METHOD AND SYSTEM FOR PRODUCING CHLORINATED HYDROCARBONS WITH HYDROGEN CHLORIDE INTEGRATION

摘要

Embodiments of the present disclosure include a method and a system for producing chloromethanes. A chlor-alkali reactor produces dichlorine and dihydrogen. A thermal chlorination reactor connected to the chlor-alkali reactor and a hydrochlorination reactor produces dichloromethane, trichloromethane and a first portion of hydrogen chloride (HCl) from a first portion of the dichlorine from the chlor-alkali reactor and chloromethane from the hydrochlorination reactor. A chlorine burner connected to the chlor-alkali reactor produces HCl from dihydrogen and a second portion of the dichlorine from the chlor-alkali reactor. An adiabatic absorber connected to the chlorine burner concentrates the HCl produced in the chlorine burner. A desorbing unit connected to the adiabatic absorber produces a second portion of HCl from the hydrogen chloride concentrated coming from the adiabatic absorber. The hydrochlorination reactor connected to the desorbing unit and the thermal chlorination reactor reacts methanol with the first portion of HCl and the second portion of HCl in the presence of a catalyst to produce hydrochloric acid and the chloromethane used in the thermal chlorination reactor.