Abstract:
Stable, silicate-free, soft metal safe, alkaline cleaners are provided. The cleaners comprise calcium ions and surfactants containing hydroxyl and/or carboxylic acid groups or a combination thereof, wherein the total of the two functionalities in each surfactant is greater than or equal to 2, and alpha-hydroxy carboxylic acids. It has been surprisingly discovered that alpha-hydroxy carboxylic acids such as tartaric acid, are capable of keeping calcium ions in an alkali solution. The cleaners may also comprise non-ionic surfactants to provide wetting, detergency, and foamability where required, anionic surfactants as viscosity enhancers in the case of high retention cleaners, and solvents such as alcohols, glycol ethers, or hydrotropes to enhance solubility of the system. The alkaline cleaners are safe to use on soft metal surfaces and equipment commonly found in many industries, without the presence of silicate which is normally used as a corrosion inhibitor.
Abstract:
Water in a process water system, such as a cooling tower or pulp and paper processing plant, is treated to destroy biological microorganisms by diverting the portion of the water flowing through the system to a side stream. In the side stream, chemicals are added such as halide ions or sodium chlorite. The water is then passed through an electrolysis unit or a UV radiation unit to oxidize the precursor to form an active oxidant. Advantageously, the pH of the side stream can be lowered to significantly improve the oxidization of the halide ions. When a very small portion of the flow rate is passing through the side stream, the acid added does not significantly alter the pH of the entire system. In a preferred embodiment, the acid added is phosphonic acid which acts as an antiscalant. Also included in the present invention is a method to inject oxidant precursors into a process water system through an oxidant generation station.
Abstract:
An apparatus (12) for dispensing solid (18) or semi-solid detergents includes a hollow elongated opening or chute (16) and an arcuate plate (28) that extends from the side wall of the apparatus to beneath the chute. This plate provides a planar support (17) for a detergent bar (18) placed within the chute. Water (22) is sprayed down the arcuate plate (28) and projects against the detergent (18) supported on the planar support (17) causing it to dissolve and flow down a drain (23). The chute has a unique geometric design which is suitable to receive only one uniquely shaped elongated detergent bar. In a kitchen having several detergent dispensers, each detergent dispenser will have a uniquely defined chute so that only the appropriate detergent can be used in the appropriate dispenser.
Abstract:
A disinfectant composition which is compatible with foodstuffs and beverages, said composition comprising: (a) an anionic surfactant chosen from an alkali metal salt of a C10-C18 alkyl sulphate and an alkal metal salt of di(C6-C10 alkyl) sulphosuccinate; (b) an acid selected from citric acid, phosphoric acid, sulphuric acid, hydrochloric acid, acetic acid, gluconic acid, lactic acid, propionic acid, malic acid and tartaric acid; and (c) a non-ionic surfactant which comprises a polyethoxylated sorbitan ester which is readily soluble in water.
Abstract:
Alkaline diamine track lubricants for use with glass, aluminum and two-piece PET containers and other articles of manufacture are prepared from an admixture of an alkyl diamine and a water-soluble hydrotrope. The diamine lubricants are prepared without the neutralization thereof and have a corrosion inhibitor which is, preferably, a reducing agent and a biocide incorporated therein to. A source of alkalinity may be employed, as well, to maintain the pH above 8.
Abstract:
A dispenser for powdered, granular, pellet, briquette or tablet-like material is provided. The dispenser comprises a dispenser head through which the material dissolved in water can be dispensed. A spray device is provided at the head to spray water onto the material provided in the dispenser head. A suspension device is provided to suspend a bag containing the material above the dispenser head. The bag in its suspended orientation has a fastener along its bottom end which closes the bottom end of the bag. The fastener is not, however, releasable until after the bag is mounted in the dispenser. Then the fastener is releasable to allow the contents thereof to fall by gravity onto the dispensing head. The dispenser provides a system, which normally avoids contact of the toxic contents of the bag with the user. At the same time, the only waste is in the form of a bag which may be made of recyclable plastic hence minimizing waste associated with the system.
Abstract:
A method and portable test kit for determining polyphosphate or phosphonate concentration in an aqueous sample. The polyphosphate or phosphonate is treated with an enzyme, particularly a phosphatase, to yield orthophosphate. The concentration of orthophosphate is determined using known methods. The concentration of polyphosphate or phosphonate in the aqueous sample can then be determined. The invention is particularly useful in the water treatment industry and in water treatment systems.
Abstract:
A concentrate is provided which upon dilution with water forms a biocidal lubricant composition for use in lubricating conveyor track. The concentrate comprises the following components: (a) a phosphate ester of general formula (I) in which n is in the range of from 0 to 10 and R1 is a C12 to C20 saturated or unsaturated alkyl group or a mixture of such alkyl groups; (b) an aromatic biocidal quaternary ammonium compound; and (c) an amount of base sufficient to give the concentrate a pH of from 5 to 10.
Abstract:
A lubricant composition having biocidal properties comprises a cyclic imidazoline as the active lubricant in combination with sufficient acid to render the imidazoline soluble in water and optionally including amides and nonionic surfactants. The concentrate, when diluted for use, provides biocidal control action against yeasts and bacteria. The concentrate is preferably adjusted to a pH in the range of 3 to 8.
Abstract:
Alkaline lubricants for use with glass, aluminum and PET containers and other articles of manufacture are prepared from water-soluble amines. Fatty acid lubricants prepared herefrom are rendered highly dilutable by employing myristic acid as at least a portion of the fatty acid component thereof. Synthetic diamine lubricants are prepared by using the water soluble amines as the hydrotrope for the synthetic diamine, without the neutralization thereof.