Patent ID: 6800257
Filing Date: 2004-10-05
Classification: B01J,C02F,C07C

Abstract:
An apparatus for preparing solid trichloroacetic acid comprising:a reaction coil for reacting a mixed gas comprising gaseous tetrachloroethylene and a gas produced by aerating a functional water with an oxygen-containing gas, said reaction coil being capable of producing said trichloroacetic acid under light irradiation; a light irradiator, about which the reaction coil is wound, for irradiating the mixed gas in the reaction coil with light in a wavelength range of 300 to 500 nm to decompose tetrachloroethylene and generate said trichloroacetic acid; and a recovery bath connected to the reaction coil for extracting said trichloroacetic acid from the reacted mixed gas, having an inlet and an outlet, wherein the inlet is located in an upper portion of the recovery bath for depositing said trichloroacetic acid in a liquid state on a bottom of the recovery bath, in which said trichloroacetic acid can be cooled and condensed, wherein the outlet is located in the upper portion of the recovery bath for exhausting the mixed gas from which said trichloroacetic acid has been extracted, and wherein the apparatus further comprises a trap, connected to the recovery bath, for adsorbing excess chlorine gas and hydrogen chloride gas from the mixed gas, which has already undergone the trichloroacetic acid extraction.