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CN102452914A 一种防老剂6PPD废液的回收利用方法 无效 - 驳回

一种防老剂6PPD废液的回收利用方法
摘要：
防老剂6PPD废液MIBC催化脱氢制MIBK的回收利用方法，属于精细化工技术领域。防老剂6PPD废液经过减压蒸馏除去其中的高沸点物质，馏出物经过预热气化后经过装有铜锌系催化剂的固定床反应器，在反应压力0.05MPa～0.15MPa，反应温度180℃～270℃，液体空速0.12h-1～2.1h-1的反应条件下进行脱氢反应，反应后的物料经冷凝后直接用于防老剂6PPD的合成。MIBC在220℃～250℃，液体空速0.24h-1～0.60h-1的反应条件下，转化率均在90％以上，MIBK的选择性均在92％以上，回收后的物料MIBK含量最高可达94.94％。
摘要（英）：

A recycling method for preparing MIBK by catalytic dehydrogenation of an antioxidant 6PPD waste liquid MIBC belongs to the technical field of fine chemical industry. The method provided by the invention comprises the following steps of: carrying out decompression distillation on the antioxidant 6PPD waste liquid to remove substances of high boiling point, carrying out preheating gasification on a distillate, allowing the distillate to pass through a fixed bed reactor with a copper/zinc-based catalyst, carrying out a dehydrogenation reaction under the reaction conditions of the reaction pressure being 0.05-0.15MPa, the reaction temperature being 180-270 DEG C, the liquid space velocity being 0.12-2.1, and condensing the reacted materials. The condensed materials can be directly used for the synthesis of the antioxidant 6PPD. Under the reaction conditions of the temperature being 220-250 DEG C, the liquid space velocity being 0.24-0.60, the conversion rate of MIBC is over 90%, the selectivity of MIBK is over 92%, and the highest MIBK content of the recycled material can reach 94.94%.

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