WO2000060018A1 - A method of suppressing dust in a mine using an alkyl polyglucoside composition - Google Patents
A method of suppressing dust in a mine using an alkyl polyglucoside composition Download PDFInfo
- Publication number
- WO2000060018A1 WO2000060018A1 PCT/US2000/006444 US0006444W WO0060018A1 WO 2000060018 A1 WO2000060018 A1 WO 2000060018A1 US 0006444 W US0006444 W US 0006444W WO 0060018 A1 WO0060018 A1 WO 0060018A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- alkyl
- mine
- alkyl polyglucoside
- dust
- aqueous composition
- Prior art date
Links
- 125000000217 alkyl group Chemical group 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000000428 dust Substances 0.000 title claims abstract description 32
- 239000000203 mixture Substances 0.000 title claims abstract description 27
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 18
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 11
- 238000000638 solvent extraction Methods 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 238000005187 foaming Methods 0.000 claims abstract description 6
- 238000009736 wetting Methods 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 21
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 3
- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000000605 extraction Methods 0.000 description 11
- 239000007787 solid Substances 0.000 description 11
- 238000005065 mining Methods 0.000 description 10
- 238000005191 phase separation Methods 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000008346 aqueous phase Substances 0.000 description 6
- 239000012074 organic phase Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 239000011343 solid material Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- UNJGEWYTCXNJEE-UHFFFAOYSA-N 3-butyl-1-hydroxyimino-1-phenylheptan-2-ol Chemical compound CCCCC(CCCC)C(O)C(=NO)C1=CC=CC=C1 UNJGEWYTCXNJEE-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000011260 aqueous acid Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000010828 animal waste Substances 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 229910001431 copper ion Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 231100000584 environmental toxicity Toxicity 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 210000000497 foam cell Anatomy 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000003864 humus Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H15/00—Compounds containing hydrocarbon or substituted hydrocarbon radicals directly attached to hetero atoms of saccharide radicals
- C07H15/02—Acyclic radicals, not substituted by cyclic structures
- C07H15/04—Acyclic radicals, not substituted by cyclic structures attached to an oxygen atom of the saccharide radical
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/22—Materials not provided for elsewhere for dust-laying or dust-absorbing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C47/00—Machines for obtaining or the removal of materials in open-pit mines
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
Definitions
- the amount of the alkyl polyglucoside in the spray solution is an effective amount which is any amount effective to suppress the generation of dust from the friable solid onto which the solution is applied. Typically, the amount will be from about 10 ppm to about 1000 ppm of alkyl polyglucoside in water with the preferred amount being from about 25 ppm to about 100 ppm.
- 2- E60 is the copper extraction point at 60 seconds.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Biotechnology (AREA)
- Genetics & Genomics (AREA)
- General Health & Medical Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Saccharide Compounds (AREA)
- Detergent Compositions (AREA)
Abstract
A method of suppressing dust in and around a mine in which a metal ore obtained from the mine is treated with a leach solution followed by a solvent extraction process, comprising wetting the dust with an aqueous composition comprising at least one alkyl polyglucoside in which the alkyl group contains an average of from 8 to 12 carbon atoms and the alkyl polyglucoside has a degree of polymerization of from 1.4 to 1.6, wherein the aqueous composition is low foaming and is otherwise compatible with the solvent extraction process.
Description
A METHOD OF SUPPRESSING DUST IN A MINE USING AN ALKYL POLYGLUCOSIDE COMPOSITION
BACKGROUND OF THE INVENTION: Air pollution from airborne dust is a problem in many mining operations such as copper mining. Since open pit copper mines are usually located in desert areas, haul roads and points of ore transfer such as dump pockets and conveyer belt transfer points are particular sources of dust. Conventional mine dust suppression methods typically comprise spraying a solution of a dust suppressant composition onto surfaces that normally generate dust such as haul roads, etc. These compositions and methods are summarized in U.S. patent 5,223,165, the entire contents of which are incorporated herein by reference.
The methods and compositions described in U.S. 5,223,165 are not all satisfactory for use in open pit copper mining operations using solvent extraction for metal recovery because many of those surfactants used in the spray solutions interfere with the phase separation step. More specifically, in open pit copper mining operations wherein the ore is referred to as oxide ore, the copper is recovered from the ore by leaching with aqueous acid. The leaching is accomplished by trickling aqueous acid, such as dilute sulfuric acid, over and through pieces of ore having a relatively large surface area. The leach solution dissolves salts of copper and other metals as it trickles through the ore, to provide an aqueous solution of the mixture of metal values. The aqueous solution is mixed in tanks with an extraction reagent which is dissolved in an organic solvent, e.g., a kerosene. This is commonly referred to as the organic phase. The reagent includes an extractant
chemical which selectively forms metal-extractant complex with the copper ions in preference to ions of other metals. The step of forming the complex is called the extraction or loading stage of the solvent extraction process. The organic phase is transferred to a large settling tank, where the organic solvent, now containing the copper-extractant complex in solution, is separated from the depleted aqueous solution (aqueous phase). This part of the process is called phase separation. Usually, the process of extraction is repeated through two or more mixer/settler stages, in order to more completely extract the desired metal. The process is described in detail in U.S. patent 4,582,689, the entire contents of which are incorporated herein by reference.
