Original scientific paper
Effect of Cd2+, Cr3+, Cu2+, Al3+, Co2+ ions on the chemical recycling of poly(ethylene terephthalate) in sulphuric acid
Hayat TABEIKH
; Department of Chemistry, Faculty of Science, Damascus University, Damascus, Syria
M. Hassan Al KURDI
; Department of Chemistry, Faculty of Science, Damascus University, Damascus, Syria
Zaki AJJI
; Polymer Technology Division, Department of Radiation Technology, Damascus, Syria
Abstract
Poly(ethylene terephthalate) has been hydrolyzed in sulphuric acid using various additives (Cd2+, Cr3+, Cu2+, Al3+, Co2+) in order to investigate their influence on the reaction conversion. The addition of 5 μM of the single ions does not seem to increase the conversion significantly, but the addition of 30 μM does enhance the conversion compared with 5 μM. Cd2+ and Al3+ ions seem to be the best additives which improve the reaction conversion obviously. The increase in the acid concentration leads to increase in the hydrolysis conversion. The addition of iron ions to the studied ions seems to suppress the reaction in some cases (Cr3+, Cu2+, Co2+) and the conversion was consequently lower than in the ion free acidic solution. Using binary mixture of iron ions with Cd2+ and Al3+ does not show a significant increase in the conversion compared with the use of single ions.
Keywords
hydrolysis; metal ions; poly(ethylene terephthalate); recycling; sulphuric acid
Hrčak ID:
124843
URI
Publication date:
11.7.2014.
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