US3894946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating industrial wastes
Assignee: Wyeth Holdings LLC
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Filing: 1974-02-25
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Granted: 1975-07-15
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Expires: 1994-02-25
Abstract
Abstract Treatment of flocculatable industrial wastes with effective amounts of polyquaternary polymers obtained by interaction of secondary amine, a difunctional epoxy compound, and a polyfunctional amine provides improved processing of the wastes when the solution viscosity of the polyquaternary polymer is at least 100 centistokes when measured at 25*C. at a concentration of 37%, by weight, based on the cationic portion of the polyquaternary polymer.
Inventors
- 👤 Hans Peter Panzer
- 👤 Kenneth Wayne Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:19
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/0226; Y; Y10; Y10S; Y10S210/00; Y10S210/928
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
A PROCESS FOR FLOCCULATING FLOCCULATABLE INDUSTRIAL WASTES WHICH ARE IN THE FORM OF AQUEOUS DISPERSIONS HAVING NEGATIVE CHARGES WHICH PROCESS COMPRISES ADDING TO THE DISPERSION AN EFFECTIVE AMOUNT OF A WATER-DISPERSIBLE POLYQUATERNARY POLYMER COMPRISING THE REACTION PRODUCT OFDIMETHYLAMINE, A POLYFUNCTIONAL AMINE, AND A DIFUNCTIONAL EPOXY COMPOUND SELECTED FROM THE GROUP CONSISTING OFEPIHALOHYDRINS AND PRECURSORS FOR EPIHALOHYDRINS WHICH UNDER ALKALINE CONDITIONS ARE READILY CONVERTED INTO THE CORRESPONDING EPOXY COMPOUNDS, AND MIXTURES THEREOF, SAID POLYQUATERNARY POLYMER CONTAINING REPEATING UNITS OF THE STRUCTURES
Claim 2
Dependent Claim
80 words
A PROCESS FOR FLOCCULATING FLOCCULATABLE INDUSTRIAL WASTES WHICH ARE IN THE FORM OF AQUEOUS DISPERSIONS HAVING NEGATIVE CHARGES WHICH PROCESS COMPRISES ADDING TO THE DISPERSION AN EFFECTIVE AMOUNT OF A WATER-DISPERSIBLE POLYQUATERNARY POLYMER COMPRISING THE REACTION PRODUCT OFDIMETHYLAMINE, A POLYFUNCTIONAL AMINE, AND A DIFUNCTIONAL EPOXY COMPOUND SELECTED FROM THE GROUP CONSISTING OFEPIHALOHYDRINS AND PRECURSORS FOR EPIHALOHYDRINS WHICH UNDER ALKALINE CONDITIONS ARE READILY CONVERTED INTO THE CORRESPONDING EPOXY COMPOUNDS, AND MIXTURES THEREOF, SAID POLYQUATERNARY POLYMER CONTAINING REPEATING UNITS OF THE STRUCTURES
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the viscosity of said polyquaternary compound is at least 200 centistokes.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein the flocculatable industrial waste is an iron ore slime.
Claim 5
Dependent Claim
14 words
The process of claim 1 wherein the flocculatable industrial waste is a coal washing.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein the flocculatable industrial waste contains emulsified and suspended oil and suspended iron-containing solids.
Claim 7
Dependent Claim
18 words
The process of claim 1 wherein the flocculatable industrial waste is a waste water from a paper-making plant.
References Cited (Backward Citations)
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US3131144A
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US3240721A
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US3259570A
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US3493502A
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US3567659A
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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) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |