Abstract: The present invention provides calcium hypochlorite compositions that dissolve in approximately one week, while displaying both favorable reactivity properties and dissolution characteristics for recreation water treatment. The present invention benefits from the discovery that the dissolution profile of calcium hypochlorite compositions can be altered by providing compositions within a critical density range, for example when provided in the form of a tablet.

Abstract: The present invention is directed to a water treatment composition, comprising: calcium hypochlorite coated with a coating comprising at least one hydrated or anhydrous salt. The present invention is also directed to a water treatment composition, comprising: (a) an inner core layer comprising calcium hypochlorite; (b) one or more interlayers of selected salts positioned on top of said inner core layer, and (c) one or more outer layers of selected salts positioned on top of said interlayer(s).

Abstract: The present invention relates to compositions to stabilize hydrocarbon fuel, over a range of alcohol and water concentrations, against phase separation, containing a blend of two or more wide or one or more wide and one or more tall gaint hydrophobe nonionic surfactants. It also relates to fuel compositions stable toward such phase separation, which include (a) a major portion of a hydrocarbon fuel; (b) a minor amount of a low-alkyl (C1-C3) alcohol; (c) a minor portion of water; and (d) a minor portion of a stabilizer comprising a blend of wide or wide and tall giant hydrphobe nonionic surfactants. Optionally, the fuel compositions also include (e) a minor amount of a combustion aid, such as a cetane improver and (f) a minor amount of a solvent, such as a water solubilizing higher (C4 to C16) alcohol.

Abstract: The present invention relates to a tabletted water sanitizer having improved stability and controlled solubility is disclosed and method of making the same. The tabletted sanitizer is preferably comprised of calcium hypochlorite and a dissolving rate controlling amount of poly(maleic acid) salt. Preferably, the calcium hypochlorite has at least 60% available chlorine, and most preferably at least 70% available chlorine. The tablet (or briquette) has between about 0.001% and 20% of the poly(maleic acid) salt, preferably sodium poly(maleic acid), calcium poly(maleic acid) or mixtures thereof. Tablets may be formed using any tabletting or briquetting technique commonly known in the art.

Abstract: A method of controlling objectionable odors in and around aqueous systems is disclosed. The method comprises adding to the aqueous system or spraying into the atmosphere adjacent to the aqueous system an odor control treatment comprising an organic halogen donor species. Typical organic halogen donor species include halogenated succinimides, halogenated hydantoins, halogenated isothiazolines and mixtures thereof.

Abstract: Disclosed are methods for reducing turbidity of aqueous systems and clarifying wastewater systems utilizing a graft copolymer having the structure: ##STR1## whereby the cationic monomer (F) is represented by ##STR2## wherein R is hydrogen or a C.sub.1 to C.sub.3 alkyl group, R.sub.1 is the salt of an ammonium cation, and the molar percentage of a:b is from about 95:5 to about 5:95, with the proviso that the sum of a and b equals 100%.

Abstract: A contaminant precipitating composition and method are disclosed. The composition comprises a water soluble, branched, polydithiocarbamic acid salt effective for the purpose of precipitating contaminants from an aqueous solution. The method comprises adding an amount of the composition effective for the purpose to the aqueous solution so as to complex, precipitate and remove contaminants from the aqueous solution.

Abstract: A contaminant precipitating composition and method are disclosed. The composition comprises a water soluble branched polymeric composition effective for the purpose of precipitating contaminants from an aqueous solution. The method comprises adding an amount of the composition, effective for the purpose, to the aqueous solution so as to complex, precipitate and remove contaminants from the aqueous solution.

Abstract: Disclosed are methods for reducing turbidity of aqueous systems and clarifying wastewater systems utilizing a graft copolymer having the structure: ##STR1## whereby the cationic monomer (F) is represented by ##STR2## wherein R is hydrogen or a C.sub.1 to C.sub.3 alkyl group, R.sub.1 is the salt of an ammonium cation, and the molar percentage of a:b is from about 95:5 to about 5:95, with the proviso that the sum of a and b equals 100%.

Abstract: A contaminant precipitating composition and method are disclosed. The composition comprises a water soluble branched polymeric composition effective for the purpose of precipitating contaminants from an aqueous solution. The method comprises adding an amount of the composition, effective for the purpose, to the aqueous solution so as to complex, precipitate and remove contaminants from the aqueous solution.

Abstract: A contaminant precipitating composition and method are disclosed. The composition comprises a water soluble, branched, polydithiocarbamic acid salt effective for the purpose of precipitating contaminants from an aqueous solution. The method comprises adding an amount of the composition effective for the purpose to the aqueous solution so as to complex, precipitate and remove contaminants from the aqueous solution.

Abstract: Methods are disclosed for removing oil and metal ions from oily wastewaters. Polymeric tannin amine compounds are added to the oily wastewater to demulsify the oil, and flocculate the metal ions.