Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...
Patent
1983-04-15
1985-05-14
Hruskoci, Peter
Liquid purification or separation
Processes
Preventing, decreasing, or delaying precipitation,...
106308Q, 252180, 501148, C02F 510
Patent
active
045170983
ABSTRACT:
A method for dispersing inorganic materials in aqueous systems using water soluble, low molecular weight copolymers of acrylic acid is provided. Copolymers having a weight average molecular weight of from about 2,000 to about 5,000 formed from about 85 to about 97 weight percent acrylic acid and from about 3 to about 15 weight percent of a hydrophobic comonomer are provided for effective dispersion of suspended particulate matter, such as clay, and for inhibiting the precipitation of common hardness ion salts in aqueous systems. The most preferred copolymers have a weight average molecular weight of about 3,000 and are formed from about 95 weight percent acrylic acid and about 5 weight percent ethyl acrylate.
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Dupre Jean
Hann William M.
Natoli John
Adler Marc S.
Hruskoci Peter
Rohm and Haas Company
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