Patent US834588A successfully refreshed from Google Patents.
Patent US3868320A successfully refreshed from Google Patents.
US3868320A
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Treatment of paper box plant effluents
Assignee: OI Glass Inc
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Filing: 1973-07-30
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Granted: 1975-02-25
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Expires: 1993-07-30
Abstract
Abstract Effluvial streams from paper box plants consisting primarily of flexographic ink wastes and starch wastes, which are presently treated separately, can be combined and treated as a single system. Thus, the starch effluent after mixing with the ink effluent can be flocculated more readily by treatment with multivalent metal compounds such as the alkaline earth oxides or salts such as alum or ferrous sulfate. The clarified, ink-starch effluent can then be recirculated if desired with a concomitant savings in chemical costs.
Inventors
- 👤 Shibley A Hider
- 👤 John K Rogers
- 👤 Colbert W Wilkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:57
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/919; Y10S210/928
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A METHOD OF CLARIFYING AN AQUEOUS, STARCH ADHESIVE EFFLUENT FROM A PAPER BOX PLANT WHICH COMPRISES COMBINING THEREWITH AN AQUEOUS FLEXOGRAPHIC INK EFFLUENT CONTAINING ABOUT 40-50 PERCENT BY WEIGHT MALEIC OR ACRYLIC VEHICLE, AND 15-40 PERCENT BY WEIGHT PIGMENT TO FORM A MIXTURE CONTAINING ABOUT 8-12 PARTS STARCH SOLIDS TO 1 PART INK SOLIDS, FLOCCULATING THE RESULTING MIXTURE WITH A MULTIVALENT METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE, CALCIUM HYDROXIDE, CALCIUM CHLORIDE, MAGNESIUM OXIDE, MAGNESIUM HYDROXIDE, ALUMINUM SULFATE OR FERROUS SULFATE, SAID COMPOUND ADDED IN A WEIGHT RATIO OF 0.1-1 PARTS COMPOUND TO 1 PART INK-STARCH SOLIDS AND SEPARATING THE FLOCCULATED SOLIDS THUS FORMED.
Claim 2
Independent Claim
107 words
A METHOD OF CLARIFYING AN AQUEOUS, STARCH ADHESIVE EFFLUENT FROM A PAPER BOX PLANT WHICH COMPRISES COMBINING THEREWITH AN AQUEOUS FLEXOGRAPHIC INK EFFLUENT CONTAINING ABOUT 40-50 PERCENT BY WEIGHT MALEIC OR ACRYLIC VEHICLE, AND 15-40 PERCENT BY WEIGHT PIGMENT TO FORM A MIXTURE CONTAINING ABOUT 8-12 PARTS STARCH SOLIDS TO 1 PART INK SOLIDS, FLOCCULATING THE RESULTING MIXTURE WITH A MULTIVALENT METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE, CALCIUM HYDROXIDE, CALCIUM CHLORIDE, MAGNESIUM OXIDE, MAGNESIUM HYDROXIDE, ALUMINUM SULFATE OR FERROUS SULFATE, SAID COMPOUND ADDED IN A WEIGHT RATIO OF 0.1-1 PARTS COMPOUND TO 1 PART INK-STARCH SOLIDS AND SEPARATING THE FLOCCULATED SOLIDS THUS FORMED.
Claim 3
Dependent Claim
29 words
A method as in claim 1 in which the metal compound is calcium hydroxide. 3. A method as in claim 1 in which the metal compound is calcium oxide.
Claim 4
Dependent Claim
14 words
A method as in claim 1 in which the metal compound is aluminum sulfate.
Claim 5
Dependent Claim
14 words
A method as in claim 1 in which the metal compound is ferrous sulfate.
Claim 6
Dependent Claim
16 words
A method as in claim 1 in which the flexographic ink has an acrylic polymer vehicle.
Claim 7
Dependent Claim
16 words
A method as in claim 1 in which the flexographic ink has a maleic polymer vehicle.
References Cited (Backward Citations)
US2264448A
Cited
US3142638A
Cited
US3354028A
Cited
US3262877A
Cited
US3575868A
Cited
US3677940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |