Production of allyl chloride
OwnerJohn E. Staufferinventor
Life of this patent
Estimating the term…
Abstract
A process is provided for the production of allyl chloride from three carbon atom hydrocarbons (propane and/or propylene) using hydrogen chloride or hydrogen chloride/chlorine mixtures as the chlorinating agent. The process includes reaction steps operated in tandem in separate zones first comprising the reaction of perchloroethylene with hydrogen chloride and oxygen in the presence of an oxychlorination catalyst to give hexachloroethane and water, second comprising the vapor phase reaction of hexachloroethane with propane/propylene feedstock to produce allyl chloride, perchloroethylene, and hydrogen chloride, and third isolating the products of the second step and repeating the first step using as starting materials the thus isolated perchloroethylene and hydrogen chloride.
Claims11
A process for the production of allyl chloride using hydrogen chloride as a source of chlorine, said process including reaction steps operated in tandem;
- first subjecting perchloroethylene to oxychlorination with hydrogen chloride and oxygen in the presence of an oxychlorination catalyst to give reaction products consisting essentially of hexachloroethane and water;
- second, isolating and reacting said hexachloroethane with a hydrocarbon containing three carbon atoms and optionally added chlorine, in the vapor phase to produce a product stream comprising predominantly allyl chloride, perchloroethylene and hydrogen chloride;
- and
- third, isolating said products of the second step and repeating the first step using as starting materials the perchloroethylene and hydrogen chloride thus isolated whereby chlorination using regenerated hexachloroethane is accomplished, the process being operated with total utilization of hydrogen chloride and net production of hydrogen chloride and hexachloroethane is avoided.
Dependencies are inferred from the claim text.