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铂重整工艺中，残留催化剂含碳量较高，催化剂在卸出过程中受到污染。密度分离法有助于回收受污染的催化剂，具有较大的经济价值。
In the platinum reforming process, the residual catalyst has a high carbon content and the catalyst is contaminated during discharge. Density separation helps to recycle contaminated catalysts and has great economic value.