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一．催化剂的制备将盛一定量沙土的铁（铝）锅放在蜂窝炉（煤气灶）上加热，同时不断用铁钩子翻动（切忌用炊帚、管帚等植物制品翻动，以克里面混进碳及易燃有机物）待里面的水份蒸干至沙土呈“微沸”状态，可取下铁锅自然冷却后即能使用．此时炒过的沙土略呈淡棕色．整个加热?
one. The preparation of the catalyst will heat the iron (aluminum) pot with a certain amount of sand on the honeycomb stove (gas stove), and at the same time continue to use the iron hooks to flip (don’t use the plant products such as rakes, pipe rakes, etc. And flammable organics) The water inside is evaporated to dryness until the sand is in a “micro-boiling” state, and it can be used after it is naturally cooled. The fried sand was light brown. Whole heating?