Record Display for the EPA National Library Catalog
RECORD NUMBER: 165 OF 200
|OLS Field Name||OLS Field Data|
|Main Title||Study of feasibility of herbicide orange chlorinolysis /|
|Author||Lavergne, Edgar A.|
|CORP Author||Diamond Shamrock Corp., Painesville, OH. T. R. Evans Research Center.;Environmental Protection Agency, Washington, DC. Office of Research and Development.|
|Publisher||Office of Research and Development, U.S. Environmental Protection Agency,|
|Report Number||EPA/600/2-74/006; EPA-68-01-0457|
|Stock Number||PB-286 705|
|Additional Subjects||Herbicides ; Chemical industry ; Feasibility ; Samples ; Markets ; Carbon tetrachloride ; Hydrogen chloride ; Oxygen organic compounds ; Phosgene ; Thermodynamics ; Economics ; Distillation ; Toxicology ; Residues ; Process charting ; Design criteria ; Herbicide orange ; Chlorinolysis ; Dioxin|
|Collation||67 pages : illustrations.|
A process termed chlorinolysis (exhaustive chlorination) was applied to samples of USAF Herbicide ORANGE. The ORANGE (50/50 volume mixture of the n-butyl esters of 2,4-D and 2,4,5-T) contained a production impurity called dioxin - a powerful teratogen. The research objective was to demonstrate the feasibility of converting such herbicides into marketable products, namely, carbon tetrachloride (CCl4), carbonyl chloride (COCl2), and hydrogen chloride (HCl), while destroying any dioxin present. Bench scale (100 g/hr) chlorinolysis of ORANGE was evaluated over a range of reactor conditions. The critical reaction parameters were found to be: chlorine to carbon ratio (4.4 - 7.2); temperature (600 - 800 deg C); pressure (225 - 300 psig); and retention time (0.5 - 1.0 minute). Thermodynamic analysis had indicated that CCl4, hexachlorobenzene (HCB), and chlorine (Cl2) would exist in equilibrium at the reaction conditions utilized. Because of the balance required between reaction rate (reactor size) and HCB content of the effluent, recycle of unconverted HCB from the product recovery system was found to be necessary. Recycle tests indicated that single pass HCB conversion rates of 80% could be realized.
Contract no. 68-01-0457. Program element 1BB036. Includes bibliographical references. Microfiche.