کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10390174 | 884466 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Recovery of high purity 2,4-dinitrotoluene from spent mixed acid in toluene nitration process
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
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چکیده انگلیسی
Two easy practical methods for recovery of high purity 2,4-dinitrotoluene (DNT) from spent mixed acid in toluene nitration process are established. One is the dilution manner which produces high purity crystal of 2,4-DNT (>99Â wt.%) by addition of proper amounts of deionized water into the spent mixed acid. The other is a refrigeration method which also evaluates high purity crystal of 2,4-DNT (>98Â wt.%) by means of simply cooling down spent mixed acid below 283Â K. According to the analysis of gas chromatograph-mass spectrometer (GC-MS), the ingredients of crystals were identified. Further, the influence of dilution procedure, refrigeration treatment, and adjustment of pH value on the performance of abatement of total organic compounds (TOC) were elucidated in this research. It was found that the organic compounds dissolving in aqueous spent mixed acid are in equilibrium with the organic phase of dinitrotoluene isomers. Besides, the solubility of each organic component in spent acid depends upon the concentration of spent sulfuric acid.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 41, Issue 1, January 2005, Pages 57-63
Journal: Separation and Purification Technology - Volume 41, Issue 1, January 2005, Pages 57-63
نویسندگان
Wen-Shing Chen, Chien-Neng Juan, Kuo-Ming Wei,