Open AccessRegeneration and utilization of solvents after the process of physical and chemical cleaning of metal optics
Author(s) -
С. А. Филин,
В. Е. Рогалин,
И. А. Каплунов
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/656/1/012018
Subject(s) - freon , adsorption , polymer , chemical engineering , membrane , chemistry , silica gel , solvent , metal ions in aqueous solution , ion exchange , semipermeable membrane , metal , materials science , organic chemistry , ion , biochemistry , engineering
The possibility of application of a semipermeable polymer membrane in total with the method of rectification purification for the repeated use of freon-114 B 2 and detergent compositions based on it for cleaning metal optics in a closed technological cycle while ensuring the environmental cleanliness of the process and saving solvents has been identified and justified. The investigated adsorption method is effective for cleaning freon-114 B 2 from rosin resins contaminats: among adsorbents (activated carbon, silica gel, anion exchange resin IA-I, silica gel S-80). Silica gel S-80 has the highest adsorption capacity (up to 50 mg / l). It has been shown that regeneration of freon-114 B 2 with the help of a polymer semipermeable membrane after its use for cleaning metal optics allows to reduce the amount of impurities present in it by at least 2 orders of magnitude. Moreover, organic molecules, that have long surfactant chains, oils, fats of organic and mineral origin are almost completely separated from the regenerated solvent.