US3941739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowable flocculants for water treatment
Assignee: JBS USA LLC
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Filing: 1974-05-20
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Granted: 1976-03-02
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Expires: 1994-05-20
Abstract
Abstract A fluidized flocculant being a dispersion of from about 5 to 60 weight percent of finely ground polyacrylamides in a fluid, water soluble polyhydric alcohol carrier. The fluidized flocculant is prepared as a dispersion having a particle size of less than 75 microns and can be metered and pumped into a water stream and mixed therewith to form a flocculant solution that can be readily metered and pumped into water to be clarified.
Inventors
- 👤 Jack R. Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:50
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; C08J3/095; C02; C02F; C02F1/00; C02F1/52; C02F1/5227; C02F1/54; C08K; C08K5/00; C08K5/04; C08K5/06; C08J2333/00; C08J2333/24; C08J2333/26
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
63 words
A fluidized flocculant for use in an aqueous system comprising a dispersion of a finely ground polyacrylamide flocculating agent in a polyhydric alcohol carrier having an approximate molecular weight greater than 65 and less than 500 said dispersion being flowable at room temperature, the concentration of said flocculating agent in the dispersion being substantially greater than the concentration dissolvable in the aqueous system.
Claim 2
Dependent Claim
63 words
A fluidized flocculant for use in an aqueous system comprising a dispersion of a finely ground polyacrylamide flocculating agent in a polyhydric alcohol carrier having an approximate molecular weight greater than 65 and less than 500 said dispersion being flowable at room temperature, the concentration of said flocculating agent in the dispersion being substantially greater than the concentration dissolvable in the aqueous system.
Claim 3
Dependent Claim
30 words
The fluidized flocculant of claim 1, wherein the amount of said flocculating agent is within the approximate range of from 5 to 60 percent by weight of the total dispersion.
Claim 4
Dependent Claim
26 words
The fluidized flocculant of claim 1, wherein the carrier is a polyhydric alcohol selected from the group consisting of dipropylene glycol, propylene glycol, and diethylene glycol.
Claim 5
Dependent Claim
29 words
The fluidized flocculant of claim 1, said dispersion further including about 0.1 to about 20% by weight of a thickening agent soluble both in water and in said carrier.
Claim 6
Dependent Claim
22 words
The fluidized flocculant of claim 4, wherein the thickening agent is about 0.5 to about 10% by weight of the total dispersion.
Claim 7
Dependent Claim
25 words
The fluidized flocculant of claim 1, wherein the amount of said flocculating agent is from about 30 to 40% by weight of the total dispersion.
Claim 8
Independent Claim
63 words
A method of producing a fluidized flocculant, comprising steps of: mixing from about 5 to 60 weight percent, based upon the total composition, of polyacrylamides together with a polyhydric alcohol carrier having an approximate molecular weight greater than 65 and less than 500 to form a slurry, and milling said slurry to a particle size of approximately 75 microns to form a dispersion.
Claim 9
Independent Claim
63 words
A method of producing a fluidized flocculant, comprising steps of: mixing from about 5 to 60 weight percent, based upon the total composition, of polyacrylamides together with a polyhydric alcohol carrier having an approximate molecular weight greater than 65 and less than 500 to form a slurry, and milling said slurry to a particle size of approximately 75 microns to form a dispersion.
Claim 10
Dependent Claim
21 words
The method of claim 7, wherein the amount of polyacrylamides in the mixing step is from 30 to 40 weight percent.
Claim 11
Dependent Claim
30 words
The method of claim 7, further comprising mixing into the dispersion from about 0.1 to 20 weight percent of a thickening agent soluble in both water and in said carrier.
Claim 12
Independent Claim
56 words
A method of producing a fluidized flocculant comprising the steps of: grinding polyacrylamides to a particle size of approximately 75 microns, and mixing from about 5 to 60 weight percent of the ground polyacrylamides with a polyhydric alcohol carrier having an approximate molecular weight greater than 65 and less than 500 to form a flowable dispersion.
Claim 13
Independent Claim
56 words
A method of producing a fluidized flocculant comprising the steps of: grinding polyacrylamides to a particle size of approximately 75 microns, and mixing from about 5 to 60 weight percent of the ground polyacrylamides with a polyhydric alcohol carrier having an approximate molecular weight greater than 65 and less than 500 to form a flowable dispersion.
Claim 14
Dependent Claim
21 words
The fluidized flocculant of claim 1, wherein said finely ground polyacrylamide flocculating agent has a particle size of approximately 75 microns.
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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |