非均相反應性蒸餾系統應用於環己醇製程之設計與控制

Design and Control of Heterogeneous Reactive Distillation Process for Cyclohexanol Synthesis

林媛翎(Yuan-Lin Lin)

指導教授 ： 黃孝平

國立臺灣大學/工學院/化學工程學研究所/碩士(2010年)

https://doi.org/10.6342/NTU.2010.02996

摘要

環己醇為目前高分子工業中大量被用做製造尼龍前驅物之原料，但現今工業使用之製程大部分有其安全性缺點，日本Asahi公司使用之一步水合反應製程雖改善安全性，但卻遭遇反應速率低之問題，且多操作單元步驟也使得經濟效益較低。本研究將以Asahi製程之一步水合反應整合至反應蒸餾系統為主題，探討熱力學性質對於該系統之影響，其中汽液液分相之三相共存為本系統之特點，並提出含雜質與不含雜質進料之反應蒸餾塔架構組態，針對最佳化設計找到合適的動態控制架構。第二部分為研究Steyer等人於2007年提出之兩步反應生產環己醇程序，並以Katariya等人於2009年提出之兩步反應系統架構為基礎，探討各設計變數於系統之影響；最後將討論整合性架構之可行性，其為包含兩反應段之單一反應蒸餾塔，此為首次提出之架構概念。

關鍵字

反應性蒸餾系統 ； 最佳化設計 ； 動態控制 ； 環己醇 ； 非均相

並列摘要

In the industrial market, Nylon 6, 6 is an important product and its production rate has reached 1.1 million tons per year by 1999. On the other hand, cyclohexanol has been used as a precursor in the synthesis of intermediates of Nylon 6, 6, i.e. the adipic acid and ε-caprolactam. An “Asahi process” to produce cyclohexanol from benzene by consecutive hydrogenation and one-step hydration steps has been commercialized since 1986. However, the one-step hydration step suffering from very low reaction rate and conversion is the bottleneck in the process. As a result, it is desirable to enhance this hydration step for better production. In this thesis, it is aimed to study the design and control of such a hydration step by employing reactive distillation. Moreover, the possibility of using reactive distillation in alternative two-step reactions is also studied in this thesis and a novel configuration, a two reaction zone in one reactive distillation column, is proposed.

並列關鍵字

reactive distillation ； design ； process control ； cyclohexanol ； heterogeneous

參考文獻

[1] Al-Arfaj, M. and W.L. Luyben, "Comparison of Alternative Control Structures for an Ideal Two-Product Reactive Distillation Column". Ind. Eng. Chem. Res., 2000. 39(9): p. 3298-3307.

[2] Al-Arfaj, M.A. and W.L. Luyben, "Effect of Number of Fractionating Trays on Reactive Distillation Performance". AlChE J., 2000. 46(12): p. 2417-2425.

[3] Al-Arfaj, M.A. and W.L. Luyben, "Control Study of Ethyl Tert-Butyl Ether Reactive Distillation". Ind. Eng. Chem. Res., 2002. 41(16): p. 3784-3796.

[4] Barbosa, D. and M.F. Doherty, "Design and Minimum-Reflux Calculations for Double-Feed Multicomponent Reactive Distillation-Columns". Chem. Eng. Sci., 1988. 43(9): p. 2377-2389.

[5] Barbosa, D. and M.F. Doherty, "Design and Minimum-Reflux Calculations for Single-Feed Multicomponent Reactive Distillation-Columns". Chem. Eng. Sci., 1988. 43(7): p. 1523-1537.