If the ore that is used is coated with some surfactants, the phase separation does not occur cleanly. That is, the surfactant acts as an emulsifier, causing the organic and aqueous phases to become suspended in each other thereby retarding the rate of phase separation and creating a ragged interface as opposed to a sharp, well-defined interface. The ill-defined interface is characterized by the presence of elongated drops of organic material suspended from the organic phase into the lower aqueous phase. This undesirable material is generally referred to as "rag" and either fails to separate or separates only after a long period of time thus adding cost to the entire process.
It would be desirable to use a dust suppressing composition in open pit copper mining operations which causes minimal interference with the phase separation step of the extraction process for the recovery of heavy
metals from their ores such as the recovery of copper from copper ore in open pit mining operations.
BRIEF SUMMARY OF THE INVENTION: The surprising discovery has been made that dust suppressing compositions containing alkyl polyglycosides that exhibit low wetting times and weak emulsifying properties cause minimal interference with the phase separation step of the extraction process for the recovery of heavy metals from their ores such as the recovery of copper from copper ore in open pit mining operations. Such alkyl polyglycosides have alkyl groups that contain an average of from 8 to 12 carbon atoms and a degree of polymerization of from 1.4 to 1.6. Such alkyl polyglycosides rapidly wet the solid material such as rocks and dust etc., onto which they are applied, retard the rate of water evaporation from the applied solids, exhibit acceptable foaming levels and are environmentally acceptable in that they are readily biodegradable and exhibit low toxicity and favorable aquatic and eco-toxicity. The present invention relates to a process for suppressing dust which comprises contacting a particulate solid in a substantially dry environment with an effective amount of an aqueous solution of an alkyl polyglucoside or alkyl polyglucoside mixture of the formula I
RιO(Z)a I wherein Ri is a monovalent alkyl radical having on average from 8 to 12 carbon atoms; Z is a glucose residue; a is a number having a value from 1.4 to 1.6.
The above alkyl polyglucosides and mixtures thereof also provide
rapid phase disengagement, clean interface after phase separation, rapid kinetics of copper extraction, good selectivity for copper over iron extraction, low tendency for foaming (important when diluting and filling water trucks), and low viscosity for ease of handling. DETAILED DESCRIPTION:
The process according to the invention relates to the suppression of dust from a particulate, friable solid. By "dust" is meant any particulate solid material that is susceptible to suspension in air or other atmospheric environment. Accordingly, the term dust includes particles having an average diameter of up to 1 cm (though typically only up to about 300 micron) and down into the fume range (e.g. typically as low as 0.001 micrometers). The particulate friable solid will be in a substantially dry, non-fluid environment, e.g. the solid will be comprised of less than about 15% by weight water. The friable solids can have a varying chemical composition. Examples include stones, ores particles, organic materials e.g. sawdust, grain dust, fiber dust, or animal waste, and mineral particles, especial silicic or carbonaceous minerals, e.g. coal dust, soil dust (humus and/or subsoil), gravel dust, fine clay, lime dust, fly ash, and the like.
The alkyl polyglucosides or mixtures thereof that are useful in the process according to the invention are those of the formula I
1. GLUCOPON® 220 Surfactant - an alkyl polyglucoside in which the alkyl group contains 8 to 10 carbon atoms, an average alkyl group size of about 9.1 carbon atoms, and having an average degree of polymerization of 1.5.
2. APG® 325 Surfactant - an alkyl polyglucoside in which the alkyl group contains 9 to 11 carbon atoms and having an average degree of polymerization of 1.6.
3. GLUCOPON® 425 Surfactant - an alkyl polyglucoside in which the alkyl group contains 8 to 16 carbon atoms, an average alkyl group size of about 10.3 carbon atoms, and having an average degree of polymerization of 1.45. The GLUCOPON® 425N surfactant is identical to GLUCOPON® 425 except that it has been neutralized.
