A Novel Non-Phosgene Process for Polycarbonate Production from CO2: Green and Sustainable Chemistry in Practice
A Novel Non-Phosgene Process for Polycarbonate Production from CO2: Green and Sustainable Chemistry in Practice
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DOI：
10.1007/s10563-010-9093-5
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发表时间：
2010-09-01
影响因子：
3
通讯作者：
Komiya, Kyosuke
中科院分区：
文献类型：
--
作者：
Fukuoka, Shinsuke;Fukawa, Isaburo;Komiya, Kyosuke
本文重点介绍了旭化成株式会社成功开发并产业化的世界上第一个以二氧化碳为原料的无光气工艺，该工艺以环氧乙烷（EO）、副产二氧化碳和双酚a为原料，无废弃物和废水，高产能地生产出性能优良的高纯度单乙二醇（MEG）的高品质PC。单体生产中创新的反应精馏技术和熔融聚合中创新的重力利用无搅拌聚合反应器，使新工艺取得了成功。该工艺由3个步骤组成：由CO2和EO合成碳酸乙酯（EC），由EC和MeOH合成碳酸二甲酯（DMC）和MEG，由DMC和phh合成碳酸二苯酯（DPC）和MeOH。所有中间体都被循环利用。这种新型聚合反应器很好地克服了DPC与Bis-A熔体聚合时粘度极高的困难。副产物phh回收到单体工艺中。由于作为原料的二氧化碳被用作产品的主要链组分，因此也实现了二氧化碳排放量的减少（0.173t/PC 1t）。使用旭化成工艺的四个商业工厂（台湾：150,000吨/年，韩国：2个工厂，65,000吨/年，俄罗斯：65,000吨/年）目前已成功运行，沙特阿拉伯的26万吨/年工厂将于2010年启动。
This paper focuses on the world's first non-phosgene process using CO2 as starting material succeeded in development and industrialization by Asahi Kasei Corp. The Asahi Kasei Process enables high-yield production of high-quality PC having excellent properties and high-purity monoethylene glycol (MEG), starting from ethylene oxide (EO), by-produced CO2 and bisphenol-A without waste and waste water. The innovative reactive distillation technologies in the monomer production and the innovative gravity-utilized, non-agitation polymerization reactor in the melt polymerization, led the new process to success. The monomer process consists of 3 production steps, ethylene carbonate (EC) from CO2 and EO, dimethyl carbonate (DMC) and MEG from EC and MeOH, and diphenyl carbonate (DPC) and MeOH from DMC and PhOH. All intermediates are recycled. The new type polymerization reactor perfectly overcomes the difficulty based on the extremely high viscosity in the melt polymerization of DPC with Bis-A. The by-produced PhOH is recycled to the monomer process. The reduction of CO2 emissions (0.173t/PC 1t) is also achieved, because CO2 used as raw material is utilized as the main chain components of the products. Four commercial plants (Taiwan: 150,000 t/y, Korea: 2 plants of 65,000 t/y, Russia: 65,000 t/y) using the Asahi Kasei Process are now successfully operating, and the plant of 260,000 t/y in Saudi Arabia will start in 2010.