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Optimization of the Technological Parameters of 3-Chloro-3-methyl-l-butene Synthesis

G. Lewandowski and E. Milchert

Department of Organic Technology, Technical University of Szczecin, PL-70322 Szczecin


Abstract: The isoprene hydrochlorination has been investigated in the presence of anhydrous diethyl ether, diethyl ether containing water, and in the presence of water and ammonium salt. Conditions of the highest selectivity of the transformation of isoprene to 3-chloro-3-methyl-1-butene in an isoprene-water system in the presence of didodecyldimethylammonium bromide have been established basing on statistical methods of the design of the experiments. The conditions are as follows: temperature -30°C, hydrogen chloride to isoprene mole ratio 0.45, hydrogen chloride flow rate 0.01 g min-1 (for 1 g of isoprene), water mass fraction (w) 5.0 mass %, didodecyldimethylammonium bromide w = 0.2 mass %.. Also the conditions of the highest isoprene conversion were worked out and the isomerization of chloromethylbutene was investigated.

Full paper in Portable Document Format: 523a167.pdf


Chemical Papers 52 (3) 167–174 (1998)

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