Regeneration and utilization of solvents after the process of physical and chemical cleaning of metal optics

The possibility of application of a semipermeable polymer membrane in total with the method of rectification purification for the repeated use of freon-114B2 and detergent compositions based on it for cleaning metal optics in a closed technological cycle while ensuring the environmental cleanliness...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2019-11, Vol.656 (1), p.12018
Main Authors: Filin, S A, Rogalin, V E, Kaplunov, I A
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Anion exchanging
Chemical cleaning
Freons
Membranes
Organic chemistry
Polymers
Regeneration
Rosin
Silica gel
Silicon dioxide
Solvents
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Summary:The possibility of application of a semipermeable polymer membrane in total with the method of rectification purification for the repeated use of freon-114B2 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-114B2 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-114B2 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.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/656/1/012018