碳酸二甲酯的合成工藝-文庫吧資料
2024-11-14 06:19本頁面
【正文】 有致命危險。 化學(xué)性質(zhì) 由于 DMC 分子中含有 CH3－、 CH3O－、 CH3O－ CO－、－ CO－等多種官能團(tuán)，因而具有良好的反應(yīng)活性，當(dāng) DMC 的甲基碳原子受到親核試劑攻擊時，烷基－氧鍵斷裂，導(dǎo)致甲基化產(chǎn)物生成，可代替硫酸二甲酯和氯甲烷作為甲基化劑。 1992 年被歐洲列為無毒產(chǎn)品，是 一種符合現(xiàn)代 “清潔工藝 ”要求的環(huán)保型化工原料 [1,2]。 關(guān)鍵詞 ： 氧化羰化甲醇；碳酸二甲酯；銅絡(luò)合物催化劑 本科畢業(yè)設(shè)計 II Abstract Diethyl carbonate (DMC) is an environmentally benign intermediation. It was paid widely attention that the research and development of a green process of synthesis of DMC. Although the process of producing DMC by oxidative carbonization of methanol in the presence of CuCl catalyst system has been industrial, some drawbacks, for instance the production of the byproduction HCl , in which not only caused to a leaking of Cl subsequence by the deactivate of the catalyst, but also a corrosion to the reactor, still need to be overe. In this work, a plex catalyst was prepared from CuCl and Schiff base additives and characterized by IR. The effects of different Schiff base additives were investigated. The results showed that high activity was exhibited in the presence of plex catalyst synthesized by Nmethylimidazole and CuCl， the methanol conversion was 5. 8%, DMC selectivity reached to % at 120 ℃ , pressure MPa, the reaction time 4 h. At the same condition, catalytic activity was further improved by twoligands plex CuCl system, methanol conversion is % (PVP: Nmethylimidazole: CuCl = 2:1:1).The result also showed that life of the CuCl/Schiff base additive catalysts was prolonged. Keywords: oxidative carbonization of methanol； DMC； C uprous chloride plex catalys 本科 畢業(yè)設(shè)計 III 目 錄 摘 要 .......................................................................................................................................... I Abstract ...........................................................................................................................................II 第一章 文獻(xiàn)綜述 ......................................................................................................................... 1 碳酸二甲酯的性質(zhì) ............................................................................................................... 1 物理性質(zhì) .................................................................................................................. 1 化學(xué)性質(zhì) ..................................................................................................................... 1 碳酸二甲酯的應(yīng)用 ................................................................................
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