DE2142742

1333275 Polymerizing acrylic salts DOW CHEMICALS CO 5 Aug 1971 36911/71 Heading C3P In the polymerization of acrylates or methacrylates of alkali metals or ammonium in aqueous solution there is added (a) sufficient alkali to give a pH of at least 10À7 up to a maximum of 15-1% dependent in inverse pr...

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Bibliographische Detailangaben
Hauptverfasser:	VOLK, HENRY, BAY CITY, MICH., US, HAMLIN, PERCY JAY, MIDLAND, MICH., US
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Zusammenfassung:	1333275 Polymerizing acrylic salts DOW CHEMICALS CO 5 Aug 1971 36911/71 Heading C3P In the polymerization of acrylates or methacrylates of alkali metals or ammonium in aqueous solution there is added (a) sufficient alkali to give a pH of at least 10À7 up to a maximum of 15-1% dependent in inverse proportion to the monomer concentration of 10-35% or (b) where the monomer is an ammonium salt, at least 0À1% of ammonium hydroxide based on the weight of solution, up to a maximum of 15-5% dependent in inverse proportion to the monomer concentration of 10-40%, the solution is purged of oxygen and polymerization is effected at 0-100 C. in the presence of an initiator. Preferably an alkali metal or ammonium salt is also added. The products are used as flocculants