A stand of coniferous trees growing by natural processes and exposed to an atmosphere containing nitrogen pollution compounds is treated to improve the resistance of the trees to damage by acid rain by a method which comprises foliarly applying at least one sugar selected from monasaccharides and...

The condensation property of SO2 as H2SO4 (liquid) is used to quantitatively separate SO3 and H2SO4 from SO2 in a monitored gas environment containing H2O by appropriate temperature control. The combined SO2 and SO3 content of a sample of the gas is measured. Then, SO2 is separated by cooling the...

A process and apparatus are described for preventing NOx emissions after emergency shutdowns in plants for the manufacture of nitric acid by catalytic combustion of ammonia with air, compression of the nitrous combustion gases, and chemical and/or physical absorption of the nitrous gases from the...

A process is described by which environmental pollution is avoided when the ammonia supply to a nitric acid plant is abruptly cut off necessitating removal of nitrous gases. Nitric acid is produced by the catalytic combustion of ammonia with air to form nitrous combustion gases which are contacted ...

The invention covers a polymer composition for packaging purposes which is degradable by the action of ultraviolet light and/or sunlight to reduce environmental pollution. The polymer component comprises thermoplastics polymers of alpha -olefins (high and low density polyethylene) or polystyrene...

When phosphate ores are digested with sulfuric acid to produce wet-process phosphoric acid, fluorapatite in the ore forms fluorine compounds which are discharged into the surrounding air. The fluorine-containing air is scrubbed with water to remove these compounds. However, when the scrubber water...

A method is described for the start-up of a partial oxidation gas generation process for the production of fuel gas, reducing gas, or synthesis gas by partial oxidation of a carbonaceous fuel with an oxygen-containing gas. It is specifically useful when the nature of the feedstock is such that...

Liquid fertilizers are produced by a process wherein wastewater from a phosphorus smelting furnace is incorporated. The wastewater replaces water evaporated and dissolves fertilizer salts thus avoiding a serious water pollution problem. Impure phosphoric acid is neutralized in the condensing...

A waste recovery process at phosphorus furnaces is disclosed wherein small sized discrete particles of carbonaceous material or beneficiated phosphate ore are mixed with a mineral acid, an alkaline fluid and water. The reacted mixture is tumbled in a horizontal cylinder at a temperature below that...

3 adjacent chambers are used in each single cell, the middle chamber being defined on both sides by ion exchanger membranes of the same directional selectivity, and the adjacent chambers being defined on their exterior sides by ion exchanger membranes of opposite selectivity to the latter...