US3988010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the continuous agglomeration of aqueous latices
Assignee: Monsanto Co
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Filing: 1975-02-20
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Granted: 1976-10-26
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Expires: 1995-02-20
Abstract
Abstract There is disclosed an apparatus for the continuous agglomeration of aqueous latices to provide large particles comprising a mixing zone for forming an admixture of an agglomerating solution and a latex having mixing means and a perforated member as one wall section providing a flowthrough port for the admixture inducing laminar-flow in the admixture, an annular conduit to carry the admixture during agglomeration, a low-shear zone to carry and stabilize the agglomerated admixture and a withdrawal means having at least one diameter reduction to flow-mix the stabilized agglomerated admixture during withdrawal.
Inventors
- 👤 Mark D. Paster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:07
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/02; C08C1/065
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
199 words
An apparatus for continuously agglomerating particles in an aqueous latex comprising in combination: A. a mixing zone, being a continuous stirred tank having a first feed port for an agglomerating solution stream, a second feed port for a latex stream, a mixing means located in said tank to mix said feed streams forming an admixture, a perforated member, forming at least a portion of a wall section of said tank, said member providing a flow-through port for said admixture inducing laminar-flow in said admixture, B. an annular conduit to carry continuously said laminar-flowing admixture having a first orifice coinciding and interconnected with said perforated member and a second orifice in an opposite end of said conduit, C. a low-shear zone being a continuous flow-through chamber having a first inlet port in one end of said chamber interconnected with said second orifice of said conduit to carry an agglomerated admixture, at least one additional inlet port located in an opposite end of said chamber for feeding an emulsifying material to stabilize said agglomerated mixture and an outlet port in said opposite end, D. a continuous withdrawal means, interconnected with said outlet port of said chamber, for said stabilized agglomerated admixture.
Claim 2
Independent Claim
199 words
An apparatus for continuously agglomerating particles in an aqueous latex comprising in combination: A. a mixing zone, being a continuous stirred tank having a first feed port for an agglomerating solution stream, a second feed port for a latex stream, a mixing means located in said tank to mix said feed streams forming an admixture, a perforated member, forming at least a portion of a wall section of said tank, said member providing a flow-through port for said admixture inducing laminar-flow in said admixture, B. an annular conduit to carry continuously said laminar-flowing admixture having a first orifice coinciding and interconnected with said perforated member and a second orifice in an opposite end of said conduit, C. a low-shear zone being a continuous flow-through chamber having a first inlet port in one end of said chamber interconnected with said second orifice of said conduit to carry an agglomerated admixture, at least one additional inlet port located in an opposite end of said chamber for feeding an emulsifying material to stabilize said agglomerated mixture and an outlet port in said opposite end, D. a continuous withdrawal means, interconnected with said outlet port of said chamber, for said stabilized agglomerated admixture.
Claim 3
Dependent Claim
57 words
An apparatus of claim 1, wherein said low-shear zone is a flow-through chamber for said agglomerated admixture, oriented generally horizontally, said chamber having a bottom-wall section integral with said first inlet port and said outlet port, upwardly extending side-wall sections such that the depth of said chamber is at least about twice the diameter of said conduit.
Claim 4
Dependent Claim
28 words
An apparatus of claim 1, wherein said withdrawal means, is an annular pipe having at least one diameter reduction providing a flow-mixing zone for said stabilized agglomerated admixture.
Claim 5
Dependent Claim
18 words
An apparatus of claim 3, wherein said pipe has at least one inlet port for said emulsifying material.
Claim 6
Dependent Claim
45 words
An apparatus of claim 1, wherein said mixing zone is a cylindrical stirred tank having said first and second feed ports located in the opposite wall section of said tank, said mixing means being a high-flow agitator located generally in the center of said tank.
Claim 7
Dependent Claim
12 words
An apparatus of claim 5, wherein said agitator is a turbine agitator.
Claim 8
Dependent Claim
12 words
An apparatus of claim 5, wherein said agitator is a propeller agitator.
Claim 9
Dependent Claim
18 words
An apparatus of claim 5, wherein said agitator is a multi-paddle agitator having wall baffles positioned between paddles.
Claim 10
Dependent Claim
20 words
An apparatus of claim 5, wherein said stirred tank has a diameter about equal to the diameter of said conduit.
Claim 11
Dependent Claim
28 words
An apparatus of claim 5, wherein said stirred tank has a turnover value having a range of from about 3 to 10 per residence time of said admixture.
Claim 12
Dependent Claim
19 words
An apparatus of claim 5, wherein said tank has a length to diameter ratio of about 0.3 to 2.
Claim 13
Dependent Claim
25 words
An apparatus of claim 5, wherein said perforated member is a perforated cylindrical plate having a diameter about equal to the diameter of the conduit.
Claim 14
Dependent Claim
20 words
An apparatus of claim 5, wherein said conduit has a length to diameter ratio of from about 10 to 36.
Claim 15
Dependent Claim
13 words
An apparatus of claim 13, wherein said conduit has a temperature control means.
Claim 16
Dependent Claim
14 words
An apparatus of claim 14, wherein said temperature control means is a heat-exchange jacket.
Claim 17
Dependent Claim
30 words
An apparatus of claim 5, wherein said agitator has at least one wiping blade in contact wiht said perforated member for cleaning said perforated member during operation of said process.
Claim 18
Dependent Claim
38 words
An apparatus of claim 5, wherein said agitator has at least one wiping blade positioned with a clearance of less than about 0.25 inch from said perforated member for cleaning said perforated member during operation of said process.
Claim 19
Dependent Claim
25 words
An apparatus of claim 1, having a liquid level control means interconnected with said withdrawal means to control the liquid level in said low-shear zone.
Claim 20
Dependent Claim
88 words
An apparatus of claim 18, wherein said control means is a manometer-like piping arrangement comprising a first pipe means interconnected with said withdrawal means, adapted during operation of said apparatus, to accommodate the flow rate of said stabilized agglomerated admixture from said withdrawal means and a second pipe means interconnected with said first pipe means extending in a generally vertical direction, adapted during operation of said apparatus, to develop and maintain a head of fluid pressure sufficient to create a controlled fluid level in said low shear zone.
Claim 21
Dependent Claim
50 words
An apparatus of claim 1, wherein said conduit has a volume that provides a passage-time in said conduit, during the operation of said apparatus, sufficient to agglomerate said particles in said latex to a controlled and predetermined particle size, said conduit being upwardly inclined to carry said laminar flowing admixture.
Claim 22
Dependent Claim
38 words
An apparatus of claim 1, wherein a first feed means is interconnected to said first feed port to feed said agglomerating solution and a second feed means is interconnected with said second feed port to feed said latex.
Claim 23
Dependent Claim
14 words
An apparatus of claim 21, wherein said first and second feed means are pumps.
Claim 24
Dependent Claim
16 words
An apparatus of claim 21, wherein said first and second feed means are gravity feed systems.
Claim 25
Dependent Claim
16 words
An apparatus of claim 21, wherein said first and second feed means are gas-pressure feed systems.
Claim 26
Dependent Claim
71 words
An apparatus of claim 1, wherein said perforated member is a perforated cylindrical plate having at least about 6 perforations, provides a pressure drop not less than about the highest pressure-gradient in said mixing zone, said perforations having a length to diameter ratio ranging from about 0.1 to 4 and wherein the total free-area of said perforations is from about 1 to 10% of the total area of said perforated member.
Claim 27
Dependent Claim
30 words
An apparatus of claim 1, wherein said conduit is oriented in substantially a vertical position such that said laminar-flowing admixture flows vertically in said conduit during operation of said apparatus.
Claim 28
Dependent Claim
30 words
An apparatus of claim 1, wherein said conduit is oriented in substantially a horizontally position such that said laminar-flowing admixture flows horizontally in said conduit during operation of said apparatus.
Claim 29
Dependent Claim
27 words
An apparatus of claim 1, wherein said conduit is oriented downwardly such that said laminar-flowing admixture flows downwardly in said conduit during the operation of said apparatus.
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) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |