| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely find out a reaction tube of which the pressure loss is out of an allowable range, from among a number of reaction tubes in a short time and a little efforts. <P>SOLUTION: While maintaining the illuminance of one terminal part at 50 lux or more with an illumination such as a fluorescent lamp 22 disposed at one terminal side of a reaction tube 12, the inside of the reaction tube 12 is watched from another terminal side, and the packing situation of solid catalyst in the reaction tube 12 is ascertained. According to the method, the reaction tube of which the pressure loss is out of an allowable range, namely, in which removal of a used catalyst or packing of a new catalyst is forgotten in catalyst exchange can be found out. <P>COPYRIGHT: (C)2013,JPO&INPIT |
