【摘要】：有機(jī)氯化物生產(chǎn)中產(chǎn)生的副產(chǎn)鹽酸,處理難度高,處理量大,且現(xiàn)有處理方法成本較高。針對(duì)這一問題,本文提出以副產(chǎn)鹽酸和乙二醇為原料生產(chǎn)2-氯乙醇,進(jìn)而生產(chǎn)飼料添加劑--氯化膽堿的副產(chǎn)鹽酸處理路線。研究以連續(xù)反應(yīng)精餾方式生產(chǎn)2-氯乙醇,分析了反應(yīng)體系中各組分的物性,并根據(jù)常壓下2-氯乙醇/水的共沸組成,確定了副產(chǎn)鹽酸濃度應(yīng)為28.42%,通過連續(xù)化小試驗(yàn)證了本方案的可行性。為適應(yīng)市場(chǎng),增強(qiáng)產(chǎn)品競(jìng)爭(zhēng)力,考慮了裝置產(chǎn)品的多元化,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Aspen Plus進(jìn)行了過程的概念設(shè)計(jì),選擇了最優(yōu)共沸劑甲苯,并根據(jù)年度總費(fèi)用最小對(duì)流程進(jìn)行了優(yōu)化,在模擬結(jié)果基礎(chǔ)上進(jìn)行了連續(xù)化的小試,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)果相吻合,為2-氯乙醇-水分離的工業(yè)化提供了參考。以2-氯乙醇/水共沸物和三甲胺水溶液為原料,進(jìn)行了自催化反應(yīng)制取氯化膽堿的實(shí)驗(yàn)。結(jié)果表明:在50℃下反應(yīng)4~5h,得到氯化膽堿質(zhì)量分?jǐn)?shù)約為35%的水溶液,并在此基礎(chǔ)上進(jìn)一步研究了氯化膽堿水溶液的脫色和濃縮條件。最后根據(jù)2-氯乙醇、氯化膽堿的實(shí)驗(yàn)與模擬,擬定出鹽酸生產(chǎn)氯化膽堿的工藝流程。
[Abstract]:The by-product salt acid produced in the production of organic chloride is difficult to treat, the treatment capacity is large, and the cost of the existing treatment methods is high. In order to solve this problem, the by-product hydrochloric acid treatment route of producing 2-chloroethanol from by-product hydrochloric acid and ethylene glycol, and then producing feed additive choline chloride, was put forward in this paper. The production of 2-chloroethanol by continuous reactive distillation was studied. the physical properties of each component in the reaction system were analyzed. According to the azeotropic composition of 2-chloroethanol / water at atmospheric pressure, the concentration of hydrochloric acid as by-product was determined to be 28.42%. The feasibility of the scheme is verified by a continuous small scale test. In order to adapt to the market and enhance the competitiveness of the product, considering the diversification of the product, the high concentration 2-chloroethanol product was separated from 2-chloroethanol / water azeotrope by heterogeneous azeotropic distillation method, and the conceptual design of the process was carried out by Aspen Plus. The optimal azeotrope toluene was selected and the process was optimized according to the minimum annual total cost. On the basis of the simulation results, a continuous small scale test was carried out. The results showed that the purity of 2-chloroethanol product could reach more than 99%. The recovery rate is 93.5%. The experimental results are in good agreement with the simulation results, which provides a reference for the industrialization of 2-chloroethanol-water separation. The preparation of choline chloride by autocatalytic reaction was carried out from 2-chloroethanol / water azeotrope and trimethylamine aqueous solution. The results showed that the aqueous solution with a mass fraction of choline chloride of about 35% was obtained by reaction at 50 鈩，

本文編號(hào)：2495105