US3559959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller and mixer-settler apparatus
Assignee: Monsanto Co
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Filing: 1968-08-13
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Granted: 1971-02-02
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Expires: 1988-08-13
Abstract
Abstract A variable ratio impeller apparatus in which vanes extend through perforations in a baffle which is movable to vary the proportion of the vanes extending on either side of the baffle permits adjusting the ratio of mixing action to pumping action produced by the impeller. In a mixer-settler liquid-liquid contact apparatus, the impeller apparatus is substantially vertically positioned in a mixing vessel with the vanes extending over and spaced not more than 0.05 times the diameter of their sweep from proximately located plural inlets communicating with the bottom of the mixing vessel. Means are provided for transferring liquid from the mixing vessel to a settling vessel provided with a baffle to minimize turbulance produced by the liquid transfer.
Inventors
- 👤 Walter M Davis
- 👤 Edwin A Matzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:40
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/2288; B; B01; B01F; B01F27/00; B01F27/05; B01F27/11; B01F27/115; B01F27/1152
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
A mixer-settler apparatus comprising in combination: a. a mixing vessel; b. a settling vessel; c. means for transfer of fluid from said mixing vessel to said settling vessel; d. at least 2 proximately located inlets communicating with the bottom of said mixing vessel; e. a variable ratio impeller apparatus comprising a perforated baffle, vanes extending through the perforations in said baffle, means for adjusting the relative position of said baffle and said vanes with respect to each other to vary the portion of said extending on either side of said baffle, and means for securing said baffle and said vanes in fixed position relative to each other, said apparatus being substantially vertically positioned in said mixing vessel, the vanes of said impeller apparatus extending over said inlets and being spaced therefrom by a distance less than 0.05 times the diameter of the sweep of said vanes; f. a baffle disposed in said settling vessel to minimize the turbulence produced in said settling vessel by transfer thereto of fluid from said mixing vessel; and g. means for withdrawing liquid from said settling vessel.
Claim 2
Dependent Claim
182 words
A mixer-settler apparatus comprising in combination: a. a mixing vessel; b. a settling vessel; c. means for transfer of fluid from said mixing vessel to said settling vessel; d. at least 2 proximately located inlets communicating with the bottom of said mixing vessel; e. a variable ratio impeller apparatus comprising a perforated baffle, vanes extending through the perforations in said baffle, means for adjusting the relative position of said baffle and said vanes with respect to each other to vary the portion of said extending on either side of said baffle, and means for securing said baffle and said vanes in fixed position relative to each other, said apparatus being substantially vertically positioned in said mixing vessel, the vanes of said impeller apparatus extending over said inlets and being spaced therefrom by a distance less than 0.05 times the diameter of the sweep of said vanes; f. a baffle disposed in said settling vessel to minimize the turbulence produced in said settling vessel by transfer thereto of fluid from said mixing vessel; and g. means for withdrawing liquid from said settling vessel.
Claim 3
Dependent Claim
11 words
The apparatus of claim 1 wherein said inlets are concentric conduits.
Claim 4
Dependent Claim
16 words
The apparatus of claim 2 wherein said baffle in said settling vessel defines a channel therein.
Claim 5
Dependent Claim
20 words
The apparatus of claim 1 further comprising insulation means having heating means disposed therein at least partially surrounding said vessels.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |