US4128528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clay-polymer concentrates for beneficiating clays
Assignee: ChampionX LLC
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Filing: 1977-08-01
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Granted: 1978-12-05
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Expires: 1997-08-01
Abstract
Abstract A method is disclosed for the preparation of concentrated, homogeneous, free flowing clay-polymer powders which upon addition to an aqueous solution may be inverted so as to produce a beneficiated clay.
Inventors
- 👤 Alvin J. Frisque
- 👤 Arthur R. McDermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:54
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/18; C08; C08K; C08K3/00; C08K3/34; C08K3/346; C08K3/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
A homogeneous clay-acrylamide polymer composition which comprises: A. a dry clay powder; and B. from 0.1 to 40% by weight based on the weight of (A) of a water-in-oil emulsion of a finely divided water soluble acrylamide polymer, said water-in-oil emulsion of a water soluble acrylamide polymer comprising: a. 30-95% of an aqueous phase consisting of water and water soluble acrylamide polymer having a particle size ranging between 2 millimicrons up to about 5 microns, b. 10-50% of the water soluble acrylamide polymer, said water soluble acrylamide polymer containing at least 5% by weight acrylamide and having a molecular weight in excess of one million, c. 5-70% of an organic hydrophobic liquid, d. 0.1-21% by weight of a water-in-oil emulsifying agent; said clay acrylamide polymer composition being characterized as being in the form of a homogeneous free-flowing powder to a damp powder and is prepared by adding (B) to (A).
Claim 2
Dependent Claim
150 words
A homogeneous clay-acrylamide polymer composition which comprises: A. a dry clay powder; and B. from 0.1 to 40% by weight based on the weight of (A) of a water-in-oil emulsion of a finely divided water soluble acrylamide polymer, said water-in-oil emulsion of a water soluble acrylamide polymer comprising: a. 30-95% of an aqueous phase consisting of water and water soluble acrylamide polymer having a particle size ranging between 2 millimicrons up to about 5 microns, b. 10-50% of the water soluble acrylamide polymer, said water soluble acrylamide polymer containing at least 5% by weight acrylamide and having a molecular weight in excess of one million, c. 5-70% of an organic hydrophobic liquid, d. 0.1-21% by weight of a water-in-oil emulsifying agent; said clay acrylamide polymer composition being characterized as being in the form of a homogeneous free-flowing powder to a damp powder and is prepared by adding (B) to (A).
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the clay is a sodium bentonite.
Claim 4
Dependent Claim
18 words
The composition of claim 1 wherein the water-soluble acrylamide polymer is a copolymer of acrylamide and acrylic acid.
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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |