 | | |
| Detoxification of hexachlorobenzene by dechlorination with potassium-sodium alloy [An article from: Chemosphere] | ![Detoxification of hexachlorobenzene by dechlorination with potassium-sodium alloy [An article from: Chemosphere]](http://ecx.images-amazon.com/images/I/51M6G4MFGFL._SL160_.jpg)
 enlarge | Buy New: $8.95
Category: Book
Authors: K. Miyoshi, T. Nishio, A. Yasuhara, M. Morita, Shi
Publisher: Elsevier
Studio: Elsevier
Manufacturer: Elsevier
Label: Elsevier
Format: Html
Language: English (Published)
Media: Digital
ASIN: B000RQYQJ8
Publication Date: June 1, 2004
Availability: Available for download now
|
| Editorial Reviews:
Product Description
This digital document is a journal article from Chemosphere, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Dechlorination of hexachlorobenzene (HCB) was achieved by a liquid potassium-sodium (K-Na)-alloy. HCB in a cyclohexane/benzene solution (22 mmol/l, 4.67 g/l as chlorine) was dechlorinated by almost 100% after a 30-min reaction, indicating high reactivity of K-Na alloy and high proton donating power of cyclohexane. Decreasing orders of chlorobenzenes identified after a 15-min reaction, by amount were 1,2,3,4->1,2,3,5->1,2,4,5- for tetrachlorobenzenes, 1,2,4->1,2,3->1,3,5- for trichlorobenzenes, and 1,4->1,3->1,2- for dichlorobenzenes. It was hypothesized that once one chlorine atom in HCB was replaced with a proton, the adjacent chlorine atom to the proton tended to be replaced with another hydrogen atom. A total of 63 PCBs formed via the Wurtz-Fittig reaction were identified as by-products in the sample after a 15-min reaction. Among PCBs found, 2,3^',4^',5-tetrachlorobiphenyl, which was a product from 1,2,4-trichlorobenzene formed via the Wurtz-Fittig reaction, was detected in relatively high concentration (48.9 nmol/ml). The sample obtained from a reaction mixture after 30 min contained only 14 PCBs in trace amounts, indicating that the PCBs formed were also further dechlorinated by K-Na alloy. Non-chlorinated compounds--such as methylbenzene, dimethylbenzene, dimer of tetrahydrofuran, and dicyclohexyl (dimer of cyclohexane)--were also identified in the samples. A method using K-Na alloy developed in the present study dechlorinated satisfactorily HCB at room temperature.
|
|
|
Copyright 'Detox4Vitality.com' | | |