US4110208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clarification process
Assignee: Georgia-Pacific LLC
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Filing: 1977-06-24
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Granted: 1978-08-29
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Expires: 1997-06-24
Abstract
Abstract A process is described for clarification of an aqueous liquid by imparting magnetic characteristics to flocculated particles by addition of a ferromagnetic organic composition to the liquid to associate the ferromagnetic composition with the flocculated particles.
Inventors
- 👤 John A. Neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:02
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/48; C02F1/488; B; B03; B03C; B03C1/00; B03C1/005; B03C1/01
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
A flocculating agent for flocculation of finely dispersed particles in an aqueous medium comprising mixture of a water-soluble salt of aluminum, or iron, or mixture thereof with a ferromagnetic organic composition selected from the group consisting essentially of ferromagnetic lignosulfonate, ferromagnetic sulfonated tannin, and ferromagnetic sulfonated phenol condensed with an aldehyde, said ferromagnetic organic composition being present in the mixture in an amount such that the metal content of the ferromagnetic organic composition is in the range of from 0.5 to 20% of the metal content of the water-soluble salt.
Claim 2
Dependent Claim
90 words
A flocculating agent for flocculation of finely dispersed particles in an aqueous medium comprising mixture of a water-soluble salt of aluminum, or iron, or mixture thereof with a ferromagnetic organic composition selected from the group consisting essentially of ferromagnetic lignosulfonate, ferromagnetic sulfonated tannin, and ferromagnetic sulfonated phenol condensed with an aldehyde, said ferromagnetic organic composition being present in the mixture in an amount such that the metal content of the ferromagnetic organic composition is in the range of from 0.5 to 20% of the metal content of the water-soluble salt.
Claim 3
Dependent Claim
16 words
A flocculating agent according to claim 1 wherein the ferromagnetic organic composition is a ferromagnetic lignosulfonate.
Claim 4
Dependent Claim
20 words
A flocculating agent according to claim 2 wherein the ferromagnetic lignosulfonate contains from 18 to 30% by weight of iron.
Claim 5
Dependent Claim
17 words
A flocculating agent according to claim 1 wherein the ferromagnetic organic composition is a ferromagnetic sulfonated tannin.
Claim 6
Dependent Claim
21 words
A flocculating agent according to claim 1 wherein the ferromagnetic organic composition is a ferromagnetic sulfonated phenol condensed with an aldehyde.
Claim 7
Dependent Claim
52 words
A magnetic floc comprising a metal hydroxide selected from the group consisting essentially of iron hydroxide, aluminum hydroxide, and mixtures thereof associated with a ferromagnetic lignosulfonate in an amount of the ferromagnetic lignosulfonate being sufficient to impart magnetization to the hydroxide to be attracted to a magnetic field of a magnetic filter.
Claim 8
Dependent Claim
52 words
A magnetic floc comprising a metal hydroxide selected from the group consisting essentially of iron hydroxide, aluminum hydroxide, and mixtures thereof associated with a ferromagnetic lignosulfonate in an amount of the ferromagnetic lignosulfonate being sufficient to impart magnetization to the hydroxide to be attracted to a magnetic field of a magnetic filter.
Claim 9
Dependent Claim
40 words
A composition according to claim 6 wherein the metal hydroxide is associated with the ferromagnetic lignosulfonate in an amount such that the metal content of the ferromagnetic lignosulfonate is from 0.5 to 20% of the metal content of the hydroxide.
Claim 10
Dependent Claim
18 words
A composition according to claim 7 wherein the ferromagnetic lignosulfonate contains from 18 to 30 weight percent iron.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |