本文選題：開關(guān)溶劑 + N�。� 參考：《揚州大學(xué)》2017年碩士論文

【摘要】：本文研究的離子強度智能開關(guān)溶劑體系是在水中加入N,N-二甲基環(huán)已胺(DMCA)或三乙胺(TEA)。N,N-二甲基環(huán)已胺和三乙胺都是是疏水性叔胺,在分子狀態(tài)時,疏水性叔胺不溶于水,而向其水溶液中通入C02后變?yōu)殡x子形式的碳酸氫鹽([HC03]-),與水形成均相體系,溶液的離子強度大大增加。當(dāng)向體系中通入N2或加熱的情況下[HCO3]-又會變?yōu)榘?溶液的離子強度幾乎接近于零。正是這種離子強度的可逆性,使得離子強度智能開關(guān)溶劑在有機(jī)物-水體系中回收水溶液中的有機(jī)物質(zhì)、鹽析萃取等方面有著較為廣闊的應(yīng)用前景。離子強度智能開關(guān)溶劑各項物性、相平衡等熱力學(xué)數(shù)據(jù)的缺乏使其在分離過程中的實際應(yīng)用遇到一些困難,本文主要研究了離子強度智能開關(guān)溶劑的物化性質(zhì)及離子強度智能開關(guān)溶劑-有機(jī)物-水體系的液-液相平衡,為其在工業(yè)中的應(yīng)用提供了基礎(chǔ)數(shù)據(jù)和理論依據(jù),具有較高的理論價值和工業(yè)應(yīng)用價值。具體完成了以下幾個方面的工作:(1)采用重量法測定DMCA-水體系吸收C02后,生成[DMCAH][HC03](N,N-二甲基環(huán)已胺碳酸氫鹽)的速率。使用烏氏粘度計,振動式比重計測定水相的粘度和密度兩種基本物性,并用核磁共振C13譜進(jìn)行表征�？疾炝藴囟取MCA與水的體積比等因素對DMCA吸收C02速率的影響。將實驗測得的粘度和密度數(shù)據(jù)用Vogel-Tamman-Fulcher方程進(jìn)行關(guān)聯(lián),平均相對偏差(ARD)和標(biāo)準(zhǔn)偏差(SD)值都較小,效果較好。再用實驗測得的密度數(shù)據(jù)計算出[DMCAH][HC03]溶液的表觀摩爾體積。(2)選用DMCA和TEA兩種離子強度親水性可切換開關(guān)溶劑,測定了 298.15K、303.15K、308.15K三個溫度下四個三元體系(水+ DMCA +甲苯;水+ TEA 十甲苯;水+[DMCAH][HC03]+甲苯;水+[TEAH][HC03](三乙胺-碳酸氫鹽)+甲苯)液-液相平衡數(shù)據(jù),繪制相應(yīng)的三元液-液平衡相圖。選用Othmer-Tobias方程檢驗了實驗數(shù)據(jù)的可靠性,該方程對四個三元體系在不同溫度下的液-液相平衡數(shù)據(jù)關(guān)聯(lián)精度R2均接近于1,證實了所測定實驗數(shù)據(jù)的準(zhǔn)確性。采用NRTL液-液相平衡模型對四個三元體系進(jìn)行關(guān)聯(lián),得到的計算值與實驗值吻合,效果較好。該實驗數(shù)據(jù)為離子強度智能開關(guān)溶劑分離回收水溶液中的有機(jī)物提供了熱力學(xué)基礎(chǔ)。(3)以TEA作為智能離子強度開關(guān)溶劑,測定298.15K、303.15K、308.15K三個溫度下兩個三元體系(TEA十水+1,3-二氧五環(huán);[TEAH][HC03]+水+1,3-二氧五環(huán))液-液相平衡數(shù)據(jù),繪制相應(yīng)的三元液-液平衡相圖。選用Othrmer-Tobias方程對實驗數(shù)據(jù)進(jìn)行可靠性驗證,回歸得到的線性相關(guān)系數(shù)均大于0.99,驗證了數(shù)據(jù)的可靠性。再用NRTL液-液相平衡模型進(jìn)行關(guān)聯(lián),實驗值與模擬值的均方根偏差(RMSD)比較小,說明了關(guān)聯(lián)效果較好,精確度比較高,也為親水性可切換離子強度智能開關(guān)溶劑的鹽析萃取工藝提供了理論基礎(chǔ)。
[Abstract]:In this paper, the ionic strength intelligent switch solvent system is to add N, N- two methyl cyclohexylamine (DMCA) or three ethylamine (TEA).N, N- two methyl cyclohexylamine and three ethylamine are hydrophobic tertiary amines, and at molecular state, hydrophobic tertiary amines are insoluble in water, and they turn into the water solution into ionic form of the bicarbonate ([HC03]-) in the water solution. In the homogeneous system with water, the ionic strength of the solution increases greatly. When N2 or heating is used in the system, the [HCO3]- becomes amines, and the ionic strength of the solution almost approaches zero. It is the reversibility of the ionic strength to reclaim the organic matter in the aqueous solution by the ionic strength intelligent switch solvent. There is a broad application prospect in salting out extraction. The lack of thermodynamics data such as ionic strength intelligent switch solvent and phase equilibrium make it difficult to apply in the process of separation. In this paper, the physical and chemical properties of ionic strength intelligent switch solvent and the solvent of ionic strength intelligent switch are studied in this paper. The liquid liquid equilibrium of the material water system provides basic data and theoretical basis for its application in industry. It has high