2016191019A3 (en) | 2017-01-05 |
Family
ID=56322273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2016/029519 WO2016191019A2 (en) | 2015-05-25 | 2016-04-27 | Coal dust treatment methods and compositions |
Country Status (8)
Country | Link |
---|---|
US (1) | US20180346834A1 (en) |
EP (1) | EP3303525A2 (en) |
JP (1) | JP2018515675A (en) |
KR (1) | KR20180012296A (en) |
CN (1) | CN107835850A (en) |
AU (1) | AU2016266725B2 (en) |
CA (1) | CA2986900A1 (en) |
WO (1) | WO2016191019A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102006439B1 (en) * | 2019-01-16 | 2019-08-01 | (주)미산알앤씨 | Multi-Functional Spontaneous ignition inhibiting Foam Concentrate for bituminous coal |
KR102301244B1 (en) * | 2021-03-29 | 2021-09-10 | 주식회사 블루오션에코 | Spontaneous combustion inhibitor of coal and method for inhibiting spontaneous combustion of coal using the same |
KR102560877B1 (en) * | 2021-08-18 | 2023-07-28 | 황성규 | Spontaneous combustion inhibitor of coal |
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US4400220A (en) | 1974-11-27 | 1983-08-23 | Cole Jr Howard W | Suppression of respirable dust with foam |
US5256444A (en) | 1990-08-29 | 1993-10-26 | Betz Laboratories, Inc. | Method for suppressing dust emissions from bulk solids |
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GB1592157A (en) * | 1976-12-09 | 1981-07-01 | British American Tobacco Co | Tobacco-smoke filters |
US4426409A (en) * | 1982-07-02 | 1984-01-17 | Nalco Chemical Company | Cationic polymers for use in freeze protection of coals and minerals |
US4558080A (en) * | 1984-01-24 | 1985-12-10 | Dearborn Chemical Company | Stable tannin based polymer compound |
US4650598A (en) * | 1985-03-18 | 1987-03-17 | Calgon Corporation | Method and emulsions for the control of dust |
US5296007A (en) * | 1986-11-17 | 1994-03-22 | Ensci Inc. | Process for removing sulfur from coal |
US5183575A (en) * | 1991-08-29 | 1993-02-02 | Betz Laboratories, Inc. | Methods for the flocculation of coal fines and insoluble metals in coal mine waters |
CN1058422A (en) * | 1991-08-30 | 1992-02-05 | 天津市煤建公司三厂 | The charcoal for roasting of directly lighting with match |
US5576056A (en) * | 1995-01-20 | 1996-11-19 | Betzdearborn Inc. | Composition and method for inhibiting coal oxidation |
US5777890A (en) * | 1996-01-11 | 1998-07-07 | Betzdearborn Inc. | Control of moisture addition to bulk solids |
US5648116A (en) * | 1996-01-17 | 1997-07-15 | Betzdearborn Inc. | Methods for suppressing dust emissions |
US20020010267A1 (en) * | 1999-03-09 | 2002-01-24 | Symyx Technologies, Inc., A Delaware Corporation | Block copolymers |
DE60006268T2 (en) * | 1999-09-15 | 2004-08-05 | Ciba Specialty Chemicals Holding Inc. | POLIMERIC STABILIZERS WITH HIGH AFFINITY TO THE PULPS |
US7208023B2 (en) * | 2002-02-15 | 2007-04-24 | Hazen Research, Inc. | Dry dust control materials |
US20050161234A1 (en) * | 2004-01-27 | 2005-07-28 | Umit Turunc | Method for suppression and prevention of coal fires |
RU2523317C2 (en) * | 2008-12-08 | 2014-07-20 | Эпплайд Острейлиа Пти Лтд | Rock dusting |
US20120171561A1 (en) * | 2009-09-18 | 2012-07-05 | Nec Corporation | Polymer radical material-activated carbon-conductive material composite, method for producing conductive material composite, and electricity storage device |
CN103615279B (en) * | 2013-11-27 | 2016-03-30 | 安徽淮河化工股份有限公司 | A kind of coal foam dedusting agent for mine |
CN103883347B (en) * | 2014-03-26 | 2016-08-24 | 辽宁工程技术大学 | A kind of full-service fluid foam for underground coal mine and using method thereof |
-
2016
- 2016-04-27 KR KR1020177037078A patent/KR20180012296A/en unknown
- 2016-04-27 JP JP2017561287A patent/JP2018515675A/en active Pending
- 2016-04-27 CA CA2986900A patent/CA2986900A1/en not_active Abandoned
- 2016-04-27 EP EP16734487.8A patent/EP3303525A2/en not_active Withdrawn
- 2016-04-27 WO PCT/US2016/029519 patent/WO2016191019A2/en unknown
- 2016-04-27 CN CN201680030579.3A patent/CN107835850A/en active Pending
- 2016-04-27 AU AU2016266725A patent/AU2016266725B2/en not_active Expired - Fee Related
- 2016-04-27 US US15/576,114 patent/US20180346834A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4400220A (en) | 1974-11-27 | 1983-08-23 | Cole Jr Howard W | Suppression of respirable dust with foam |
US5256444A (en) | 1990-08-29 | 1993-10-26 | Betz Laboratories, Inc. | Method for suppressing dust emissions from bulk solids |
Also Published As
Publication number | Publication date |
---|---|
KR20180012296A (en) | 2018-02-05 |
CA2986900A1 (en) | 2016-12-01 |
AU2016266725A1 (en) | 2017-11-30 |
AU2016266725B2 (en) | 2020-05-07 |
WO2016191019A3 (en) | 2017-01-05 |
EP3303525A2 (en) | 2018-04-11 |
CN107835850A (en) | 2018-03-23 |
US20180346834A1 (en) | 2018-12-06 |
JP2018515675A (en) | 2018-06-14 |
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