Interaction of Carbon Blacks with Hydroquinone in Aqueous Solution
| Main Authors: | BALWANT RAl PURl, S. K. SHARMA, I. S. DOSANJH, D. L. GANDHI |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1976
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6389036 |
Daftar Isi:
- Department of Chemistry, Panjab University, Chandigarh Manuscript received 15 September 1975 ; revised 26 December 1975, accepted 19 February 1976 Interaction of hydroquinone in aqueous solution with carbon black involves physical adsorption as well as chemisorption of hydroqninone on the surface of the black. There is no evidence for oxidation of hydroquinone to quinone. Physical adsorption seems to be a function of surface area while chemisorption appears to occur at sites occupied by quinonic oxygen resulting in the formation of semi-quinonic structures on the surface. In the case of oxygen-free carbons, as those obtained on outgassing at 1000°, chemisorption occurs probably, at the sites vacated by quinonic groups. The chemisorbed hydroquinone can be recovered to the extent of over 70 per cent, in either case, on treating the carbon with boiling solution of sodium sulphate under reflux.