title: Effect of Parameters on Oxychlorination of Tert-Butyl Ethers.
abstract: The effect of concentration, molar ratios of reagents, pH, and temperature on formation of chloro-organic products in reaction of tert-butyl ethers with chloride ions and hydrogen peroxide has been determined. A significant effect of Cl(-) ions and H(2)O(2) molar ratios on the rate of chloro-organic product formation has been observed. Studies on oxychlorination of tert-butylethyl ether (ETBE) at pH 7, 3.5, and 2.5 have been carried out. It was found that introduction of hydronium ions into the reaction system considerably hastened the process of chloro-organic product formation. Hydronium ions contribute to the formation of the reactive tert-butyl carbocation, which undergoes secondary reactions in the presence of reactive forms of chlorine and oxygen. Moreover, the effect of temperature on ETBE (tert-butylethyl ether) and MTBE (tert-butylmethyl ether) conversions was verified. The reactions of MTBE and ETBE oxychlorination were carried out at temperatures of 5 degrees C, 20 degrees C, and 35 degrees C.
authors.affiliation: Department of Chemistry and Environmental Protection, Faculty of Chemical Technology and Engineering, University of Technology and Agriculture, Seminaryjna 385-326, Bydgoszcz, Poland.
authors.forename: Jerzy
authors.initials: J
authors.lastname: Gaca
authors.forename: Alicja
authors.initials: A
authors.lastname: Gackowska
authors.forename: Natalia
authors.initials: N
authors.lastname: Belt
references.citation: Environ Sci Technol. 2002 Sep 1;36(17):3652-61
references.pmid: 12322734
references.citation: Environ Sci Technol. 2001 Apr 1;35(7):1469-74
references.pmid: 11348088
references.citation: Environ Sci Technol. 2004 Oct 15;38(20):5405-12
references.pmid: 15543744
references.citation: Chemosphere. 2002 Oct;49(4):413-20
references.pmid: 12365838
references.citation: Environ Sci Technol. 2001 Oct 1;35(19):3954-61
references.pmid: 11642459
references.citation: Chemosphere. 2004 Feb;54(6):689-94
references.pmid: 14602101
references.citation: Chemosphere. 2006 Mar;63(1):165-70
references.pmid: 16146644