Abstract: A chemical feeder for producing a solution of dissolved chemical material that includes a hopper, a pump, a water supply line that extends from the pump, a chemical solution preparation unit that has a reservoir and a dissolution device and a dilution control device that are each connected to the water supply line. The dissolution device has a spray manifold to spray water towards the hopper that contains solid chemicals to contact and dissolve the chemical material. The dilution control device sprays water in a direction opposite the spray manifold and into the reservoir to aid in adjusting the concentration of a chemical solution and to arrive at a desired chemical concentration range. Thus, the dilution control device allows the chemical feeder to be used in a wide range of applications.

Abstract: An apparatus for preparing a chemical solution includes a lower housing and an upper housing. The lower housing has a base, an upper plate having a central opening, and a side wall. A grid mounted on the upper plate covers the opening. A wall within the lower housing divides the interior of the lower housing into a central inner chamber and an annular outer chamber; this wall extends into an upper portion of the lower housing. One portion of the wall has a reduced height to permit fluid flow from the inner chamber to the outer chamber. A nozzle is mounted in the inner chamber for discharging fluid into the inner chamber, and causes local elevation of a portion of the fluid surface above the grid. The nozzle may be an eductor creating a venturi effect to draw fluid into the eductor.

Abstract: The present invention provides a composition for treating recirculating or stagnant water. The composition contains a phosphorus-containing compound, which is metaphosphate compound, a polyphosphoric acid or a polyphosphate, and one or more zinc compounds. The phosphorus-containing compound is a compound which is not readily hydrolyzable to an orthophosphate. In another aspect of the present invention, provided is a method of controlling algae in a body of recirculating or stagnant water using the composition.

Abstract: A rapid rate chemical solution generator system and a method of generating a chemical solution from the system to rapidly treat a body of water. The system and method are especially useful in emergency situations. The system includes a tank for mixing chemical material with water, a hopper for storage of the chemical material, a gate valve disposed between the tank and hopper, a mixer to agitate and blend the chemical material with the water and form the chemical solution and a pump to aid in drawing the chemical solution out of the tank and toward a desired application. The system is configured to provide long-term storage of the chemical material in the hopper, while keeping the chemical material available for rapid delivery to the tank when needed.

Abstract: The present invention relates to treatment of water, and more specifically to treatment of water using a stable formulation of polyhexamethylene biguanide (PHMB) and a liquid or solid zinc salt for the application and prevention algae in recirculated and stagnant water systems. The invention also encompasses methods of treating water that already contains PHMB.

Abstract: The present invention is directed to a biocidal composition comprising a blend of one or more pyrithione compounds, and one or more pyrrole compounds of Formula I wherein said biocidal composition is copper free or low copper content.

Abstract: The present invention is directed to a water treatment composition, comprising: 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 55 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition. The present invention is also directed to a water treatment tablet, comprising 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 10 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition. Methods of treating recreational water using the compositions are also disclosed.

Abstract: An apparatus includes a reservoir for holding a chemical solution, a pump and a discharge nozzle. The pump has an inlet and an outlet connected to the reservoir by inlet and discharge lines. The nozzle is disposed in a lower portion of the reservoir and discharges the solution toward the bottom of the reservoir; the nozzle has an inlet port connected to the pump discharge line through the sidewall of the reservoir. The pump inlet line is connected to a sidewall of the reservoir at a location below a normal surface level of the solution, and the pump discharge line is connected to the sidewall of the reservoir above that location. The reservoir, pump, pump inlet line, pump discharge line, nozzle inlet line and nozzle form a closed loop recirculation system effective to suspend insoluble material in the chemical solution.

Abstract: The present invention relates to an antimicrobial composition comprising an isothiazolin-3-one, such as 1,2-benzisothiazolin-3-one, a zinc compound selected from zinc salts, zinc oxide, zinc hydroxide or combinations thereof, a pyrithione salt or pyrithione acid, and a surfactant selected from the group consisting of (i) an anionic surfactant having a sulfate or sulfonate moiety attached to a straight or branched chain containing from about 10 to about 18 atoms at the backbone of the chain, (ii) an anionic surfactant being an alkylaryl sulfonic acid or salt thereof wherein the alkyl portion contains from about 10 to about 18 carbon atoms, and the aryl portion contains a benzyl or substituted benzyl group, and combinations thereof. This composition is particularly effective in preventing the growth of various microorganisms in mineral slurries such as aqueous calcium carbonate slurries.

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 is directed to a composition for treating recirculating water systems, comprising: (1) a biocidal effective amount of a first nonoxidizing biocide comprising biguanide; and (2) a biocidal effective amount of a second nonoxidizing biocide comprising dibromonitrilopropionamide (DBNPA); wherein the composition is substantially free from oxidants. The present invention is also directed to a method of controlling the growth of microorganisms in recirculating water systems, comprising the step of treating the recirculating water systems with the above composition.

