Method of making a flocculant composition

Details Method of making a flocculant composition Method of making a flocculant composition

1978-02-14

1978-11-14

Lilling, Herbert J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

210 54, 260 296WQ, 526216, 526303, 526317, 526909, 260 342, C08K 506, C08K 501, C08J 302, C08F21800

Patent

active

041255089

ABSTRACT:
There is practiced a four-step procedure, according to which the acrylamide or the like and, if desired, other ingredients, is first polymerized in a water-in-oil emulsion where the oil phase consists of a hydrocarbon solvent in the presence of an appropriate quantity of suitable surfactant so as to produce particles of a desired size, then water is azeotropically removed, and then a suitable glycol or glycol ether is added, following which the hydrocarbon solvent used in the polymerization reaction is removed. This makes it possible to obtain a composition of matter which contains at least 10 weight percent of active flocculant ingredient, and more usually about 20 percent, suspended in a medium which is entirely water-soluble. Such flocculant compositions dissolve readily in water, yet they can be obtained, according to the method of the invention, in a manner considerably less expensive than any process which necessitates the grinding of a solid flocculant material into finely divided form.

REFERENCES:
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patent: 3666710 (1972-05-01), Makhlouf et al.
patent: 3691123 (1972-09-01), Clarke et al.
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patent: 3915920 (1975-10-01), Slovinsky
patent: 3925295 (1975-12-01), Osborn et al.
patent: 3935155 (1976-01-01), Osmond et al.
patent: 3981839 (1976-09-01), Asher et al.
patent: 3985700 (1976-10-01), Nicks et al.
patent: 4052353 (1977-10-01), Scanley

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