| 摘要 |
1352550 Catalytic apparatus CHEMIE LINZ AG 19 April 1971 [21 April 1970] 27116/71 Heading B1F The perforations in tube 7 or tube 4 are graded so that combined area of the orifices, per sq. cm. at the level of the top quarter of the catalyst layer 3 is 10 to 25 times greater than the combined area of the orifices, per sq. cm., at the level of the remaining part of the catalyst layer, the orifices in the other tube being uniformly distributed and their combined area, per sq. cm. is at least as great as the combined area of the orifices, per sq. cm., in the said top quarter in the first tube. The apparatus is for ammonia catalytic synthesis, and the arrangements is for the uniform distribution of gas in the catalyst flowing from perforated tube 7 through catalyst layer 3 and through outer perforated tube 4. |
