Abstract: A landfill leachate collection and removal system in combination with a leachate and leakage detection system has been developed which includes a leachate collection sump intended to receive all of the rain which falls within the confines of the landfill. This rainfall may flow across the landfill floor to a sump or it may "leach" downward through waste into a drainage media and on to the sump. Further downward percolation of water is prevented by a first liner. The landfill system includes a leak detection sump system, intended to collect only that leachate which passes or leaks through the first liner. Both the collection and detection sumps are fabricated for examples, from high density polyethylene. Both sumps are perforated at definite elevations and both sumps rest in a concrete basin. A second liner lies between the sump bottoms and the concrete basin and the first liner is preferably welded to flanges on the sumps.

Abstract: A pressure relief device for a process or pipeline including a vertical column, preferably open to the atmosphere near the top, having a certain level of liquid therein and a conduit loop in fluid communication with the column and attached to the column near the bottom of the column and generally extending upward to a predetermined distance from the bottom to a point wherein the conduit is in fluid communication with the pipeline, the conduit having a certain level of liquid which is dependent upon the column liquid level, the pressure in the pipeline, and the density of the liquid, the column having a diameter and height large enough to prevent entrainment of the liquid when the pressure in the pipeline is relieving.

Abstract: A water-insoluble pigment comprising a complex of a water-insoluble inorganic substrate exhibiting anion exchange properties, a water-soluble dye, and an anionic amphipathic material is disclosed.

Abstract: A water-insoluble pigment comprising a complex of an inorganic water-insoluble anion exchange material and a water-soluble dye is disclosed. The anion exchange material may be represented by the general formula:[M.sub.1-x.sup.a Q.sub.x.sup.a+1 O.sub.y (OH).sub.z ](A.sup.-1).sub.d (A.sup.-2).sub.e (A.sup.-3).sub.f (A.sup.-4).sub.g.nH.sub.2 Owherein M is a metal element or elements each with a positive valence of a; Q is a metal element or elements each with a positive valence of a+1; a is 2, 3, 4 or 5; A.sup.-1, A.sup.-2, A.sup.-3, and A.sup.-4 are each one or more exchangeable anions each having a negative valence of 1, 2, 3 and 4, respectively; x is 0<x.ltoreq.0.5; and n, y, z, d, e, f, and g are real numbers greater than or equal to zero and satisfy the following:2y+z=a0<d+2e+3f+4g.ltoreq.x0.ltoreq.n.ltoreq.10provided that when y=0, a is not equal to 2.

Abstract: A water-insoluble pigment comprising a complex of an anion exchange material with a layered crystal structure and a water-soluble dye is disclosed. The anion exchange material may be represented by the general formula:[M.sub.x.sup.+1 Q.sub.y.sup.+2.Al(OH).sub.3 ](A.sup.-1).sub.d (A.sup.-2).sub.e (A.sup.-3).sub.f (A.sup.-4).sub.g.nH.sub.2 Owhere M is a metal element or elements each with a positive valence of 1; Q is a metal element or elements each with a positive valence of 2; A.sup.-1, A.sup.-2, A.sup.-3, and A.sup.-4 are each one or more exchangeable anions each having a negative valence of 1, 2, 3, and 4 respectively; and n, x, y, d, e, f, and g are real numbers greater than or equal to zero and satisfy the following:0<x+2y.ltoreq.1d+2e+3f+4g=x+2y0.ltoreq.n.ltoreq.

Abstract: An apparatus and method are disclosed for determining the cleanliness of an electronic circuit assembly (ECA) such as printed circuit boards (PCB) following normal cleaning and flux removal processes. The apparatus and method are used to quantitatively measure the organic contaminants such as the amount of rosin flux remaining on an ECA. The apparatus utilizes small volumes of isopropanol and a spectrophotometric analytical instrument. The apparatus generally provideds for washing the "cleaned" or defluxed ECA with a measured volume of isopropanol and thereafter measuring the organic contaminants in the wash solution by spectrometric analysis. The results can then be compared to a standard.

Abstract: A corrosion inhibiting composition including a solution of at least one alkali or alkaline-earth metal halide in water and specific corrosion inhibiting concentrations of zinc ions and thiocyanate ions, for use in well drilling, completion, packer fluid and workover operations.

Abstract: A novel composition including an inorganic mixed metal oxides and partially hydrated oxides exhibiting anion exchange properties and a method of preparing the exchanger composition by coprecipitating hydroxides or hydrated oxides of a pair of metal elements such as aluminum and titanium, drying the mixed metal hydroxides or hydrated oxides, exchanging the anion of the mixed metal hydroxide or hydrated oxide for a nonvolatile anion such as a sulfate anion and calcining the mixed metal hydroxide or hydrated oxide to form a mixed metal oxide or partially hydrated oxide exhibiting anion exchange properties.

Abstract: A tentering apparatus for tensioning a sheet-like member, for example, a membrane used in an electrolyzer. The apparatus includes four clamping assemblies arranged in a frame-shape configuration within an outer frame member, and a fastener, such as a threaded bolt and wing unit, for fastening the clamping assemblies to the outer frame members and for tensioning the sheet-like member.

Abstract: A combination seal and tentering means for an electrolysis cell comprising a substantially solid member interposed between at least one side of a separator of the cell and at least one electrode frame member of the cell. The substantially solid member has a first generally planar surface in contact with one side of the separator of the cell and a second uneven surface in contact with the electrode frame of the cell and a periphery defining a shoulder portion having an inside in contact with the outside surface of the electrode frame member.

Abstract: A device for separating water vapor from a sample of air has been developed. The device utilizes a water permeable membrane to separate the water vapor from an air stream containing other vapors, for example, organic vapors. The device is applicable, for example, in industrial hygiene applications to reduce or change humidity in an air stream prior to collection of organics on a sorbent tube.

Abstract: A bipolar electrolytic cell assembly of the filter press-type comprising a first frame member, a second frame member, a separator interposed between the first and second frames to space apart an anode and cathode and a pre-compressed seal means interposed between at least the first or second frame member and the separator.

Abstract: A tentering apparatus for tensioning a sheet-like member, for example, a membrane used in an electrolyzer. The tentering apparatus includes four clamping assemblies arranged in a picture frame shape configuration adapted for clamping at least a portion of its periphery of a sheet-like member. One pair of clamping assemblies have studs at each end rotatably mounted at the ends of the second pair of clamping assemblies. A planar sheet-like member is tensioned by clamping the periphery of the sheet-like member and applying a pulling force generally outwardly and normal to the second pair of clamping assemblies and rotating the first pair of clamping assemblies to cause a pulling force generally normal to the first pair of clamping assemblies.

Abstract: A method for analyzing the serum phase of a latex solution by permeating low molecular weight components present in the serum phase for a known amount of time through a size selective permeable membrane to a dialysate fluid and sequentially injecting the dialysate fluid into a liquid chromatograph for subsequent analysis.

Abstract: An electrode produced by electroplating ruthenium metal on a substrate from a nonacidic ruthenium-containing electroplating solution.

Abstract: A method removing water from aqueous alkali metal hydroxide solutions by contacting the solution with an organic liquid at elevated temperatures and pressures to form an organic liquid-water phase and a hydroxide solution phase and thereafter separating the organic water phase from the hydroxide solution phase.