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溶剂法精制磷脂酰胆碱的研究 总被引:4,自引:1,他引:4
为了提高磷脂产品中磷脂酰胆碱(PC)的含量,研究了以浓缩大豆磷脂为原料,采用丙酮和乙醇作溶剂,制备高含量磷脂酰胆碱.用丙酮脱油时,在料溶比为15:200、提取时间15 min、提取温度40℃的最佳脱油工艺条件下,得到丙酮不溶物含量为97.6%的中间产物--粉末磷脂.用乙醇提取富集其中的磷脂酰胆碱,通过单因子试验,研究了粉末磷脂与溶剂的比例、乙醇浓度、提取温度、时间和次数对PC含量和提取率的影响.试验结果表明,在乙醇浓度95%,固液比1:20,提取时间30 min,温度35℃,抽提次数2次的条件下,PC含量和提取率均较优.在最佳试验条件下,PC含量可提高到45.1%,提取率为62.0%. 相似文献
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以大豆毛油为原料,通过水化脱胶、丙酮去油和乙醇萃取等过程,提取了纯度较高的卵磷脂。较佳的工艺条件为:加水量为大豆毛油体积的5%,80℃水化脱胶70min,总量15倍粗磷脂体积的丙酮去油3次,95%乙醇在50℃萃取3次。 相似文献
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提高卵磷脂产率与质量的实验研究 总被引:2,自引:0,他引:2
为提高大豆卵磷脂的产率和质量,对生产工艺要点和参数进行了实验室小试,从中得出,在大豆卵磷脂生产时,注意原料的选择;浓缩之前进行油脚离心分离操作;萃取时注意乙醇液的浓度和丙酮液的PH值;脱色时注意吸附剂的选择以及浓缩蒸发;烘干工段注意真空度与温度的控制。 相似文献
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通过研究在工业条件下,如何利用水化豆油的油脚加工浓缩大豆磷脂,详细介绍了大豆磷脂的生产工艺过程,并对生产过程中的工艺条件控制进行了逐一的分析论述,同时对关键生产设备和操作安全注意事项进行了重点描述。 相似文献
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The effect of soybean lecithin addition on the iron‐catalyzed or chlorophyll‐photosensitized oxidation of emulsions consisting of purified canola oil and water (1:1, w/w) was studied based on headspace oxygen consumption using gas chromatography and hydroperoxide production using the ferric thiocyanate method. Addition levels of iron sulfate, chlorophyll, and soybean lecithin were 5, 4, and 350 mg/kg, respectively. Phospholipids (PLs) during oxidation of the emulsions were monitored by high performance liquid chromatography. Addition of soybean lecithin to the emulsions significantly reduced and decelerated iron‐catalyzed oil oxidation by lowering headspace oxygen consumption and hydroperoxide production. However, soybean lecithin had no significant antioxidant effect on chlorophyll‐photosensitized oxidation of the emulsions. PLs in soybean lecithin added to the emulsions were degraded during both oxidation processes, although there was little change in PL composition. Among PLs in soybean lecithin, phosphatidylethanolamine and phosphatidylinositol were degraded the fastest in the iron‐catalyzed and the chlorophyll‐photosensitized oxidation, respectively. The results suggest that addition of soybean lecithin as an emulsifier can also improve the oxidative stability of oil in an emulsion. 相似文献
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与现有的大豆加工预处理工艺作比较,着重阐述了ALCON熟化调理工艺所生产的大豆加工产品包括脱皮豆粕、物理精炼色拉油以及大豆卵磷脂在其应用领域中所具有的优势. 相似文献
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用m(大豆油)∶m(蓖麻油)=96∶4的植物油代替配方中三分之二的改性硅油,并以卵磷脂为油脂稳定剂,使用复合乳化剂进行乳化,制备出一种用于制浆黑液的消泡剂,其最佳比例为m(植物油)∶m(改性硅油)∶m(白炭黑)∶m(卵磷脂)∶m(乳化剂)=16∶8∶1.4∶0.8∶0.8;该消泡剂消泡、抑泡性能良好,并降低了生产成本。 相似文献
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Liliana N Ceci Diana T Constenla Guillermo H Crapiste 《Journal of the science of food and agriculture》2008,88(14):2460-2466
BACKGROUND: Wet gums produced during aqueous degumming of crude soybean oils are currently processed to produce lecithin or added to meals to increase their nutritive value for animal feed. Oils occluded in these gums are generally not recovered or processed. In this work, three methods to recover occluded oil and obtain lecithin from wet gums were assayed: direct extraction of oil with cold acetone (Method I), extraction after water elimination under vacuum (Method II) and by solvent partition with hexane/ethanol (Method III). RESULTS: Higher oil yields (up to 588 g kg?1 of occluded oil) were obtained when water was eliminated before extraction (Methods II and III). No significant differences were observed in lecithin yields between three methods (720–807 g kg?1 of dried gums). Recovered oils had acidity = 16.7–21.7 g kg?1 as oleic acid, TOTOX (total oxidation) values ≤ 8.82, unsaponifiable matter = 9.0–12.1 g kg?1, and Phosphorus = 87–330 mg kg?1. Lecithins obtained by Methods I, II and III hexane phase had the same purity level (610–691 g of total measured phospholipids kg?1). CONCLUSIONS: The occluded oil in soybean wet gums can be recovered, with quality and stability indexes compatible with their reinsertion in the productive process, by water elimination and extraction with acetone. Lecithins can be obtained with different phospholipid composition and diverse application fields. Copyright © 2008 Society of Chemical Industry 相似文献
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以大豆卵磷脂、胆固醇、吐温-80、DHA藻油为原料,探讨了薄膜超声法制备DHA藻油脂质体的工艺条件;分析了原料配比、温度、pH、超声时间、超声功率等因素对藻油脂质体包封率、粒径、电位的影响,对其氧化稳定性进行了初探,并研究其体外模拟消化行为。结果表明,藻油脂质体的最佳制备条件为:大豆卵磷脂与胆固醇比为3∶1(g/g)、大豆卵磷脂与藻油比为5∶1(g/g)、水化温度为40℃、pH为7.4、超声时间为120 s、超声功率350 W,在此条件下,所制备的脂质体呈椭圆球形,包封率为(91.55±0.4)%,粒径为(224.5±0.21)nm,PDI为0.224±0.003,电位(-32.4±0.03) mV;体外模拟小肠消化性能良好;室温放置一周后脂质体氧化稳定性良好。 相似文献
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本研究以大豆油体为原料,探究了不同乳化剂(大豆皂苷、大豆卵磷脂、大豆多糖、吐温80)对大豆基搅打稀奶油的粒径分布、粘度、乳状液稳定性、搅打起泡率、泡沫稳定性的影响。结果表明,不同乳化剂对大豆基搅打奶油的乳状液特性和搅打特性有一定影响。添加吐温80的大豆基搅打稀奶油有较小的粒径分布,ζ-电位为-30.3 mV,粘度比加其他大豆乳化剂的小,而且搅打起泡性最高,达到112.4%,但是泡沫稳定性只有2.1%。添加大豆乳化剂的大豆基搅打稀奶油具有类似的乳状液特性,但是添加大豆卵磷脂的大豆基搅打稀奶油比其他两种大豆乳化剂具有更高的膨胀率(134.5%),而添加大豆多糖的大豆基搅打稀奶油具有更好的泡沫稳定性(1.2%)。 相似文献