Abstract: The present invention is directed to a treatment composition for recreational water, comprising a high molecular weight water soluble resin composition made from long chain alkoxylated polymers or co-polymers that impart emollient properties to the recreational water, as well as articles of manufacture comprising packaging material and the treatment composition for recreational water contained within the packaging material. The present invention is also directed to methods for treating recreational water, and recreational water treated with the above treatment composition.

Abstract: The present invention is directed to an antimicrobial composition, comprising pyrithione or a pyrithione complex; and a zinc or copper or silver source selected from the group consisting of zinc or copper or silver salts, oxides, hydroxides, sulfates, chlorides, metals, and combinations thereof; wherein the weight ratio of the zinc or copper or silver source to the pyrithione or the pyrithione complex is in the range from about 1:300 to about 50:1, and wherein the antimicrobial composition has an enhanced biocidal effect against a variety of free-living microorganisms or biofilms. Also disclosed is a method of inhibiting the growth of free-living microorganisms or biofilm utilizing the above antimicrobial composition, as well as use of such antimicrobial compositions in various products including fuels, fluids, lubricants, coatings, adhesives, sealants, elastomers, soaps, cosmetics, plastic or woven or non-woven fibers, pharmaceuticals, and as preservatives for the above products.

Abstract: A biocidal composition is disclosed comprising composite particles, each of said composite particles containing a shell and a core, said core comprising a metal or a metal-containing compound wherein the metal is a moiety selected from the group consisting of zinc, copper, bismuth, silver, zirconium, and combinations thereof said shell comprising a pyrithione adduct comprising the reaction product of pyrithione with a portion of said core metal or metal compound. In one aspect, an anti-fouling composition is disclosed comprising (a) an anti-soft-fouling effective amount of copper pyrithione; and (b) an anti-hard-fouling effective amount of a copper-containing salt, or oxide or hydroxide thereof. The present invention also relates to a method of making an anti-fouling composition comprising particles of copper pyrithione and a copper-containing salt that is effective against hard-fouling and soft-fouling organisms.

Abstract: A biocidal composition is disclosed comprising composite particles, each of the composite particles containing a shell and a core, the core comprising a metal or a metal-containing compound wherein the metal is a moiety selected from the group consisting of zinc, copper, bismuth, silver, zirconium, and combinations thereof, the shell comprising a pyrithione adduct comprising the reaction product of pyrithione with a portion of the core metal or metal compound. In one aspect, an anti-fouling composition is disclosed comprising (a) an anti-soft-fouling effective amount of copper pyrithione; and (b) an anti-hard-fouling effective amount of a copper-containing salt, or oxide or hydroxide thereof. The present invention also relates to a method of making an antifouling composition comprising particles of copper pyrithione and a copper-containing salt that is effective against hard-fouling and soft-fouling organisms.

Abstract: The present invention is directed to a granular water treatment composition, comprising: 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 55 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition. The present invention is also directed to a water treatment tablet, comprising 35-95 wt % calcium hypochlorite; 1 to 50 wt % magnesium sulfate or a hydrate thereof; 0.1 to 10 wt % lime; and 0.1 to 10 wt % of a water soluble zinc salt or a hydrate thereof; wherein the weight percents are based on the total weight of the composition.

Abstract: The present invention is directed to a biocidal composition comprising a blend of one or more pyrithione compounds, and one or more pyrrole compounds of Formula I wherein said biocidal composition is copper free or low copper content.

Abstract: A composition having effective broad spectrum preservation activity comprising a mixture of caprylyl glycol or one or more analogs thereof, or mixtures thereof with a preservative selected from the group consisting of: (1) chloroxylenol and 2-phenoxyethanol, (2) chloroxylenol and chlorphenesin, (3) chlorphenesin and 2-phenoxyethanol, and (4) chloroxylenol, chlorphenesin and 2-phenoxyethanol.

Abstract: One aspect of the present invention is directed to a solid chemical tablet in a shape comprising an elongated cylindrical side surface and an elongated flat side surface or an elongated concave cut side surface. Another aspect of the present invention is directed to a solid chemical tablet comprising a blend of hydrated calcium hypochlorite with magnesium sulfate heptahydrate. This invention further relates to a solid chemical tablet comprising a blend of solid calcium hypochlorite, and one or more solid alkali metal phosphate.

Abstract: A composition for the treatment of a liquid, particularly a body of water, such as a swimming pool, spa, or the like. The composition includes calcium hypochlorite, a water soluble zinc salt for controlling algae, and sodium aluminate as an agglomerating agent that may safely be combined with said calcium hypochlorite and said zinc salt. A floating chemical dispenser for containing and dispensing chemicals to treat a body of water. The dispenser includes an upper end float, a container adapted to contain chemicals, the container removably joined with the upper end float, and a free end float joined with the container. The free end float is configured so that a central axis of the container and upper end float is not substantially orthogonal to a surface of the water.