发明名称 |
Extractive Distillation Process For Benzene Recovery |
摘要 |
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.
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申请公布号 |
US2013228447(A1) |
申请公布日期 |
2013.09.05 |
申请号 |
US201213410286 |
申请日期 |
2012.03.01 |
申请人 |
WU KUANG-YEU;LIN TZONG-BIN;LEE FU-MING;CHIU TSUNG-MIN;LEE JENG-CHENG;AMT INTERNATIONAL, INC.;CPC CORPORATION, TAIWAN |
发明人 |
WU KUANG-YEU;LIN TZONG-BIN;LEE FU-MING;CHIU TSUNG-MIN;LEE JENG-CHENG |
分类号 |
B01D3/40 |
主分类号 |
B01D3/40 |
代理机构 |
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