Related Cognis surfactants that are however, outside the scope of the invention, include the following:
1. GLUCOPON® 225 Surfactant - an alkyl polyglucoside in which the alkyl group contains 8 to 10 carbon atoms, an average alkyl group size of about 9.1 carbon atoms, and having an average degree of polymerization of 1.7.
2. GLUCOPON® 625 Surfactant - an alkyl polyglucoside in which the alkyl group contains 12 to 16 carbon atoms, an average alkyl group size of about 12.8 carbon atoms, and having an average degree of polymerization of 1.6.
Solutions of the alkyl polyglucosides are applied to solid materials capable of forming dust particles as described above. These aqueous
solutions can be placed in contact with the friable solid material in any manner effective to suppress the generation of dust therefrom. For example, the composition can be sprayed on a friable solid prior to or even during activity i.e. the imposition of mechanical stress (e.g. compaction, shearing, grinding, grading, shoveling, and the like) which causes the generation of dust from the solid. The aqueous composition can also be atomized (i.e. misted) into a atmosphere comprised of a finely divided solid to both aid in precipitation or settling of the solid and in minimizing regeneration of dust from the precipitate.
The amount of the alkyl polyglucoside in the spray solution is an effective amount which is any amount effective to suppress the generation of dust from the friable solid onto which the solution is applied. Typically, the amount will be from about 10 ppm to about 1000 ppm of alkyl polyglucoside in water with the preferred amount being from about 25 ppm to about 100 ppm.
In addition to the above alkyl polyglucosides, these aqueous solutions can also contain a hydrophilic binder material, such as an acrylic latex or a polysaccharide.
The invention will be illustrated but not limited by the following examples.
EXAMPLES Example 1
The following dust suppressants were tested by a standard QC extraction performance test that was conducted using 5v/v% 5-nonyl-2-
hydroxyacetophenone oxime with Cu/Fe aqueous feed spiked with surfactant at the indicated level of active component. The results are set forth in Table 1 below:
TABLE 1
(a) not according to the invention NR = not relevant ND = not determined
Discussion
GLUCOPON® 625 is not according to the invention because it's average alkyl group size is 12.8 carbons. DUSTCON® is not according to the invention because it is does not contain an alkyl polyglucoside.
GLUCOPON® 625 is undesirable for two reasons. (1) It contributes to the formation of "rag" at the organic/aqueous interface after phase separation. This is believed due to the higher average carbon length of the alkyl chain, causing a greater tendency to stabilize emulsions. Rag is a relatively stable network of organic film that is suspended from the interface in the aqueous phase. Solvent extraction is normally conducted in continuous mixer-settlers, so that emulsion from the mixer must continuously and rapidly coalesce in the settler. If organic matter, such as "rag", builds up excessively, it will be swept out of the settler with the aqueous phase and be lost from the solvent extraction unit. If the rate of phase separation is too slow (see DUSTCON®), the emulsion itself will be swept out of the settler; this is known as "flooding:, and constitutes an emergency situation that is dealt with by shutdown of the solvent extraction unit or by much slower flow rates. (2) The viscosity of undiluted
material is very high. It would need to be diluted several times with water to be practical to handle in a mining situation. Typically, the surfactant is diluted as the mining water trucks are filled with water. This takes place in a very short time, and the turbulence when filling the truck provides the agitation to mix and dilute the surfactant from a high concentration (25%-
50%) to the application concentration (typically 25-50 ppm, or 0.0025 to 0.0050%). A very high viscosity material would not only be difficult to pump, it would be slow to disperse to a uniform concentration. DUSTCON® is also undesirable for three reasons. (1 ) Its heavy rag level will promote substantial entrainment of organic phase. (2) The slow phase disengagement rate will tend to cause flooding, limiting the rate at which liquids can be passed through a mixer-settler. (3) The higher tendency for foaming means greater problems when water trucks are filled. Example 2: 1. PERFORMANCE DATA a. Batch SX Data
The standard QC extraction performance test was conducted using 5 v/v% 5-nonyl-2-hydroxyacetophenone oxime with Cu/Fe aqueous feed spiked with surfactant at the indicated level of active component. The following abbreviations are used in all the tables below.
1- DUSTCON® is a commercial dust suppressant which is a trademark product of Nalco, Inc.
2- E60 is the copper extraction point at 60 seconds.
3- E300 is the copper extraction point at 300 seconds. 4- Fe300 is the amount of iron extracted at 300 seconds.
5- Cu/Fe is the copper/iron ratio.
6- Kinetics refers to the amount of copper extracted at 60 seconds as a % of
the amount at 300 seconds.
