Are there cycloalkyl lubricant hydrogenated products with good light stability that do not use precious metal catalysts?
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Would it be better to increase the pressure? Light stability, oxygen stability, etc
Maybe. I would like to ask: if post-refining, that is, the second-stage hydrogenation, is carried out using precious metal catalysts such as Pt and Pd, it’s too expensive. Has anyone used Ni catalysts? In some articles, I read that Lyondell used precious metals in the early stages, Ni in the intermediate stages, and various precious metals in later stages. Does anyone know why? ?