Betz Laboratories, Inc.

Larry A Lyons

Dwight P Davis

Paul Swered

Wilson K Whitekettle

Stephen Robert Vasconcellos

Michael F Mohn

The present invention is directed to a method of detoxifying water containing a cationic surfactant based biocide. The method comprises adding to an aqueous stream including a biocide containing cationic surfactants a sufficient quantity of a combination including clay and a non surface active sulfonate such as a polymerized alkyl naphthalene sulfonate. The combination allows for a high solids detoxification treatment.

Detoxification agents for surfactant based biocides

A method of controlling the fouling potential of macroinvertebrates, such as mollusks in aqueous systems which comprises adding to the system an effective controlling amount of an alkylthioalkylamine or acid addition salt thereof.

Method for controlling macroinvertebrates utilizing decylthioethylamine

A method of controlling the fouling potential of macroinvertebrates, such as mollusks, in aqueous systems which comprises adding to the system an effective controlling amount of a water-soluble alkyl guanidine salt wherein the alkyl group has from about 8 to about 18 carbons.

Method for controlling macroinvertebrates

A method of controlling the fouling potential of macroinvertebrates, such as mollusks, in aqueous systems which comprises adding to the system an effective controlling amount of a water-soluble quaternary ammonium salt having the following structure: ##STR1## wherein R.sub.1 is an alkyl group having about 6 to 24 carbons; R.sub.2 is an alkyl, aryl or arylalkyl group having about 6 to 24 carbons; R.sub.3 and R.sub.4 are alkyl groups having about 1 to 4 carbons; and X is chloride, bromide, sulfate, bisulfate, nitrate or acetate. Preferably, the quaternary ammonium salt is water-soluble alkyl dimethyl benzyl ammonium chloride having an alkyl chain length from C.sub.6 to C.sub.24 and, most preferably, it has an alkyl distribution of about 40% C.sub.12, 50% C.sub.14 and 10% C.sub.16.

A method of controlling the fouling potential of mollusks in aqueous systems which comprises adding to the system an effective controlling amount of a nitrostyrene compound and an alkyl thiocyanate compound.

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Woodbury, NJ, United States of America

Larry A Lyons