Butadiene from the Pyrolysis of 2,3-Dichlorobutane

Author: Skinner, Davis Ayres

Year: 1936

Degree: Master's thesis

Advisors: Lacey, William Noble; Lucas, Howard J.

Committee Member: Unknown, Unknown

Option: Chemical Engineering

DOI: 10.7907/ZX4V-1K10

Abstract

Summary:

1. A satisfactory laboratory apparatus and method for preparing butadiene from 2,3-dichlorobutane, by passing over BaCl₂ on pumice, at temperatures ranging from 500-600°C., has been described.

2. An analytical method for the products is developed using maleic anhydride to absorb butadiene, 87 percent sulfuric acid for butenes, and fractional distillation for the separation of chlorobutenes from the butadiene.

3. Butadiene, chlorobutene, butene, lower hydrocarbons, and hydrochloric acid have been shown to result from the pyrolysis of 2,3-dichlorobutane over BaCl₂.

4. Conditions are described for obtaining yield, of butadiene as high as 57.6% and optimum conditions are predicted. The higher yields here obtained exceeding those found in the literature, for this pyrolysis.

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