Frishauf, Holtz, Goodman & Woodward
Method of foreseeing break-through in gas adsorbing apparatus
 In a method of foreseeing or detecting break-through of a gas in a gas-adsorbing apparatus utilizing a gas-adsorbing material, the improvement in which the break-through is foreseen or detected by detecting a weight of the gas adsorbed by the gas-adsorbing material. When the gas to be detected contains boron trichloride, the break-through can be foreseen or detected by detecting a color change of a detecting agent such as 1,1'-dianthrimide or a combination of caraminic acid, hydrochloric acid and sulfuric acid, the detecting agent being arranged in a lower stream following the gas-adsorbing material and which shows a color change upon contact with boron trichloride. 
Ube Industries, Ltd.
B G
B01D G01N
inventional inventional
Kyouhei Yoshio Hiroyuki Masao Mamoru Hisayuki
Ohizumi Nishimura Fukushima Miura Miyamoto Mizuno