7- Phase Separation is the time required for the emulsion to separate completely into distinct organic and aqueous phases. Series 1
Series 2
c. Foaming Data
Dynamic foam cell evaluations were conducted in which the foam level in a 2L graduated cylinder is measured while circulating the solution and injecting onto the top at 4IJmin. The following data was obtained using 115 ppm hardness water, which corresponds to the water from a commercial mining operation used for road spraying. Times given are those required to reach 1200 ml foam volume, or descriptive results if 1200 ml wasn't reached.
50 ppm Active:
DUSTCON®: 3.5 min.
GLUCOPON® 425N: Reached 850 ml in 3 min, then decreased to 600 ml.
GLUCOPON® 220UP: Remained between 200-250 ml foam.
75 ppm Active:
DUSTCON®: 2.5 min.
GLUCOPON® 425N: 4 min. GLUCOPON® 220UP: Reached 400 ml in 1.5 min, then retreated to
200 ml.
100 ppm Active: DUSTCON®: 2.3 min.
GLUCOPON® 425N: 2.7 min.
GLUCOPON® 220UP: Reached 450 ml in 2.5 min, then retreated to 300 ml.
d. Evaporation Rate Data
The table below gives data from two sets of evaporation rate studies. Both were done with haul road soil, screened to -30 mesh. Soil in a pan was spray-wetted to 15% moisture using aqueous solutions of surfactants at the indicated ppm actives level. Pans were allowed to dry in our 43% relative humidity atmosphere, and were weighed each hour. In the first set, five different conditions were scouted. In the second set, DUSTCON® and GLUCOPON® 425N were compared at 50 ppm active in duplicate tests. As a measure of evaporation rate, the percent of total water loss (equilibrium) which is gone in two hours is given in the following table.
% of Total Water Loss Observed in Two Hours
Surfactant - ppm active 1 st Set 2nd Set*
Dl water 75.9% 76.1% DUSTCON® - 50 ppm 70.7% 72.1%
GLUCOPON® 425N - 50 ppm 65.4% 68.1% GLUCOPON® 425N - 200 ppm 67.1 % GLUCOPON® 220 - 50 ppm 66.5%
* average of two determinations Total Water Loss as % of Initial Weight
Surfactant - ppm active 1 st Set 2nd Set*
Dl water 13.9% 13.1%
DUSTCON® - 50 ppm 13.5% 13.1%
GLUCOPON® 425N - 50 ppm 12.8% 13.2% GLUCOPON® 425N - 200 ppm 12.9%
GLUCOPON® 220 - 50 ppm 13.3% * average of two determinations The time to reach 47g (roughly equivalent to about 3% moisture remaining in the soil) is: Surfactant - ppm active 1st Set 2ndSet
Water 2.0 hr 2.1 hr
DUSTCON® - 50 ppm 2.3 hr 2.4 hr
GLUCOPON® 425N - 50 ppm 2.7 hr 2.5 hr
Claims
1. A method of suppressing dust in and around a mine in which metal ore obtained from the mine is treated with a leach solution followed by a solvent extraction process, comprising wetting the dust with an aqueous composition comprising at least one alkyl polyglucoside in which the alkyl group contains an average of from 8 to 12 carbon atoms and the alkyl polyglucoside has degree of polymerization of from 1.4 to 1.6, wherein the aqueous composition is low foaming, and is otherwise compatible with the solvent extraction process.
2. The method of claim 1 wherein the at least one alkyl polyglucoside has the formula
RιO (Z)a wherein Ri is a monovalent alkyl radical having an average from 8 to 12 carbon atoms, Z is a glucose residue, and a is a number of from 1.4 to 1.6.
3. The method of claim 1 wherein the aqueous composition contains from about 10ppm to about lOOOppm of alkyl polyglucoside.
4. The method of claim 3 wherein the aqueous composition contains from about 25 ppm to about 100ppm of alkyl polyglucoside.
5. The method of claim 2 wherein the alkyl polyglucoside is a mixture in which the alkyl group contains from 8 to 16 carbon atoms.
6. The method of claim 5 wherein the mixture of alkyl polyglucosides has an average degree of polymerization of about 1.45.
7. The method of claim 1 wherein the mine is a copper mine.
8. The method of claim 1 wherein the aqueous composition also contains a hydrophilic binder material.
9. The method of claim 2 wherein the aqueous composition contains from about 10ppm to about lOOOppm of alkyl polyglucoside.
10. The method of claim 9 wherein the aqueous composition contains from about 25ppm to about 10Oppm of alkyl polyglucoside.
11. The method of claim 2 wherein the, mine is a copper mine.
12. The method of claim 2 wherein the aqueous composition also contains a hydrophilic binder material.
13. A method of suppressing dust in and around a copper mine in which copper ore is treated with a leach solution followed by a solvent extraction process, comprising wetting the dust with an aqueous solution of a mixture of alkyl polyglucosides in which the alkyl groups contain an average of from 8 to 12 carbon atoms and the alkyl polyglucoside has a degree of polymerization of from 1.4 to 1.6, wherein the aqueous solution contains from about 10ppm to about lOOOppm of alkyl polyglucosides.
14. The method of claim 13 wherein the aqueous solution contains from about 25ppm to about 100ppm of alkyl polyglucosides.
15. The method of claim 13 wherein the alkyl polyglucoside has a degree of polymerization of about 1.45, and an average alkyl group size of about 10.3 carbon atoms.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU41714/00A AU4171400A (en) | 1999-04-05 | 2000-04-05 | A method of suppressing dust in a mine using an alkyl polyglucoside composition |
| MXPA01009578A MXPA01009578A (en) | 1999-04-05 | 2000-04-05 | A method of suppressing dust in a mine using an alkyl polyglucoside composition. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12777399P | 1999-04-05 | 1999-04-05 | |
| US60/127,773 | 1999-04-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2000060018A1 true WO2000060018A1 (en) | 2000-10-12 |
Family
ID=22431879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US2000/006444 WO2000060018A1 (en) | 1999-04-05 | 2000-04-05 | A method of suppressing dust in a mine using an alkyl polyglucoside composition |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU4171400A (en) |
| MX (1) | MXPA01009578A (en) |
| PE (1) | PE20001589A1 (en) |
| WO (1) | WO2000060018A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008015582A2 (en) * | 2006-06-15 | 2008-02-07 | Cognis Ip Management Gmbh | Process for improving phase separations in solvent extraction circuits of metal winning |
| CN109054752A (en) * | 2018-07-26 | 2018-12-21 | 太原理工大学 | A kind of underground coal mine face is without sulphur foam dust suppression agent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4650598A (en) * | 1985-03-18 | 1987-03-17 | Calgon Corporation | Method and emulsions for the control of dust |
| US4971720A (en) * | 1987-04-24 | 1990-11-20 | Betz Laboratories | Method for suppressing process dust emissions |
| US5143645A (en) * | 1987-04-24 | 1992-09-01 | Betz Laboratories | Method for suppressing process dust emissions using a salt of a fatty acid as a foaming agent |
| US5223165A (en) * | 1988-05-31 | 1993-06-29 | Henkel Kommanditgesellschaft Auf Aktien | Use of alkyl glycosides for dust suppression |
-
2000
- 2000-04-05 WO PCT/US2000/006444 patent/WO2000060018A1/en active Application Filing
- 2000-04-05 AU AU41714/00A patent/AU4171400A/en not_active Abandoned
- 2000-04-05 MX MXPA01009578A patent/MXPA01009578A/en not_active Application Discontinuation
- 2000-04-05 PE PE2000000301A patent/PE20001589A1/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4650598A (en) * | 1985-03-18 | 1987-03-17 | Calgon Corporation | Method and emulsions for the control of dust |
| US4971720A (en) * | 1987-04-24 | 1990-11-20 | Betz Laboratories | Method for suppressing process dust emissions |
| US5143645A (en) * | 1987-04-24 | 1992-09-01 | Betz Laboratories | Method for suppressing process dust emissions using a salt of a fatty acid as a foaming agent |
| US5223165A (en) * | 1988-05-31 | 1993-06-29 | Henkel Kommanditgesellschaft Auf Aktien | Use of alkyl glycosides for dust suppression |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008015582A2 (en) * | 2006-06-15 | 2008-02-07 | Cognis Ip Management Gmbh | Process for improving phase separations in solvent extraction circuits of metal winning |
| WO2008015582A3 (en) * | 2006-06-15 | 2008-07-10 | Cognis Ip Man Gmbh | Process for improving phase separations in solvent extraction circuits of metal winning |
| US8298510B2 (en) | 2006-06-15 | 2012-10-30 | Basf Corporation | Process for improving phase separations in solvent extraction circuits |
| CN109054752A (en) * | 2018-07-26 | 2018-12-21 | 太原理工大学 | A kind of underground coal mine face is without sulphur foam dust suppression agent |
| CN109054752B (en) * | 2018-07-26 | 2021-04-20 | 太原理工大学 | Sulfur-free foam dust-settling agent for underground coal mine excavation surface |
Also Published As
| Publication number | Publication date |
|---|---|
| PE20001589A1 (en) | 2001-02-09 |
| AU4171400A (en) | 2000-10-23 |
| MXPA01009578A (en) | 2002-03-14 |
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