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Treatment of the butadiene washing stream from a synthetic rubber industry and recovery of p-TBC.
- Source :
-
Water Science & Technology . 2006, Vol. 54 Issue 10, p17-21. 5p. - Publication Year :
- 2006
-
Abstract
- Butadiene is marketed containing p-tertbutylcatechol (p-TBC), a polymerization inhibitor that should be removed before butadiene utilization in synthetic rubber production. p-TBC can be removed from butadiene by washing with sodium hydroxide (NaOH) solution, producing a wastewater with pH 14, which contains high amounts of p-TBC, a toxic chemical compound, The aim of this work was to develop a treatment process that could reduce the content of p-TBC from the wastewater. Since p-TBC is very soluble in basic, but not in neutral and acid solutions, acidification tests were performed with phosphoric acid (H3PO4) to precipitate p-TBC. Reaction between NaOH and H3PO4 can result in crystallization of large amounts of salt without p-TBC precipitation. Under selected acidifyfng conditions p-TBC precipitates and the wastewater COD is highly reduced (> 90%). Chromatographic determinations showed that the precipitated p-TBC could be recovered with 99% purity. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02731223
- Volume :
- 54
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Water Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 23493720
- Full Text :
- https://doi.org/10.2166/wst.2006.885