Treatment of aqueous compositions containing contaminants
OwnerGeorge Sutherlandinventor
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Abstract
The present invention provides for a method of producing a composition containing a polymer having undergone phase inversion, the method comprising the step of: effecting phase inversion of a phase invertible water insoluble polymer in an aqueous composition and the composition comprises a mixture of at least two different substances, one of which is a water insoluble dispersible polymer having undergone phase inversion while the other is optionally a contaminant.
Claims34
A method of producing a composition containing a polymer having undergone phase inversion, said method comprising the step of:
- effecting phase inversion of a phase invertible water insoluble polymer in an aqueous composition to produce at least one separable polymer-containing phase.
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A method of preparing an aqueous polymer dispersion with improved characteristics comprising the steps of:
- providing a first aqueous polymer dispersion in which the polymer is substantially water insoluble;
- adding a substance at a controlled pH and temperature sufficient to form a second aqueous polymer dispersion which is substantially water-insoluble and which is capable of phase inversion.
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A composition comprising a mixture of at least 2 different substances, one of which is a water insoluble dispersible polymer having undergone phase inversion.
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A stable aqueous dispersion composition containing multivalent metals of the formulation M1M2HP comprising:
- a substantially ionized ethylene-carboxylic acid copolymer P including ethylene-acrylic acid polymer of average molecular weight from about 4,000 to about 15,000 and associated cation mixture M1M2H;
- M1 being monovalent cations including ammonium and alkali metal, M2 being multivalent metal cations and H representing unionized carboxyl group;
- and
- where the ratio of equivalents of (M2 plus H) to equivalents of M1 is less than about 1:1.
Use of an aqueous polymer dispersion, the dispersion comprising a polymer which is substantially water-insoluble and which is capable of undergoing phase inversion, for removal of a contaminant from an aqueous mixture containing the contaminant.
Dependencies are inferred from the claim text.