| Title | Recovery of high purity sulfuric acid from the waste acid in toluene nitration process by rectification |
| Authors | Song, Kai Meng, Qingqiang Shu, Fan Ye, Zhengfang |
| Affiliation | Peking Univ, Dept Environm Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China. |
| Keywords | Sulfuric acid Recovery Rectification Nitro aromatic compounds DIFFUSION-DIALYSIS AQUEOUS-SOLUTIONS FENTON OXIDATION WATER TRINITROTOLUENE NITROGEN AMMONIA H2SO4 |
| Issue Date | 2013 |
| Publisher | chemosphere |
| Citation | CHEMOSPHERE.2013,90,(4),1558-1562. |
| Abstract | Waste sulfuric acid is a byproduct generated from numerous industrial chemical processes. It is essential to remove the impurities and recover the sulfuric acid from the waste acid. In this study the rectification method was introduced to recover high purity sulfuric acid from the waste acid generated in toluene nitration process by using rectification column. The waste acid quality before and after rectification were evaluated using UV-Vis spectroscopy, GC/MS, HPLC and other physical and chemical analysis. It was shown that five nitro aromatic compounds in the waste acid were substantially removed and high purity sulfuric acid was also recovered in the rectification process at the same time. The COD was removed by 94% and the chrominance was reduced from 1000 degrees to 1 degrees. The recovered sulfuric acid with the concentration reaching 98.2 wt% had a comparable quality with commercial sulfuric acid and could be recycled back into the toluene nitration process, which could avoid waste of resources and reduce the environmental impact and pollution. (C) 2012 Elsevier Ltd. All rights reserved. |
| URI | http://hdl.handle.net/20.500.11897/158842 |
| ISSN | 0045-6535 |
| DOI | 10.1016/j.chemosphere.2012.09.043 |
| Indexed | SCI(E) EI PubMed |
| Appears in Collections: | 环境科学与工程学院 水沙科学教育部重点实验室（联合） |
