Abstract: Asymmetric membranes for osmosis and ultrafiltration are prepared from fluorinated polymers which are dissolved in one or more solvents, cast on a plate, allowed to evaporate and precipitated with a nonsolvent. The polymeric material can variously be modified by chemical reactions, irradiations or both. By varying the chemical and physical parameters of the preparation run, a variety of membranes can be obtained which have the most varied performances and properties.
Abstract: A method is disclosed for removing metallic mercury from industrial sewage waters, the improvement consisting in that the polluted liquors are treated with activated carbon having a high specific surface.
Abstract: The present invention provides an optical instrument for measuring concentrations of polluting gases on long and short geometric paths. The apparatus comprises a telescope for focussing a ray of light into a spectrometer, a comparison cell containing a known concentration of a polluting gas, control means and an electronic apparatus adapted to determine the concentration of the polluting gas in the analytical sample.
Abstract: The present invention concerns a method for purifying waste waters which come from the regeneration of the anionic and cationic resins used in the treatment of sugar juices. The method includes subjecting the waste waters to one or more zones which include an inverse osmosis section and one or more electrolysis cells.
Type:
Grant
Filed:
June 14, 1974
Date of Patent:
June 8, 1976
Assignee:
Tecneco S.p.A.
Inventors:
Giorgio Pascarella, Francesco Salvemini
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