Abstract: The present invention relates to processes for reducing or eliminating the amount of hydrazine from a hydroxylamine-free base containing hydrazine by treating said hydroxylamine-free base with a scavenger agent, and to the hydroxylamine-free base thereby obtained, as well as to its use for producing microdispersions containing a hydroxamated polymer for use as a flocculant in the Bayer process.

Abstract: A method of treating water in order to minimize scaling and biomass buildup in water conduits or containers in which the treated water is used includes pressurizing and optionally filtering ambient air, processing the pressurized ambient air in a chamber including at least one ultraviolet light source operated to generate an output flow mixture of pressurized air and reactive oxygen species (ROS) gas, mixing the pressurized ROS/gas output mixture to realize a flow of water/pressurized ROS gas/air mixture and outputting the flow of water/pressurized ROS gas/air mixture as the treated water process product. The process includes generating reactive oxygen species (ROS) gas in the pressurized ROS/gas output mixture including at least one of Super Oxide (O2?), Peroxide (—O2—), Hydro peroxide (HO2?), Hydroxyl Radicals (OH.), Ozone (O3?) and Molecular Oxygen (O2).

Abstract: Methods of producing microdispersions containing hydroxamated polymers by reacting water-in-oil microdispersions having vinyl polymers containing one or more pendant functional groups that react with hydroxylamine, with a hydroxylamine-free base substantially free of inorganic salt and containing less than 500 ppm hydrazine are disclosed herein, along with the microdispersions thereby obtained.

Abstract: A screw separator for separating solids out of suspensions, includes at least one housing and at least one feed pipe for the suspension, at least one discharge pipe for liquids, and at least one outlet for the at least partially dewatered solids wherein at least one strainer basket is provided in the housing in which a screw is rotatably mounted, and that the worm shaft of the screw terminates inside the housing and is continued by way of a separate pipe-like structure.

Abstract: The disclosure relates to a filtration device that comprises a disc with a rim covering and stiffening a plurality of filtration sectors connected to taps provided on the outer wall of a rotary main shaft containing inner discharge channels and fit-inserted into said taps and into a crown comprising two parts concentric to the shaft, one which is secured to the shaft while the other is removable, characterised in that said rim is provided with openings each intended for receiving a removable connection flange bearing, on the one hand, a radial strut clamped between two adjacent sectors for the relative clamping thereof and interacting, on the other hand, with a spring quick fastener for locking the strut under tension between the sectors. The disclosure also relates to a method for assembling and maintaining said filtration device.

Abstract: A hybrid chemical/mechanical water treatment plant and method employing rapid sulfur dioxide chemical disinfection and dewatering technology in conjunction with lime and oxidization/reduction agents to removal pharmaceuticals and personal care products from waters to meet operating constraints and environmental permitting restrictions and siting limitations for water treatment.

Abstract: A filter assembly comprises a filter housing (23) into which a filter element is insertable. A core element (38) is provided extending within the housing (23). The filter assembly comprises a coupling assembly (200) that is insertable into the housing (23), the coupling assembly (200) comprising a leaf spring (201) having a span larger than an internal diameter of the filter housing (23), such that when the leaf spring (201) is inserted into the filter housing (23) the outer edge of the leaf spring (201) engages an inner surface of the filter housing (23) and the leaf spring (201) bulges in the direction of insertion of the leaf spring into the housing, preventing removal of the leaf spring, in a direction opposite to the insertion direction, from the filter housing (23), the coupling assembly (200) comprising a connecting part for connecting the core element (38) to the coupling assembly (200).

Abstract: Provided is a method for treating sludge from the mining or mineral industry, including before above-ground spreading, contacting the sludge with a flocculating agent that is a water-soluble, organic polymer having a molecular weight of from 5,000,000 to 25,000,000 g/mol and an anionicity of from 10 to 40 mol %, to produce contacted sludge, wherein the water-soluble organic polymer includes at least one anionic monomer having a carboxylic function or having a sulfonic acid function, at least one non-ionic monomer, and optionally one or more cationic monomers, where the flocculating agent is branched, and has from 0.02 to 2 mol % hydrophobic monomers.

Abstract: A dual stage filter includes an outer filter with a first media and an inner filter with a second media. A barrier is between the first media and the second media. The barrier directs fluid flow between the first and second media. The barrier creates a flow path between the first and second media, such that a working fluid, which is desired to pass through the first and second media, is directed by the barrier and flows through the second media, and such that another fluid, which is not desired to pass through the second media, is directed by the barrier and separates from the working fluid. Using the barrier, the dual stage filter can employ either or both upward flow and downward flow to achieve efficient fluid separation, for example fuel water separation in an engine fuel filter.

Abstract: Clarification of surfactant laden wastewaters of the type commonly encountered in the laundry, dishwashing, textile manufacturing, and metal cleaning and degreasing processes is provided by use of a chitosan/(meth)acrylyloxy alkyl quaternary ammonium salt graft polymer.

Abstract: A method and chemical composition are provided which permit operation of evaporative cooling towers at increased cycles of concentration without formation of calcium scale. The method can include first determining the calcium hardness and total alkalinity of the makeup water, calculating the operating cycles of concentration using a formula developed for the specified chemical composition, then dosing the treated water to maintain a constant level of the chemical composition. The method permits scale-free operation of evaporative cooling towers at a minimum of two (2) cycles of concentration over existing technology.

Abstract: The present invention relates to methods for the separation of materials from heterogeneous fluids and provides a means of effecting stimulant-sensitive flocculation and consolidation of solid suspensions within a liquid medium. Specifically, the present invention provides a method of controlling the state of a suspension of solid particles in a liquid, including applying to the suspension a stimulus adapted to control inter-particle forces between the solid particles. The stimulus is reversibly operable to control attraction and/or repulsion. Means of consolidating a sediment bed and of separating the resultant liquids-rich and solids-rich phases are also within the ambit of the invention.

Abstract: A priming method for a filter, whereby the outlet of a spent filter is connected to the inlet of a fresh filter, and the spent filter is inverted. A drain in the spent filter is then opened to allow air to enter the spent filter and fluid to drain from the clean side of the spent filter into the fresh filter.

Abstract: With a method for removing slag, particularly slag that occurs during synthesis gas extraction, from a slag bath situated in a pressurized container, into a collection container for the slag, below the slag bath in the direction of gravity, a device for breaking up the slag is provided below the slag bath, and a sluice valve is provided between the containers. A space filled with a gas bubble, which space stands in contact with the liquid in the containers, particularly a ring space or a separate container, is provided, in which the pressure of the gas bubble is regulated by supplying gas. At least a part of the water situated in the slag sluice/collection space flows through the slag bath valve when the latter is opened, in the direction of the slag bath, counter to the direction of gravity.

Abstract: Fluid filter elements and assemblies are used to separate contaminants from a fluid, such as oil or fuel, prior to reaching an engine. Fluid filter assemblies may comprise a housing, a filter element, and a filter head. The filter element may be disposed within the filter housing and enclosed by the filter head. Fluid enters the housing and passes through the filter element. The fluid may then exit the assembly. A connector may be used to connect the filter element to the filter head to ensure proper installation and simplify removal of a fouled filter element. The connector permits removable coupling of the filter element to the filter head and resists unintentional disengagement to securely couple the filter element to the filter head.