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月桂酸二乙醇酰胺磷酸酯盐的合成及性质 总被引:5,自引:0,他引:5
以月桂酸二乙醇酰胺为原料,P2O5为磷酸化剂,经酯化、水解和中和反应合成了月桂酸二乙醇酰胺磷酸酯盐,确定了最佳合成条件。结果表明:当n(酰胺):n(P2O5)=2:1,温度为70℃的条件下反应3h,并在80℃下水解2h,况酯化率为90.32%,单酯含量为57.53%。通过测定其表面性质,证实该产品具有良好的表面活性。 相似文献
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介绍了棉油酸二乙醇酰胺的合成方法 ,研究了酯化、缩合反应的条件和工艺。结果表明 :所合成的棉油酸二乙醇酰胺是一种性能优良的非离子表面活性剂。 相似文献
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以月桂酸、N,N-二甲基乙醇胺和N,N-二乙基乙醇胺为原料,亚磷酸为催化剂,通过酯化反应合成月桂酸二甲胺基乙醇酯与月桂酸二乙胺基乙醇酯。月桂酸二甲胺基乙醇酯合成的较优条件为:月桂酸与N,N-二甲基乙醇胺的摩尔比为1∶1.5,催化剂用量0.2%,回流循环水温60℃,反应温度170℃,在此条件下转化率可达95.91%。月桂酸二乙胺基乙醇酯合成的较优条件为:月桂酸与N,N-二乙基乙醇胺的摩尔比为1∶1.25,催化剂用量0.2%,回流循环水温80℃,反应温度150℃,在此条件下,转化率可达98.65%。 相似文献
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Binary mixtures of cocoa butter and lauric fats have widespread use in chocolates and confections, yet incompatibilities between these fats can present formulation and processing constraints. This study examined the phase behavior and crystallization kinetics of cocoa butter-lauric fat model systems and chocolate-lauric fat blends. Solid fat content (SFC) profiles and isosolid diagrams confirmed eutectic and diluent interactions, indicating a softening of cocoa butter by lauric fat addition. Crystallization kinetics of model systems adhered to an exponential growth model. High lauric fat levels delayed crystal growth and reduced equilibrium SFC of cocoa butter. Coconut and palm kernel oils altered the solidification mechanisms of cocoa butter to a greater extent than fractionated palm kernel oil. Chocolate systems displayed multi-step crystal growth that contrasted with the exponential growth observed in the model systems. At high lauric fat levels (30%), crystallization onset was significantly lengthened. Blends with high lauric fat contents showed low \(G_{{\text {max}} }^{\prime }\) and did not achieve final equilibrium after 60 min of cooling, indicating incomplete crystallization. 相似文献
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N,N’-双月桂酰基乙二胺二乙酸钠合成方法的改进 总被引:1,自引:0,他引:1
对表面活性剂N,N’-双月桂酰基乙二胺二乙酸钠的合成方法进行了改进。以月桂酸、乙二胺和氯乙酸为原料制得N,N’-双月桂酰基乙二胺二乙酸钠。考察了反应温度、反应时间、原料配比对中间体合成的影响。结果表明,N,N’-双月桂酰基乙二胺(中间体Ⅰ)的最佳合成条件是:n(月桂酰氯)∶n(乙二胺)=3.5∶1,反应温度70℃,反应时间1 h,产率为96.94%;N,N’-双月桂酰基乙二胺二乙酸(中间体Ⅱ)的最佳合成条件是:n(氯乙酸)∶n(中间体Ⅰ)=3∶1,反应温度65℃,反应时间12 h,产物产率为53.38%。产物结构用红外光谱、元素分析等方法进行了表征。 相似文献
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Hen‐Yi Ju Cheng‐Kang Yang Yue‐Horng Yen Chwen‐Jen Shieh 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2009,84(1):29-33
BACKGROUND: Hexyl laurate has been applied widely in cosmetic industries and is synthesized by chemical methods with problems of cost, environmental pollution, and by‐products. In this study, Lipozyme® IM77 (from Rhizomucor miehei) was used to catalyze the direct‐esterification of hexanol and lauric acid in a solvent‐free system by utilizing a continuous packed‐bed reactor, wherein the aforementioned difficulties could be overcome. Response surface methodology (RSM) and three‐level‐three‐factor Box‐Behnken design were employed to evaluate the effects of synthesis parameters, such as reaction temperature (45–65 °C), mixture flow rate (0.25–0.75 mL min?1) and concentration of lauric acid (100–300 mmol L?1) on the production rate (µmol min?1) of hexyl laurate by direct esterification. RESULTS: The production rate was affected significantly by the mixture flow rate and lauric acid concentration. On the basis of ridge‐max analysis, the optimum synthesis conditions for hexyl laurate were as follows: 81.58 ± 1.76 µmol min?1 at 55 °C, 0.5 mL min?1 flow rate and 0.3 mol L?1 lauric acid. CONCLUSION: The lipase‐catalyzed synthesis of hexyl laurate by Lipozyme® IM‐77 in a continuous packed‐bed bioreactor and solvent‐free system was successfully developed; optimization of the reaction parameters was obtained by Box–Behnken design and RSM. Copyright © 2008 Society of Chemical Industry 相似文献
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以系列金属氯化物为催化剂,月桂酸和正丁醇为原料,催化合成月桂酸正丁酯,并利用正交法探索最佳反应条件。通过实验探索得最佳反应条件为:配料比(月桂酸与正丁醇的物质的量比)1∶8,六水合三氯化铁作催化剂,反应时间为3 h,收率为80.95%。 相似文献
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The Interaction between Lauric and Stearic Acid and the Ni-NiO Catalyst System The reactivity of the Ni-NiO catalytic system of following degrees of reduction: 0, 35–65 and 100% Ni with the pure chemical quality lauric and stearic acids during the catalyst passivating conditions 75–115°C were followed in the time period 0–100 hours. The quantity of interaction product of nickel salts of fatty acids in the catalyst is controlled both of the initial reactivity of the Ni-NiO system with the fatty acids and of the kinetics of the zero reaction order. Although the lauric acid is expressively more reactive than the stearic acid, the activity of the in this way prepared catalysts tested in hydrogenation of free fatty acids did not show significant differences. 相似文献
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以正硅酸四乙酯(TEOS)为硅胶(SG)的来源,将硅胶用丁二酸(SA)功能化之后,采用溶胶-凝胶法负载活性组分醋酸锌(ZnA),制备功能化硅胶负载醋酸锌催化剂(SG-SAZnA);并用红外光谱(IR)及X射线衍射法(XRD)对该催化剂进行了表征;通过用该催化剂催化合成月桂酸甲酯的实验,考察了反应时间、反应温度、醇酸摩尔比、催化剂用量对反应酯化率的影响,探讨了该催化剂的催化性能.结果表明,在醇酸摩尔比为7:1,催化剂用量为酸质量的5%,75℃下反应1.5 h,酯化率最高达75%;催化剂重复使用5次后,月桂酸的酯化率仍可达73.8%. 相似文献
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采用浸渍法制备了负载型ZrOCl2•8H2O/USY催化剂,并用XRD、SEM等对其进行表征。以ZrOCl2•8H2O/USY为催化剂考察了其催化月桂酸与月桂醇酯化反应的催化性能。以月桂酸的转化率为考察指标,讨论了催化剂活性以及各种因素如催化剂用量、反应溶剂、反应时间对该酯化反应酯化转化率的影响。实验结果表明,月桂酸与月桂醇的摩尔比为1:1,30 %(质量分数)ZrOCl2•8H2O/USY为催化剂,反应溶剂为氯代苯,当催化剂用量为反应物总质量的5.0 %,溶剂回流条件下反应时间为16 h,月桂酸的转化率达到95.2 %。 相似文献