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JSIR Vol.66 [2007] >
JSIR Vol.66(07) [July 2007] >
| Title: | Use of ultrasound in chrome recovery process in leather industry |
| Authors: | Sivakumar, V
Verma, V Ravi
Swaminathan, G
Rao, P G |
| Keywords: | Chrome recovery
Leather
Sonochemistry
Tanning
Ultrasound |
| Issue Date: | Jul-2007 |
| Publisher: | CSIR |
| IPC Code: | C14C3/00 |
| Abstract: | In this study, the influence of ultrasound on the stoichiometric use of precipitating agent magnesium oxide, (MgO)
as an alkali in the recovery of chrome from the spent tanning liquors has been studied. The use of MgO in chrome recovery
assists settling characteristics but suffers from low solubility and reactivity. A significant improvement (3-fold) is observed in
settling rate of chromic hydroxide precipitate with the use of pre-sonicated MgO as compared to control (no sonication). A
considerable decrease of Cr in the supernatant liquor after precipitation suggests better recovery due to better dispersion and
particle-size reduction of MgO in water due to sonication. No appreciable improvement with sonicated sodium carbonate
solution prior to chrome recovery may be due to sodium carbonate itself is highly water soluble in comparison to MgO. |
| Page(s): | 545-549 |
| ISSN: | 0022-4456 |
| Source: | JSIR Vol.66(07) [July 2007]
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