theoretical value and industrial application value. The following work has been completed: (1) the determination of C02 by the gravimetric method for the absorption of DMCA- water system to [DMCAH][HC03] (N, N- two methyl cyclohexane bicarbonate) Rate. Using the wulson viscometer, two basic properties of the viscosity and density of water phase are measured by a vibratory hydrometer, and the C13 spectra are used to characterize the water. The influence of the temperature, the volume ratio of DMCA and the volume of water on the C02 rate of DMCA absorption is investigated. The viscosity and density measured by the experiment are correlated with the Vogel-Tamman-Fulcher equation. The relative deviation (ARD) and the standard deviation (SD) value are small and the effect is better. The apparent molar volume of [DMCAH][HC03] solution is calculated with the density data obtained by the experiment. (2) four three elements (water + DMCA + toluene) under the three temperatures of 298.15K, 303.15K and 308.15K are determined by using two kinds of ionic strength hydrophilic switching solvents of DMCA and TEA; Water + TEA ten toluene, water +[DMCAH][HC03]+ toluene, water +[TEAH][HC03] (three ethylamine - bicarbonate) + toluene, liquid liquid equilibrium data, draw a corresponding three element liquid liquid equilibrium phase diagram. The reliability of the experimental data is tested by using the Othmer-Tobias equation, and the equation is related to the liquid liquid equilibrium data of the four three body systems at different temperatures. The degree R2 is close to 1, which confirms the accuracy of the measured data. The NRTL liquid liquid equilibrium model is used to relate the four three element systems. The calculated values are in good agreement with the experimental values. The experimental data provide a thermodynamic basis for the organic matter in the solvent separation and recovery of the aqueous solution by the ionic strength intelligent switch. (3) TEA as the basis. For the intelligent ion intensity switch solvent, two three elements (TEA ten water +1,3- two oxygen ring, [TEAH][HC03]+ water +1,3- two oxy ring) liquid liquid equilibrium data were measured at three temperatures of 298.15K, 303.15K and 308.15K, and the corresponding liquid liquid equilibrium phase diagram was drawn. The reliability of the experimental data was verified by the Othrmer-Tobias equation, and the regression was obtained. The linear correlation coefficient is more than 0.99, which validates the reliability of the data. The correlation is used by the NRTL liquid liquid equilibrium model. The experimental value is smaller than the mean square deviation (RMSD) of the simulated value. It shows that the correlation effect is better and the accuracy is higher. It also provides a reasonable solution for the salting out extraction process of the hydrophilic switching ionic strength intelligent switch solvent. On the basis.
【學(xué)位授予單位】：揚州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O642.42

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