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US6004452A Process for converting hydrocarbon feed to high purity benzene and high purity paraxylene 失效
将烃进料转化为高纯度苯和高纯度对二甲苯的方法

Process for converting hydrocarbon feed to high purity benzene and high
purity paraxylene
摘要:
A process is provided for producing high purity benzene and high purity paraxylene from a hydrocarbon feed. In one aspect, the process comprises: (a) reforming a hydrocarbon feed using either a monofunctional catalyst or a bifunctional catalyst to provide one or more reformate streams; (b) fractionating the reformate stream to provide a toluene stream, a benzene stream, and a xylene stream; (c) subjecting the toluene stream to disproportionation; (d) purifying the benzene stream by extraction followed by distillation to provide a high purity benzene product; and (e) purifying the xylene stream by simulated moving bed countercurrent adsorption followed by crystallization to provide a high purity paraxylene product.
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