US4338169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for promoting physical and/or chemical reactions performed in a fluid medium
Assignee: Extramet SA
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Filing: 1980-01-16
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Granted: 1982-07-06
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Expires: 2000-01-16
Abstract
Abstract The process comprises subjecting a magnetic material dispersed in the fluid to the action of a variable magnetic field. It is thus possible to provide efficient stirring of this fluid and to facilitate reactions taking place, between a constituent of the fluid medium, and particles dispersed in this fluid, including a substance at least partly active at the surface. They may be, in particular, a ferromagnetic solid substance and a compound in solution in the fluid and non-magnetic.
Inventors
- 👤 Gerard Bienvenu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:37
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/42; B01F; B01F33/00; B01F33/45; B01F33/451; F; F28; F28F; F28F13/00; F28F13/16
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
99 words
A process for promoting physical and/or chemical reactions performed in a fluid medium, comprising moving a magnetic solid material freely dispersed in said fluid medium and formed, at least at the surface, of a substance playing a physical and/or chemical role in said reaction, by subjecting said material to the effect of a variable magnetic field comprising providing the magnetic field with sufficient intensity to impart to the particles of said material momentary speeds of movement relative to the fluid, and varying it, in intensity, position and/or direction, so as to maintain the particles in suspension in the fluid.
Claim 2
Dependent Claim
99 words
A process for promoting physical and/or chemical reactions performed in a fluid medium, comprising moving a magnetic solid material freely dispersed in said fluid medium and formed, at least at the surface, of a substance playing a physical and/or chemical role in said reaction, by subjecting said material to the effect of a variable magnetic field comprising providing the magnetic field with sufficient intensity to impart to the particles of said material momentary speeds of movement relative to the fluid, and varying it, in intensity, position and/or direction, so as to maintain the particles in suspension in the fluid.
Claim 3
Dependent Claim
22 words
A process according to claim 1, wherein the magnetic field is varied periodically between two opposite directions in at least one position.
Claim 4
Dependent Claim
22 words
A process according to claim 1, wherein said substance is selected to react chemically with at least one constituent in the fluid.
Claim 5
Dependent Claim
26 words
A process according to claim 1, wherein said process is applied to a physical and/or chemical reaction bringing into play two products having different magnetic properties.
Claim 6
Dependent Claim
39 words
A process according to claim 1, wherein said reaction is an oxido-reduction reaction between a solid substance, constituting at least part of the surface of said magnetic particles, and a relatively non-magnetic compound, constituting said fluid at least partially.
Claim 7
Dependent Claim
12 words
A process according to claim 5, wherein said solid substance is ferromagnetic.
Claim 8
Dependent Claim
59 words
A process according to claim 1, wherein said reaction is an electro-chemical reaction occurring at the potential of a solid mass immersed in said fluid medium, and wherein said material is formed of conductive particles which reach the potential of the solid mass due to the contact therewith under the effect of stirring due to the variable magnetic field.
Claim 9
Dependent Claim
30 words
A process according to claim 1, wherein said material is a magnetic ore and said medium is an acid solution dissolving constituents of said ore into reduced or oxidized ions.
Claim 10
Dependent Claim
24 words
A process according to claim 8, wherein said ore is ilmenite and the medium is a sulfuric acid solution dissolving iron from the ore.
Claim 11
Dependent Claim
20 words
A process according to claim 8, comprising magnetically dispersing a copper or nickel sulfide ore in an acid oxidizing solution.
Claim 12
Dependent Claim
52 words
A process according to claim 1, wherein said fluid medium is a zinc containing solution with undesired ions from metals less electropositive than zinc and said material is made of magnetic particles covered with zinc thereby causing exchange of said undesired ions from the dissolved state with said zinc from the particles.
Claim 13
Dependent Claim
66 words
A process according to claim 1, wherein said fluid medium is a zinc containing solution with undesired ions from metals less electropositive than zinc and said material is made of iron conductive particles and wherein solid zinc metal is immersed in said medium, the particles being contacted with said metal due to their movements under said variable magnetic field thereby causing deposition of solid undesired ions.
Claim 14
Dependent Claim
74 words
A process according to claim 1, wherein said fluid medium is a zinc containing solution with undesired ions from metals less electropositive than zinc and said material is made of iron conductive particles and the reaction is carried out in the presence of a cathode at the di-solution potential for zinc and with which the particles are contacted due to their movements under said variable magnetic field thereby causing deposition of said undesired ions.
Claim 15
Dependent Claim
81 words
A process for promoting physical and/or chemical reactions performed in a fluid medium comprising moving a magnetic solid material freely dispersed in said fluid medium and formed, at least at the surface, of a substance playing a physical and/or chemical role in said reaction, by subjecting said material to the effect of a variable magnetic field, wherein said reaction is an oxido reduction reaction involving the exchange of a metal from the solid state with a metal from the dissolved state.
Claim 16
Dependent Claim
81 words
A process for promoting physical and/or chemical reactions performed in a fluid medium comprising moving a magnetic solid material freely dispersed in said fluid medium and formed, at least at the surface, of a substance playing a physical and/or chemical role in said reaction, by subjecting said material to the effect of a variable magnetic field, wherein said reaction is an oxido reduction reaction involving the exchange of a metal from the solid state with a metal from the dissolved state.
Claim 17
Dependent Claim
25 words
A process according to claim 1, wherein said fluid medium is a dilute copper solution and said magnetic material is composed of dispersed iron particles.
Claim 18
Dependent Claim
61 words
A process according to claim 1, wherein said reaction is a catalytic hydrogenation reaction of a liquid phase, comprising constituting said solid material by magnetic particles coated with a catalytic agent and using said variable magnetic field to agitate said particles and make said particles circulate repeatedly through part of the liquid phase and through part of a gaseous hydrogen phase.
Claim 19
Dependent Claim
13 words
A process according to claim 16 wherein said particles are coated with zinc.
Claim 20
Dependent Claim
34 words
A process according to claim 1, wherein the fluid medium is flowing in one direction and the magnetic field is continuously varied and has at least one component transverse to the direction of flow.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |