發(fā)布時(shí)間：2018-08-30 12:45

【摘要】：以環(huán)己烷、甲苯和1,2-二氯乙烷為候選共沸劑,采用非均相共沸精餾法從2-氯乙醇/水共沸物中分離出高濃度2-氯乙醇產(chǎn)品。通過(guò)ASPEN物性分析功能研究了不同共沸劑與2-氯乙醇/水體系形成共沸物的情況,并根據(jù)三元相圖進(jìn)行了過(guò)程的概念設(shè)計(jì)。在此基礎(chǔ)上,通過(guò)ASPEN模擬和優(yōu)化了采用不同共沸劑的分離過(guò)程的工藝條件,并以年度總費(fèi)用最小為依據(jù)選擇了甲苯為共沸劑,此時(shí)最優(yōu)工藝條件為:共沸塔總理論板數(shù)為20塊塔板,進(jìn)料位置在第8塊塔板,回流比為2;脫水塔總理論板數(shù)為30塊塔板,進(jìn)料位置在第20塊塔板,回流比為1.5。在此工藝條件基礎(chǔ)上進(jìn)行了實(shí)驗(yàn),結(jié)果表明2-氯乙醇產(chǎn)品純度可達(dá)到99%以上,且回收率在93.5%,實(shí)驗(yàn)結(jié)果與模擬結(jié)果能較好吻合,文中的研究可為2-氯乙醇-水分離的工業(yè)化提供參考。
[Abstract]:High concentration 2-chloroethanol was isolated from 2-chloroethanol / water azeotrope by heterogeneous azeotropic distillation with cyclohexane, toluene and 1-methylene dichloroethane as candidate azeotropic agents. The formation of azeotrope with different azeotropic agents and 2-chloroethanol / water system was studied by ASPEN physical property analysis, and the conceptual design of the process was carried out according to the ternary phase diagram. On this basis, the process conditions of the separation process with different azeotropic agents were simulated and optimized by ASPEN, and toluene was selected as azeotropic agent based on the minimum annual total cost. The optimum technological conditions are as follows: the total theoretical plate number of azeotropic tower is 20 trays, the feed position is at the 8th tray, the reflux ratio is 2, the total theoretical plate number of desiccant tower is 30 trays, and the feed position is 20 trays, the reflux ratio is 1.5. The results show that the purity of 2-chloroethanol is over 99%, and the recovery rate is 93.55.The experimental results are in good agreement with the simulation results. The study can provide a reference for the industrialization of 2-chloroethanol-water separation.
【作者單位】： 青島科技大學(xué)化工學(xué)院;
【基金】：國(guó)家自然科學(xué)青年基金資助項(xiàng)目(51506105)
【分類號(hào)】：TQ028.31;TQ223.3

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