WO2005077505B1 - Counter current mixing reactor - Google Patents

Counter current mixing reactor

Info

Publication number
WO2005077505B1
WO2005077505B1 PCT/GB2005/000483 GB2005000483W WO2005077505B1 WO 2005077505 B1 WO2005077505 B1 WO 2005077505B1 GB 2005000483 W GB2005000483 W GB 2005000483W WO 2005077505 B1 WO2005077505 B1 WO 2005077505B1
Authority
WO
WIPO (PCT)
Prior art keywords
mixing
fluids
fluid
inlet
reactor
Prior art date
Application number
PCT/GB2005/000483
Other languages
French (fr)
Other versions
WO2005077505A2 (en
WO2005077505A3 (en
Filing date
Publication date
Priority claimed from GBGB0402963.3A external-priority patent/GB0402963D0/en
Priority to DE602005014740T priority Critical patent/DE602005014740D1/en
Priority to EP05708308A priority patent/EP1713569B1/en
Priority to US10/589,311 priority patent/US7566436B2/en
Priority to DK05708308T priority patent/DK1713569T3/en
Priority to AU2005211990A priority patent/AU2005211990B2/en
Application filed filed Critical
Priority to KR1020067018374A priority patent/KR101153043B1/en
Priority to CA2597480A priority patent/CA2597480C/en
Priority to AT05708308T priority patent/ATE432761T1/en
Priority to JP2006552685A priority patent/JP5084266B2/en
Publication of WO2005077505A2 publication Critical patent/WO2005077505A2/en
Publication of WO2005077505A3 publication Critical patent/WO2005077505A3/en
Publication of WO2005077505B1 publication Critical patent/WO2005077505B1/en

Links

Abstract

A mixing reactor for mixing efficiently streams of fluids of differing densities. In a preferred embodiment, one of the fluids is supercritical water, and the other is an aqueous salt solution. Thus, the reactor enables the production of metal oxide nanoparticles as a continuous process, without any risk of the reactor blocking due to the inefficient mixing inherent in existing reactor designs.

Claims

AMENDED CLAIMS[Received by the International Bureau on 23 November 2005 (23.11.05) original claims I, 4, 14, 17 and 20-31 amended; remaining claims unchanged (4 pages)].
1. A counter current mixing reactor for continuously mixing two or more fluids of differing densities comprising a first inlet and an outlet characterised in that one or more further inlets are diametrically opposed to the first inlet and are disposed within the outlet, wherein at least one of the fluids is in the sub critical, near critical or supercritical state.
2. A mixing reactor as defined in claim 1 comprising a first inlet and an outlet characterised in that a further inlet is diametrically opposed to the first inlet and is disposed within the outlet.
3. A mixing reactor as defined in claim 1 or claim 2 arranged in a vertical configuration.
4. A mixing reactor as defined in any preceding claim wherein at least one of the fluids is heated, pressurised or supercritical water.
5. A mixing reactor as defined in claim 4 wherein the fluid of lower density is kept hot using a heater around the outlet.
6. A mixing reactor as defined in any of claims 1 to 5 wherein at least one of the fluids is a solution of a metal salt or compound.
7. A mixing reactor as defined in claim 6 wherein at least one of the fluids is an aqueous solution of a metal salt or compound.
8. A mixing reactor as defined in claim 7 wherein the aqueous solution is an aqueous metal salt solution of the metals selected from transition metals including ruthenium, cadmium, rhodium, palladium, iron, cerium, titanium, zirconium, copper and silver.
9. A mixing reactor as defined in any of claims 1 to 8 wherein the fluid of higher density is cooler than the fluid of lower density.
10. A mixing reactor as defined in claim 9 wherein the fluid of higher density is cooled using a heat sink.
11. A mixing reactor as defined in any of claims 1 to 10 wherein the one or more further inlets comprise a shaped nozzle, for example, a conical funnel.
12. A mixing chamber comprising one or more mixing reactors as defined in any of claims 1 to 11 arranged in series .
13. A process for preparing metal or metal oxide nanoparticles which comprises delivery of a metal salt solution through a first inlet of a mixing reactor as defined in any of claims 1 to 11 and delivery of a fluid in the sub critical, near critical or supercritical state through a further inlet diametrically opposed to the first inlet wherein said further inlet is disposed within an outlet such that the mixed solutions exit the reactor once mixed.
14. A process for preparing metal or metal oxide nanoparticles which comprises mixing a solution of supercritical water with an aqueous metal salt solution, characterised in that the aqueous metal salt solution is cooled prior to mixing.
15. Metal or metal oxide nanoparticles obtainable by a process as defined in claim 13 or claim 14. 21
16. A device capable of mixing two fluids of differing densities having a downwardly facing outlet for less dense fluid and inlet for more dense fluid adapted to cause an upwards flow of the more dense fluid in use, the arrangement being such that the less dense fluid is introduceable into the device in a downwards orientation relative to the upwards flow of the denser fluid.
17. A device as specified in claim 16, characterised by the inlet of the less dense fluid having a conical nozzle to aid mixing of the fluids.
18. A device as specified in claim 16 or claim 17 in which the denser of the two solutions is cooled prior to entry into the reactor.
19. Fluid mixing apparatus in which two or more devices specified in any of claims 16 to 18 are used in series.
20. Use of the device of any one of claims 1 to 19 to mix two fluids of differing densities such that the mixing occurs within the device.
21. Use as claimed in claim 20 in which one or both fluids is/are in the near critical or supercritical state.
22. Use as claimed in claim 20 or claim 21, in which one of the fluids is near-critical or supercritical water.
23. Use as claimed in any of claims 20 to 22, in which one of the fluids is an aqueous salt solution.
24. Use as claimed in any of claims 20 to 23, in which the device of claims 16 to 19 is used in the synthesis of metal nanoparticles. 22
25. Use as claimed in claim 24 in which the device of claims 16 to 19 is used to produce nano-particulate cerium oxide.
26. Use as claimed in claim 24 in which the device of claims 16 to 19 is used to produce nano-particulate titanium oxide.
27. Use as claimed in claim 24 in which the device of claims 16 to 19 is used to produce nano-particulate zirconium oxide.
28. Use as claimed in claim 24 in which the device of claims 16 to 19 is used to produce nano-particulate copper oxide.
29. Use as claimed in claim 24 in which the device of claims 16 to 19 is used to produce nano-particulate silver oxide.
30. Use as claimed in claim 24 in which the device of claims 16 to 19 is used to produce mixed metal oxides, specifically mixed copper and zinc oxides .
31. A process for continuously mixing two or more fluids of different densities comprising delivering a first fluid in a first direction of flow and delivering of one or more further fluids in a second direction of flow diametrically opposed to the first direction of flow so that the fluids mix at a mixing region the mixed fluids being carried away from the mixing region by the flow of one of the fluids, and wherein at least one of the fluids is in the subcritical, near critical or supercritical state.
PCT/GB2005/000483 2004-02-11 2005-02-11 Counter current mixing reactor WO2005077505A2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP2006552685A JP5084266B2 (en) 2004-02-11 2005-02-11 Countercurrent mixing reactor
EP05708308A EP1713569B1 (en) 2004-02-11 2005-02-11 Counter current mixing reactor and related process
US10/589,311 US7566436B2 (en) 2004-02-11 2005-02-11 Counter current mixing reactor
DK05708308T DK1713569T3 (en) 2004-02-11 2005-02-11 Counter current mixing plant and associated process
AU2005211990A AU2005211990B2 (en) 2004-02-11 2005-02-11 Counter current mixing reactor
DE602005014740T DE602005014740D1 (en) 2004-02-11 2005-02-11 COUNTER-MIXED REACTOR AND RELATED PROCESS
KR1020067018374A KR101153043B1 (en) 2004-02-11 2005-02-11 Counter current mixing reactor
CA2597480A CA2597480C (en) 2004-02-11 2005-02-11 Counter current mixing reactor
AT05708308T ATE432761T1 (en) 2004-02-11 2005-02-11 COUNTERFLOW MIXING REACTOR AND RELATED PROCESS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0402963.3A GB0402963D0 (en) 2004-02-11 2004-02-11 Counter current mixing device for two different fluids
GB0402963.3 2005-02-11

Publications (3)

Publication Number Publication Date
WO2005077505A2 WO2005077505A2 (en) 2005-08-25
WO2005077505A3 WO2005077505A3 (en) 2005-11-10
WO2005077505B1 true WO2005077505B1 (en) 2006-01-12

Family

ID=32011683

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2005/000483 WO2005077505A2 (en) 2004-02-11 2005-02-11 Counter current mixing reactor

Country Status (13)

Country Link
US (1) US7566436B2 (en)
EP (1) EP1713569B1 (en)
JP (1) JP5084266B2 (en)
KR (1) KR101153043B1 (en)
CN (2) CN103831074B (en)
AT (1) ATE432761T1 (en)
AU (1) AU2005211990B2 (en)
CA (1) CA2597480C (en)
DE (1) DE602005014740D1 (en)
DK (1) DK1713569T3 (en)
ES (1) ES2327755T3 (en)
GB (1) GB0402963D0 (en)
WO (1) WO2005077505A2 (en)

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