METHOD FOR RECOVERING HALOGENATED HYDROCARBON AND LOWER ALCOHOL

• Main Authors: KANEKO ISAO, SHIMA HIDEYUKI
• Format: Patent
• Language: English
• Published: 11.11.2010
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a method for efficiently recovering organic solvents using an activated-carbon column from a gas containing the organic solvents, especially halogenated hydrocarbons and lower alcohols. SOLUTION: The mixed gas containing halogenated hydrocarbons and lower alcohols is supplied to the activated-carbon column loaded with activated carbon by which the halogenated hydrocarbons and lower alcohols are adsorbed and recovered. The activated carbon loaded in the activated-carbon column is treated beforehand so as to contain water and the mixed gas is supplied to the activated-carbon column at a temperature of 25-40°C and a relative humidity of 30-50%. When Ta is defined as a time when the concentration of the lower alcohols in the mixed gas at the outlet of the activated-carbon column reduces to 1/10 of the concentration at the inlet and Tb is defined as a time when the concentration of the halogenated hydrocarbons in the mixed gas at the outlet of the activated-carbon column reduces to 1/10 of the concentration at the inlet, Ta/Tb is 0.9-1.1. COPYRIGHT: (C)2011,JPO&INPIT