GB2102301A - Solids extraction process - Google Patents
Solids extraction process Download PDFInfo
- Publication number
- GB2102301A GB2102301A GB08122714A GB8122714A GB2102301A GB 2102301 A GB2102301 A GB 2102301A GB 08122714 A GB08122714 A GB 08122714A GB 8122714 A GB8122714 A GB 8122714A GB 2102301 A GB2102301 A GB 2102301A
- Authority
- GB
- United Kingdom
- Prior art keywords
- process according
- aqueous
- component
- weighting agent
- added
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007787 solid Substances 0.000 title claims abstract description 31
- 238000000605 extraction Methods 0.000 title claims description 10
- 239000008346 aqueous phase Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 239000012074 organic phase Substances 0.000 claims abstract description 21
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 230000003750 conditioning effect Effects 0.000 claims abstract description 13
- 239000012071 phase Substances 0.000 claims abstract description 13
- 239000010432 diamond Substances 0.000 claims abstract description 12
- 239000006185 dispersion Substances 0.000 claims abstract description 10
- 239000000725 suspension Substances 0.000 claims abstract description 9
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 8
- 230000005661 hydrophobic surface Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000003153 chemical reaction reagent Substances 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 10
- 235000013980 iron oxide Nutrition 0.000 claims description 8
- 239000002223 garnet Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- RVHSTXJKKZWWDQ-UHFFFAOYSA-N 1,1,1,2-tetrabromoethane Chemical group BrCC(Br)(Br)Br RVHSTXJKKZWWDQ-UHFFFAOYSA-N 0.000 claims description 3
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 3
- -1 carbon chain amines Chemical class 0.000 claims description 3
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 claims description 3
- 238000009877 rendering Methods 0.000 claims description 3
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 2
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 2
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 2
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000005642 Oleic acid Substances 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 claims description 2
- 239000002734 clay mineral Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 claims description 2
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- 229910003460 diamond Inorganic materials 0.000 claims 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 abstract description 2
- 230000016507 interphase Effects 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 235000002639 sodium chloride Nutrition 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- FJLUATLTXUNBOT-UHFFFAOYSA-N 1-Hexadecylamine Chemical class CCCCCCCCCCCCCCCCN FJLUATLTXUNBOT-UHFFFAOYSA-N 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical class [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 description 2
- 229910001622 calcium bromide Inorganic materials 0.000 description 2
- 235000011148 calcium chloride Nutrition 0.000 description 2
- WGEFECGEFUFIQW-UHFFFAOYSA-L calcium dibromide Chemical compound [Ca+2].[Br-].[Br-] WGEFECGEFUFIQW-UHFFFAOYSA-L 0.000 description 2
- 230000001143 conditioned effect Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010443 kyanite Substances 0.000 description 2
- 229910052850 kyanite Inorganic materials 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- VNDYJBBGRKZCSX-UHFFFAOYSA-L zinc bromide Chemical compound Br[Zn]Br VNDYJBBGRKZCSX-UHFFFAOYSA-L 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000009775 high-speed stirring Methods 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 235000011147 magnesium chloride Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 229940102001 zinc bromide Drugs 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D12/00—Displacing liquid, e.g. from wet solids or from dispersions of liquids or from solids in liquids, by means of another liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
- B03B1/04—Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/02—General arrangement of separating plant, e.g. flow sheets specially adapted for oil-sand, oil-chalk, oil-shales, ozokerite, bitumen, or the like
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Solid components are extracted from aqueous dispersions or suspensions by contacting portions of the aqueous phase with a substantially immiscible organic phase while maintaining an interphase. The solid component has a naturally predominantly hydrophobic surface or a conditioning agent is used to render the solid component at least temporarily hydrophobic. A weighting agent is added to the aqueous or organic phase to increase the density difference between the phases. The process may be used to recover diamonds from an aqueous dispersion or suspension of diamonds and garnets, in which a conditioning agent e.g. oil is used and the weighting agent e.g. stearate-coated iron oxide is added to the aqueous phase. Other uses and other weighting agents (solid and liquid) are disclosed.
Description
SPECIFICATION
Solids extraction process
This invention relates to the extraction of a solids component from an aqueous dispersion or suspension of solids containing the desired component.
Published G.B. Patent Applications Nos.
2,028,1 72A and 2,049,466A relate to extraction of a solids component from an aqueous dispersion or suspension containing the solid component by contacting the aqueous dispersion or suspension with a substantially immiscible non-aqueous phase. Published Application No. 2,028,1 72A is concerned with the separation of solid impurities from the aqueous phase by contacting the aqueous phase with an organic phase comprising a non-polar organic liquid in the presence of a collector reagent which gives the impurities a hydrophobic surface. The contacting is such as to maintain an interface between the two phases. An interfacial layer is formed containing at least a proportion of the impurities and can be removed independently.
Published G.B. Patent Application No.
2,049,466A on the other hand is concerned with the enhancement of an extraction process for extracting a desired component from an aqueous phase by contact with a non-aqueous phase by the introduction of a deflocculating agent to the aqueous phase. The deflocculating agent acts to reduce the viscosity of the aqueous phase and promote transfer of the component from the aqueous phase. The reduction of viscosity is particularly necessary when dealing with solids in the aqueous phase of particle size predominantly less than 5 microns, especially when working at high solids concentrations of greater than 50% by weight.
Both the above applications ignore the problems which can occur when dealing with solids of larger particle size where the weight of the particles makes it impractical to employ conventional extraction procedures.
According to the present invention we provide a process for the extraction of a solid component from an aqueous dispersion or suspension of solids containing the component comprising contacting the aqueous phase with a substantially immiscible organic phase comprising a non-polar organic liquid by continuously bringing portions of the aqueous and organic phases into contact while maintaining an interface between the two phases and wherein said solid component naturally exhibits a predominantly hydrophobic surface or at least one conditioning reagent is present capable of rendering said component at least temporarily hydrophobic and wherein a weighting agent has been added to the aqueous or organic phase to increase the difference in density between the phases.
Preferably the weighting agent is added to the aqueous phase so that the weighted aqueous phase lies beneath a lighter organic phase. Thus it is usually the cheap aqueous phase which retains
the unwanted solids and can be discarded, while the more expensive organic phase can be
recycled. The weighting agent may be a liquid
such as phosphoric acid or a solid, such as
barytes, an iron oxide, ilmenite or a clay mineral or
a soluble but heavy salt (such as potassium
carbonate and the various brine-forming halides, for example potassium, sodium, magnesium and
calcium chlorides and mixtures of potassium
chloride with sodium chloride, potassium bromide with sodium chloride, calcium bromide with
calcium chloride and zinc bromide with calcium
bromide). Alternatively the weighting agent may
be added to the organic phase so that it lies
beneath the aqueous phase.Suitable weighting agents for the organic phase are organic soluble compounds such as tetrabromoethane or
hydrophobic solids such as oleophillic iron oxide or iron filings. Clearly the weighting agent must be chosen so as not to react adversely with the other components of the system.
The organic phase may be any suitable nonpolar organic material such as kerosene, carbon tetrachloride, benzene or paraffin.
The invention is especially applicable to extraction of a component of large particle size, for example material at least 50% of which has a particle size greater than 50 y.
The conditioning reagent capable of rendering the desired component at least temporarily hydrophobic may be any of those discussed in
Published Specification No. 79251 69A, such as oleic acid, a long carbon chain amine or a petroleum sulphonate. The conditioning reagent may be naturally present in the aqueous phase, as for example the presence of organic salts in bitumen containing oil sands from which it is desired to extract not only bitumen but also metal values such as nickel, vanadium and titanium.
Alternatively the conditioning reagent may be added to the aqueous or organic phase prior to and/or during the contacting process. It is convenient to add the conditioning reagent before the contacting process so that vigorous mixing conditions can be employed as opposed to the comparatively gentle mixing conditions employed in the contacting process. Alternatively the desired solid component may naturally exhibit a predominantly hydrophobic surface.
The desired component may suitably be collected at the interface between the phases by removing the interfacial layer.
The contacting process is preferably carried out in a multi-compartment rotary contactor, such as that described in U.K. Patent Specification No.
972,035 and U.S. Patent Specification No.
3,649,209 through which the aqueous and organic streams are passed continuously, usually in countercurrent. While an interface between the streams is maintained, portions of one phase are repeatedly transferred into the other phase and vice versa to effect contacting. The use of such a contactor is valuable in that the phases are enclosed and operators are protected from noxious weighting agents such as tetrabromoethane, or reagents such as aqua regia or nitric acid/chlorine.
The present invention may be employed in many different ways.
The present invention is particularly useful in the separation of fine diamonds for industrial use.
Industrial diamonds are obtained from kimberlite gangue and difficulty is encountered in separating the diamonds from garnet which also occurs in kimberlite. Using the present invention, a solid such as stearate-coated iron oxide can be used to weight an aqueous dispersion of kimberlite, previously conditioned by high speed stirring with a small amount of oil as a collector reagent to render the diamonds, and any gold present, hydrophobic, while the garnet remains hydrophillic. If the conditioned kimberlite is then contacted with an organic phase, such as a light oil, in accordance with the invention, the diamonds and any gold present, can be recovered from the interface and separated from the garnet.
The residual gangue in the aqueous phase can be discarded or treated to recover the garnet. The organic phase can be recirculated. While the
process is particularly applicable to the recovery of fine diamonds for industrial use, it is contemplated that comparatively large diamonds may be
recovered by suitable weighting of the aqueous
layer.
Comparatively large particle size mica can
likewise be recovered from a clay gangue
contaminated with silica using a cetylamine salt
as collector to render the mica hydrophobic so that it can be collected at the aqueous/organic
interface. It is also contemplated that felspar can
be recovered from a quartz using a long chain fatty
amine plus hydrogen fluoride as depressant for the
silica and refractories such as kyanite recovered
from a quartz in comparatively large particle size
using a cetylamine salt as conditioning reagent.
Suitable weighting agents such as barytes,
ilmenite and iron oxides are used in each case
with a suitable immiscible organic phase. The
recovery of refractory materials such as kyanite
without substantially reducing the particle size is
valuable in that the optimum refractory properties
are maintained. Oil sands mixtures may also be
treated in accordance with the invention. Thus
bitumen, dispersed in an oil phase weighted with
oleophillic iron oxide, may have contaminating
clay removed therefrom. The oil sands contain
natural collector reagents such as phenolic,
sulphidic and carboxylic acids and salts. The iron
oxide may be recovered and reused and the
organic phase, freed from clay, further treated to
recover bitumen.
The use of the process of the invention
involving the increase in density of one phase in
the contacting process, also makes it easy to
separate the phases after contacting, in a
contactor as described in G.B. Patent Specification No. 972,035 and U.S. Patent Specification No.
3,649,209, or in a subsequently used centrifuge.
Claims (14)
1. A process for the extraction of a solid component from an aqueous dispersion or suspension of solids containing the component, comprising contacting the aqueous phase with a substantially immiscible organic phase comprising a non-polar organic liquid by continuously bringing portions of the aqueous and organic phases into contact while maintaining an interface between the two phases and wherein said solid component naturally exhibits a predominantly hydrophobic surface or at least one conditioning reagent is present capable of rendering said component at least temporarily hydrophobic and wherein a weighting agent has been added to the aqueous or organic phase to increase the difference in density between the phases.
2. A process according to claim 1, wherein the weighting agent is added to the aqueous phase.
3. A process according to claim 2 wherein the weighting agent is selected from phosphoric acid, barytes, iron oxides, ilmenite, clay minerals and soluble heavy salts.
4. A process according to claim 1 , wherein the weighting agent is added to the organic phase.
5. A process according to claim 4, wherein the weighting agent is selected from tetrabromoethane and oleophillic iron oxide or iron filings.
6. A process according to any one of the preceding claims wherein the solid component being extracted is of large particle size.
7. A process according to claim 6, wherein the solid component being extracted is of material at least 50% of which has a particle size greater than 50,u.
8. A process according to any one of the preceding claims, wherein a conditioning reagent is present.
9. A process according to claim 8, wherein the conditioning reagent is selected from oleic acid, long carbon chain amines and petroleum sulphonate.
10. A process according to claim 8 or 9, wherein the conditioning reagent is added to the aqueous phase before contacting with the organic phase.
11. A process according to any one of the preceding claims, wherein the solid component is collected by removing the interfacial layer.
12. A process according to any one of claims 1 to 3 or 6 to 11 wherein the aqueous phase is an aqueous dispersion or suspension containing diamonds and garnet, a conditioning reagent is
used to render the diamond component
hydrophobic, the weighting agent is added to the
aqueous phase and the diamond component is
recovered from the interface.
13. A process for the extraction of a solid component from an aqueous dispersion or suspension of solids containing the component substantially as described herein.
14. Solid components extracted by the process of any one of the preceding claims.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08122714A GB2102301B (en) | 1981-07-23 | 1981-07-23 | Solids extraction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08122714A GB2102301B (en) | 1981-07-23 | 1981-07-23 | Solids extraction process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2102301A true GB2102301A (en) | 1983-02-02 |
| GB2102301B GB2102301B (en) | 1984-08-01 |
Family
ID=10523437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08122714A Expired GB2102301B (en) | 1981-07-23 | 1981-07-23 | Solids extraction process |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2102301B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2265322A (en) * | 1992-03-26 | 1993-09-29 | De Beers Ind Diamond | Sorting particles |
| GB2363999A (en) * | 2000-06-28 | 2002-01-16 | Univ Delft Tech | Method of separating a particle mixture using a biphasic system |
-
1981
- 1981-07-23 GB GB08122714A patent/GB2102301B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2265322A (en) * | 1992-03-26 | 1993-09-29 | De Beers Ind Diamond | Sorting particles |
| GB2363999A (en) * | 2000-06-28 | 2002-01-16 | Univ Delft Tech | Method of separating a particle mixture using a biphasic system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2102301B (en) | 1984-08-01 |
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