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    • 1. 发明申请
    • EXTRACTIVE DISTILLATION PROCESS FOR RECOVERING AROMATICS FROM PETROLEUM STREAMS
    • 从石油回收回收芳烃的提取蒸馏工艺
    • US20090038991A1
    • 2009-02-12
    • US11837459
    • 2007-08-10
    • KUANG YEU WUTSUNG-MIN CHIUTZONG-BIN LINHUNG-CHUNG SHENYU-MING WUTUNG-HSIUNG KUO
    • KUANG YEU WUTSUNG-MIN CHIUTZONG-BIN LINHUNG-CHUNG SHENYU-MING WUTUNG-HSIUNG KUO
    • C10G51/02B01J8/04
    • B01D3/40C10G7/08
    • The present invention relates to a process for recovering polar hydrocarbons from non-polar hydrocarbons, such as aromatics from non-aromatics, naphthenes from paraffins and isoparaffins, or olefins from paraffins and isoparaffins, in feed mixtures containing at least a measurable amount of heavier hydrocarbons. According to the invention, an improved extractive distillation (ED) process is disclosed for recovering aromatic hydrocarbons including benzene, toluene, and xylenes (BTX aromatics) from the C6-C8 petroleum streams containing at least a measurable amount of C9+ hydrocarbons.The invention also relates to an improved ED process for recovering mainly benzene and toluene from the C6-C7 petroleum streams containing at least a measurable amount of C8+ hydrocarbons. This invention is further directed toward the regeneration and recovery of the ED solvent utilized to recover and purify the aromatic hydrocarbons from the petroleum stream containing at least a measurable amount of hydrocarbons heavier than intend feedstock.
    • 本发明涉及一种从非极性烃中回收极性烃的方法,例如来自非芳族化合物的芳族化合物,来自烷烃和异链烷烃的环烷烃,或来自链烷烃和异链烷烃的烯烃在含有至少可测量量的较重烃 。 根据本发明,公开了一种改进的萃取蒸馏(ED)方法,用于从含有至少可测量量的C 9+烃的C6-C8石油流中回收包括苯,甲苯和二甲苯(BTX芳族化合物)的芳烃。 本发明还涉及一种改进的ED方法,主要从含有至少可测量量的C8 +烃的C6-C7石油流中回收苯和甲苯。 本发明进一步涉及用于回收和纯化来自含有至少可测量量的比目标原料重的烃的石油流中的芳烃的ED溶剂的再生和回收。
    • 5. 发明申请
    • Extractive Distillation Process For Benzene Recovery
    • 萃取蒸馏工艺用于苯回收
    • US20130228447A1
    • 2013-09-05
    • US13410286
    • 2012-03-01
    • Kuang-Yeu WuTzong-Bin LinFu-Ming LeeTsung-Min ChiuJeng-Cheng Lee
    • Kuang-Yeu WuTzong-Bin LinFu-Ming LeeTsung-Min ChiuJeng-Cheng Lee
    • B01D3/40
    • B01D3/40C07C7/08C07C15/04
    • Recovering high purity benzene from hydrocarbon feedstock containing aromatics and non-aromatics is implemented by simple and low-cost modifications to conventional extractive distillation columns (EDCs). Methyl cyclohexane (MCH) that is generated through non-selective hydrogenation of toluene in hydrodesulfurization (HDS) units is a major contaminant in benzene production. To meet MCH specifications, often times the extractive distillation (ED) process for recovering purified benzene is operated with excessive benzene loss to the overhead raffinate stream, producing a lower quality non-aromatic product. Novel techniques (1) remove operational constrictions of the HDS unit on MCH production, thus lengthening the catalyst life and (2) allow the EDC to drive essentially any amount of MCH away from the bottom benzene product without concerns with benzene loss to the overhead raffinate stream and (3) recover benzene from the overhead raffinate stream to upgrade the quality of non-aromatic product and increase the benzene product recovery.
    • 通过对常规萃取蒸馏塔(EDC)的简单且低成本的改进来实现从芳族化合物和非芳族化合物的烃原料中回收高纯度苯。 通过在加氢脱硫(HDS)单位中甲苯的非选择性氢化产生的甲基环己烷(MCH)是苯生产中的主要污染物。 为了满足MCH规范,通常多次用于回收纯化苯的萃取蒸馏(ED)方法对顶部萃余液流具有过量的苯损失,产生较低质量的非芳族产物。 新技术(1)消除了HDS单元在MCH生产中的操作限制,从而延长了催化剂寿命,(2)允许EDC将基本上任意数量的MCH从底部苯产品中驱出,而不考虑苯损失到塔顶残液 流和(3)从塔顶残液流回收苯,提高非芳香族产品的质量,提高苯产品回收率。