Improvements in an air injection type exhaust emission purifying device for a gasoline engine, the improvements consisting of an air pump driven by the engine for supplying air to the exhaust port of each cylinder to cause an oxidizing reaction between the air and hot exhaust gases, and at least one sparking or heating plug provided in an exhaust manifold to fire and burn a good mixture of air and highly dense unburned hydrocarbon resulting from the misfiring caused during the deceleration of th...

A water purifying device employing a reverse osmosis water purifying element that process feed water under line pressure producing purified product water that is accumulated in a compressible container. The container supplies the product water upon operation of a control valve to a product water supply outlet. The control valve directs feed water under line pressure to compress the compressible container and thus force the product water at line pressure to the water supply outlet. This use of th...

Biphenyl contaminated with methylbiphenyls may be purified by heating the crude biphenyl to a melt, oxidizing the methylbiphenyls to their corresponding acids by passing air or oxygen through the melt, and removing the acids formed through distillation.

An exhaust gas purifying device for internal combustion engines comprising a thermo-valve mounted in an air passage through which secondary air is supplied to the intake manifold and adapted to operate by responding to the degree to which the engine is warmed up, a flow rate regulating valve also mounted in said air passage through which secondary air is supplied to the intake manifold and adapted to regulate the flow rate of secondary air supplied to the intake manifold in accordance with the o...

Crude vanillin in aqueous mixture with structurally related compounds, particularly vanillin from the mother liquors obtained in purification of vanillin derived from the oxidation of lignin liquor, is purified by partial extraction with hot hydrocarbon solvent, cooling to crystallize vanillin therefrom and repeating the procedure, preferably re-using the same portion of solvent, to extract succeeding portions of vanillin.

Apparatus for purifying blood comprises a vessel containing one or more chambers arranged in series and containing micro-beads which enclose adsorbents and reagents for purifying blood. The vessel also includes a stator cavity which contains a pump rotor, preferably driven by an external rotary magnet. Means for agitating the beads in the chamber preferably consist of vanes connected to the pump rotor. In a preferred arrangement of the apparatus, the beads in a first chamber nearest the inlet co...

A liquid-purifying system particularly for purifying the solvent used in a dry-cleaning machine comprises a combined filter and still. Filter cartridges are arranged in a closed vessel which also is provided with a heating coil for vaporizing liquid in the vessel. The level of liquid in the vessel is automatically controlled during distillation operation to provide a vapor space above the liquid. A condenser connected with the vapor space condenses the vapor produced by vaporization of the liqui...

A process and device in which air or another gas mixture is contacted with a liquid whereby particulate impurities are washed from the gas and whereby sulfur dioxide and other gaseous pollutants, together with oxygen, are absorbed from the gas into the liquid whereupon said sulfur dioxide and other gaseous pollutants are oxidized to other more soluble chemical forms with the assistance of a catalyst present within the system.

In a closed coolant loop of a nuclear reactor there is provided an apparatus for purifying contaminated nuclear reactor coolant gas of nuclear decomposition products, comprising filtering means for filtering a uniform flow of contaminated gas to be purified, the filtering means having components consisting at least partly of copper, gas removing means for removing a test quantity of the contaminated gas flowing through the filtering means, gas testing means connected to the gas removing means fo...

Impure terephthalic acid contaminated with intermediate products of the oxidation of p-xylene is processed into a state suitable for easy direct esterification with glycol by a combination of contact of the crude acid at 600.degree.-750.degree.F. in the vapor state with a Group VIII metal catalyst (e.g., Pt or Pd on carbon) and condensation of the purified acid from the treated vapor together with subsequent disintegration of the resulting predominantly rough aggregate particles of condensate by...