US3862347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid-liquid packed bed extraction
Assignee: General Foods Corp
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Filing: 1972-06-30
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Granted: 1975-01-21
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Expires: 1992-06-30
Abstract
Abstract Channeling of solvent in a compacted (packed) bed of solid particles during extraction of soluble material from the particles can be minimized or substantially eliminated by operating the system such that the viscosity of the extracting fluid (solvent) within the interstices formed between solid particles at every point in the porous packed bed progressively decreases in the direction of increasing concentration of soluble material in the solvent. Temperature control is one method of effecting the proper viscosity profile of the extracting fluid throughout the packed bed during the extraction process. The method, with respect to the extraction of soluble solids from roast and ground coffee provides an effective means for obtaining a high concentration of coffee solids in the effluent extract and at a high yield and relatively short residence time thus avoiding the need for further concentrating the extract prior to dehydration in the production of soluble coffee powder.
Inventors
- 👤 Henricus A Thijssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:34
CPC Classifications
A; A23; A23F; A23F5/00; A23F5/24; A23F5/26; A23F5/265; B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0226; B01D11/028; B01D11/0284
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
IN A MULTI-STAGE BATCH-CONTERCURRENT METHOD OF SOLVENT EXTRACTION OF SOLUBLE CONSTITUENTS FROM SOLID PARTICLES COMPACTED INTO STATIONARY POROUS PACKED BEDS, THE IMPROVEMENT WHICH COMPRISES, EXTRACTING A PORTION OF THE SOLUBLE CONSTITUENTS FROM THE FRESHLY CHARGED SOLID PARTICLES IN THE LAST STAGE OF THE MULTI-STAGE SYSTEM AT OPENING CONDITIONS WHICH CAUSE A TEMPERATURE GRADIENT INCREASING THE DIRECTION OF FLOW OF THE EXTRACTING FLUID TO CAUSE THE EXTRACTING FLUID, CONTAINING SOLUTE EXTRACTED FROM SOLID PARTICLES IN PRIOR STAGES,TO DE CREASE IN VISCOSITY AS SAID EXTRACTING FLUID PASSES THROUGH THE FRESHLY CHARGED STATIONARY PORUS PACKED BED OF SOLID PARTICLES AND SOLUBILIZES A PORTION OF THE SOLUBLE CONSTITUENTS THEREIN OPPOSITE DIRECTION OF ROTATION SAID JUNCTION BOX BEING THEREBY SECURABLE TO A STRUCTURAL MEMBER AGAINST ROTATIONAL, AXIAL, RADIAL AND TRANSVERSE MOVEMENT BY A SINGLE FASTENING NAIL.
Claim 2
Dependent Claim
131 words
IN A MULTI-STAGE BATCH-CONTERCURRENT METHOD OF SOLVENT EXTRACTION OF SOLUBLE CONSTITUENTS FROM SOLID PARTICLES COMPACTED INTO STATIONARY POROUS PACKED BEDS, THE IMPROVEMENT WHICH COMPRISES, EXTRACTING A PORTION OF THE SOLUBLE CONSTITUENTS FROM THE FRESHLY CHARGED SOLID PARTICLES IN THE LAST STAGE OF THE MULTI-STAGE SYSTEM AT OPENING CONDITIONS WHICH CAUSE A TEMPERATURE GRADIENT INCREASING THE DIRECTION OF FLOW OF THE EXTRACTING FLUID TO CAUSE THE EXTRACTING FLUID, CONTAINING SOLUTE EXTRACTED FROM SOLID PARTICLES IN PRIOR STAGES,TO DE CREASE IN VISCOSITY AS SAID EXTRACTING FLUID PASSES THROUGH THE FRESHLY CHARGED STATIONARY PORUS PACKED BED OF SOLID PARTICLES AND SOLUBILIZES A PORTION OF THE SOLUBLE CONSTITUENTS THEREIN OPPOSITE DIRECTION OF ROTATION SAID JUNCTION BOX BEING THEREBY SECURABLE TO A STRUCTURAL MEMBER AGAINST ROTATIONAL, AXIAL, RADIAL AND TRANSVERSE MOVEMENT BY A SINGLE FASTENING NAIL.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the passage of the extracting fluid is downward through the freshly charged stationary porous packed bed of solid particles.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the passage of the extracting fluid is upward through the freshly charged stationary porous packed bed of solid particles.
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the solid particles are particles of roast and ground coffee.
Claim 6
Dependent Claim
23 words
The method of claim 4 wherein the solid particles of roast and ground coffee have a mean particle size of about 1 millimeter.
Claim 7
Dependent Claim
122 words
In a continuous countercurrent method of solvent extraction of soluble constituents from freshly charged solid particles compressed into a porous bed, said bed moving countercurrent to the flow of solute-containing solvent through it, the improvement which comprises, establishing a temperature gradient throughout the depth of the packed bed by supplying solute-extractable solid particles continuously to the bed at a higher temperature than that of the solute-containing solvent such that the temperature of the solvent entering the porous bed is less than the temperature of the solute enriched solvent leaving the porous bed, whereby the viscosity of the solute-containing solvent within the interstices of the porous bed of solid particles decreases in the direction of increasing concentration of the solute in the solvent.
Claim 8
Dependent Claim
122 words
In a continuous countercurrent method of solvent extraction of soluble constituents from freshly charged solid particles compressed into a porous bed, said bed moving countercurrent to the flow of solute-containing solvent through it, the improvement which comprises, establishing a temperature gradient throughout the depth of the packed bed by supplying solute-extractable solid particles continuously to the bed at a higher temperature than that of the solute-containing solvent such that the temperature of the solvent entering the porous bed is less than the temperature of the solute enriched solvent leaving the porous bed, whereby the viscosity of the solute-containing solvent within the interstices of the porous bed of solid particles decreases in the direction of increasing concentration of the solute in the solvent.
Claim 9
Dependent Claim
22 words
The method of claim 6 wherein the passage of the solute-containing solvent is downward through the upward moving bed of solid particles.
Claim 10
Dependent Claim
25 words
The method of claim 6 wherein the solid particles are particles of roast and ground coffee having a mean particle size of about 1 millimeter.
References Cited (Backward Citations)
US2236059A
Cited
US2587556A
Cited
US2515730A
Cited
US2713009A
Cited
US2915399A
Cited
US3148069A
Cited
US3369874A
Cited
US3655398A
Cited
US3720518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |