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十二烷基糖苷的合成及性能研究 总被引:1,自引:0,他引:1
采用直接苷化法在5.3—8Kpa的压力下,合成十二烷基糖苷。通过正交实验优化实验条件:催化剂与葡萄糖摩尔比0.005:l,正十二醇与葡萄糖摩尔比5:l,反应温度为120℃,催化剂为十二烷基苯磺酸,反应时间为3h,在此条件下,APG的产率为89.23%。并对产品的性能进行了测定。 相似文献
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叙述了以月桂醇、葡萄糖为原料,采用复合催化剂利用直接苷化法合成十二烷基葡萄糖苷,探讨了其名主要影响因素,得出适宜的反应条件为:反应压力为4.05kPa;反应温度为120℃;醇糖比为5:1,剂糖比为0.008:1。 相似文献
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在小试基础上,建立了一套反应釜体积为30 L直接苷化法合成烷基糖苷的实验室放大试验装置,主要包括反应系统、产品精制系统和自动控制系统3个部分。以医用无水葡萄糖和工业级正十二醇为原料进行了放大试验,考察了在实验室小试反应条件下制备十二烷基葡萄糖苷的影响因素。试验结果表明,反应釜的结构、原料量的变化及工艺条件的控制直接影响放大试验。提出了反应釜的放大依赖于经典的相似放大,采用夹套式搅拌釜,容积为30 L,高径比为1.2,材质为1Cr18Ni9Ti不锈钢釜,搅拌器型式采用6叶圆盘直叶涡轮式,电机采用无级变速;原料无水葡萄糖需过筛、脱水、预混合和分批投料;真空系统增设冷凝器和分离罐;温度等工艺参数采用自动化控制等。放大试验装置运行良好,所得产品经气相色谱仪分析与小试产品质量同等。 相似文献
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直接苷化法合成烷基糖苷的研究 总被引:1,自引:0,他引:1
本文以月桂醇、葡萄糖为原料,采用复合催化剂利用直接苷化法合成了十二烷基葡萄苷,探讨了其各主要影响因素,得出适宜的反应条件下为:反应压力为4.05KPa反应温度为120℃,醇糖比为5:1;剂糖比为0.008:1。 相似文献
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采用直接法合成了碳链长度为C10~C14的烷基糖苷(APG),用红外光谱对产品结构进行了表征,研究了烷基糖苷浓度及碳链长度对产品表、界面性质的影响。结果表明:随烷基糖苷浓度增大,水溶液表面张力、柴油-水界面张力降逐渐降低,而起泡性、泡沫稳定性逐渐增强。烷基糖苷碳链越长,临界胶束浓度(cmc)值越低;水溶液表面张力、柴油-水界面张力越低,起泡性、泡沫稳定性越强。基于烷基糖苷良好的表、界面性质,将其作为乳化剂制备成乳液,并与常见非离子表面活性剂OP-10制备的乳液进行了对比。烷基糖苷乳化性随浓度增大、碳链长度增长而增强;乳液微观形态表明不同碳链烷基糖苷形成乳状液稳定性、液滴均一性、填充性均优于OP-10稳定的乳液;稳定时间对乳液微观形态影响不大。所合成烷基糖苷中性能最优的为C14APG。 相似文献
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在小试基础上,建立了一套反应釜体积为30 L直接苷化法合成十二烷基糖苷的实验室放大实验装置。考察了放大实验装置制备十二烷基葡萄糖苷的工艺参数的稳定性。结果表明,采用实验室小试工艺条件很难生产出与小试同等质量的烷基糖苷。指出了原料葡萄糖的含水量、醇糖摩尔比(简称醇糖比,下同)、葡萄糖在醇中的分散性及工艺参数的稳定性等因素影响了放大实验。最后确定优化的工艺条件为:原料葡萄糖选用无水的、且需过筛、脱水、预混合和分批投料;醇糖比为6∶1;温度、压力等工艺参数采用自动化控制;真空系统增设冷凝器和分离罐等。工艺过程优化后放大实验装置运行良好,所得产品经气相色谱仪分析与小试产品质量同等。 相似文献
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《精细化工》2013,(2)
在小试基础上,建立了一套反应釜体积为30 L直接苷化法合成十二烷基糖苷的实验室放大实验装置。考察了放大实验装置制备十二烷基葡萄糖苷的工艺参数的稳定性。结果表明,采用实验室小试工艺条件很难生产出与小试同等质量的烷基糖苷。指出了原料葡萄糖的含水量、醇糖摩尔比(简称醇糖比,下同)、葡萄糖在醇中的分散性及工艺参数的稳定性等因素影响了放大实验。最后确定优化的工艺条件为:原料葡萄糖选用无水的、且需过筛、脱水、预混合和分批投料;醇糖比为6∶1;温度、压力等工艺参数采用自动化控制;真空系统增设冷凝器和分离罐等。工艺过程优化后放大实验装置运行良好,所得产品经气相色谱仪分析与小试产品质量同等。 相似文献
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Pandari Phani Kumar Peketi Ramesh Sanjit Kanjilal 《Journal of surfactants and detergents》2016,19(3):447-454
Sulfosuccination of castor oil-derived methyl ricinoleate and methyl 12-hydroxy stearate have been carried out in the present work. Synthesis involves malenization of secondary alcohol of methyl ricinoleate/methyl 12-hydroxy stearate followed by sulfonation of maleic monoester to generate double-headed dianionic surfactant with carboxylate and sulfosuccinate functionalities in the head group region. Various reaction conditions were optimized for maximum production of these two sulfosuccinates. Both compounds were evaluated for surface and detergency properties. The surface tension study indicated that the critical micelle concentration of sulfosuccinated methyl ricinoleate and methyl 12-hydroxy stearate is 0.26 and 0.11 mM, respectively. The detergency property of these two surfactants indicated that they were excellent in wetting time emulsification and Ca-tolerance. However, these two surfactants exhibited very poor foam height and foam stability. 相似文献
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In this work, a novel series of zwitterionic gemini surfactants with different hydrophobic tails were synthesized and characterized. The physico‐chemical properties of these products (such as surface tension, oil/water interfacial tension, foaming ability, and the wetting ability of paraffin‐coated sandstone) were fully studied. The CMC of the synthesized surfactants ranged from 2.17 × 10?4 mol L?1 to 5.36 × 10?4 mol L?1 and corresponding surface tension (γCMC) ranged from 26.49 mN m?1 to 29.06 mN m?1, which showed excellent efficiency among the comparison surfactants. All the products can reduce the interfacial tension to a relatively low level of about 0.1–1.0 mN m?1. Additionally, results from applying different hydrocarbons suggested that the synergy will be clearer and oil/water interfacial tension will be lower if the oil components are similar to the surfactants. Contact angle and foaming measurements indicated that the surfactants exhibited good wetting and foaming abilities. The results of oil flooding experiments using an authentic sandstone microscopic model showed that C‐12 and CA‐12 could effectively improve the displacement efficiency by 21–29 %. 相似文献
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以卤代烷烃、聚乙烯亚胺(PEI)、丙烯酰胺(AM)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)为原料,采用自由基聚合的方法制备了一种具有耐温抗盐性能的两亲聚合物型稠油降黏剂。利用红外光谱仪、显微镜、旋转滴界面张力仪、哈克流变仪、填砂管驱油实验研究了聚合物对稠油的乳化降黏及驱油能力。结果表明,当聚合降黏剂质量分数为1.00%时,油水质量比7:3条件下,春风油田稠油黏度由4753 mPa?s降至85 mPa?s,降黏率大于98%,油水界面张力由11.59 mN/m降低至0.06 mN/m。经过110℃老化24 h、矿化度1.45?105 mg/L条件下降黏率大于93%,具有较好的耐温耐盐性。在50℃、4.84?104 mg/L条件下,质量分数为0.50%的降黏剂溶液黏度为56 mPa?s,与市售部分水解聚丙烯酰胺HPAM溶液32 mPa?s的黏度相比,该聚合物降黏剂在矿化度条件下具有更好的水相增稠能力。填砂管驱油实验注降黏剂驱能够在水驱基础上提高采收率37.45%,表明该聚合物溶液可以通过降低稠油黏度和扩大波及体积提高稠油的采收率。 相似文献
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室内以丙烯酰胺、甲基丙烯酸烷基酯、季铵盐类阳离子单体和烷基丙烯酰胺疏水单体为原料,以过硫酸铵为引发剂,采用四元共聚法合成了一种耐温抗盐型稠油降黏剂DT-1,并对其降黏性能、耐温性能及抗盐性能进行了评价,并与其它市售降黏剂的降黏效果进行了比较。结果表明,降黏剂DT-1对渤海稠油和新疆稠油均具有良好的降黏效果,当其质量浓度为0.5%时,降黏率均可达到99%以上;降黏剂DT-1具有良好的耐温性能,经200℃老化24 h后,对两种稠油的降黏率仍能达到97%以上;降黏剂DT-1还具有良好的抗盐性能,在矿化度为100 000 mg·L~(-1)的NaCl盐水中对两种稠油仍能保持较高的降黏率;降黏剂DT-1对渤海稠油和新疆稠油的降黏效果优于其它市售降黏剂。 相似文献
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Synthesis,Characterization, and Performance of a Novel Polymeric Cationic Surfactant Based on Low Molecular Weight Chitosan and 3‐Chloro‐2‐Hydroxypropyl Dimethyl Dehydroabietyl Ammonium Chloride (CHPDMDHA) 下载免费PDF全文
Fan Qi Zhao‐sheng Cai Xue‐mei Zhu Shi‐bing Shang Li‐jun Pei 《Journal of surfactants and detergents》2015,18(3):463-470
A series of novel polymeric cationic surfactants based on low molecular weight chitosan (LWCS) and 3‐chloro‐2‐hydroxypropyl dimethyl dehydroabietyl ammonium chloride (CHPDMDHA), LWCS‐g‐CHPDMDHA, were obtained by the grafting modification of LWCS with CHPDMDHA as grafting agent. The structure of LWCS‐g‐CHPDMDHA was confirmed by FT‐IR and 1H NMR, and the degree of quaternizing substitution (DS) of LWCS‐g‐CHPDMDHA was determined according to the results of elemental analysis. The aggregation behavior and surface activities of LWCS‐g‐CHPDMDHA in aqueous solution were investigated by transmission electron microscopy (TEM) and determination of surface tension, respectively. The experimental results showed that the DS and molecular weight (Mw) of LWCS have significant influence on the critical micelle concentrations (CMC) and the surface tensions at the CMC (γcmc). The shape of aggregates changed with the variation of concentration of LWCS‐g‐CHPDMDHA in aqueous solution. When the LWCS‐g‐CHPDMDHA was utilized as an emulsifier, the increase of DS of LWCS‐g‐CHPDMDHA and Mw of LWCS were favorable for improving the stability of emulsions composed of water and benzene. 相似文献
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水溶性分散剂苯乙烯——马来酸酐(SMA)的合成及应用性能研究 总被引:3,自引:0,他引:3
通过溶液聚合的方法合成了苯乙烯--马来酸酐型(SMA)水溶液分散剂,用乌式粘度计对共聚物进行了表征,并用吊环法测定了共聚物的表面张力,当其水溶液浓度为0.3g/L时,表面张力下降为37.74mN/m,并用分光光度计表征其分散性能。 相似文献