Patent ID: 6514313
Filing Date: 2003-02-04
Classification: B01D,C23C,C30B

Abstract:
A gas purification method, comprising the steps of:connecting a gas purifier inlet to a supply of gas which is to be purified of contaminants; passing said gas through said purifier while connecting an outlet of the gas purifier to a vent outlet for a predetermined time period sufficient to condition the purifier; varying the gas flow rate through the gas purifier dependent on whether the purifier is connected to the vent outlet or process inlet by connecting a mass flow controller in line with the purifier and controlling the mass flow controller to supply gas at a higher flow rate while the purifier outlet is connected to the vent outlet and reducing the gas flow rate when the purifier outlet is connected to the process inlet; and closing the vent outlet and connecting the gas purifier outlet to a process inlet using the purified gas after the purifier is conditioned; whereby said gas is purified of said contaminants without significant deterioration in activity of said gas.