A comparative study was performed not only on the proton form of rho and PST-29, the first and second generations of the RHO family of embedded isoreticular zeolites, respectively, but also on their steam-dealuminated analogues, as catalysts for methylamines synthesis at 400 ^oC from ammonia and methanol. A similar yield in the sum of monomethylamine plus dimethylamine was observed for H-rho and H-PST-29. Steam treatment at 600 ^oC gave both zeolites an increase in catalyst lifetime, but which is much more apparent in H-PST-29, probably due to a larger decrease in strength of medium and strong acid sites, together with the mesopore formation. Dealumianted PST-29 showed a somewhat lower catalyst stability than H-mordenite, the former commercial catalyst for this reaction. However, it was found to exhibit a much higher yield in smaller methylamines and a comparable regenerability.

不仅对rhO和PST-29的质子形式（分别为第一代和第二代RHO嵌入式等孔网状沸石）的质子形式进行了比较研究，还对它们的蒸汽脱铝类似物作为甲胺在400℃合成的催化剂进行了比较研究。由氨和甲醇^制成的oC。对于H-rho和H-PST-29，单甲胺加二甲胺的总收率相近。600 ^o蒸汽处理C使两种沸石的催化剂寿命都增加，但在H-PST-29中更明显，这可能是由于中，强酸位点强度的较大降低以及中孔的形成。脱铝的PST-29的催化剂稳定性比H-丝光沸石稍低，后者是该反应的前商业催化剂。然而，发现在较小的甲胺中显示出高得多的产率和相当的可再生性。