共查询到20条相似文献,搜索用时 31 毫秒
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Wei‐guo Zhang De‐cheng Zhang Xiao‐yuan Chen 《European Journal of Lipid Science and Technology》2012,114(3):352-356
The objective of this study was to extract the oil from Camellia oleifera seed kernels by aqueous enzymatic oil extraction (AEOE). We describe a novel process for extraction of tea oil preceded by tea saponin extraction from C. oleifera seed kernels. The extraction efficiency obtained with microwave‐assisted extraction (MAE) is very high, which the recovery yield is up to 83% in 30 s and the saponins in camellia seed kernels can be completely removed by the second MAE. Moreover, an important step in the process development has been the pretreatment by microwave puffing of camellia seed kernel residues followed by AEOE increased oil extraction yield from 53% to 95%, which will is comparable to hexane oil extraction yields from plant materials. 相似文献
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茶籽皂素的提取及应用研究 总被引:4,自引:0,他引:4
介绍了茶籽皂素在农业、医药、日用化工、养殖、建筑等领域的应用研究,重点综述了近些年从茶籽饼中提取茶皂素的各种提取工艺及其特点,并就茶皂素目前的生产和应用情况提出了一些看法和急需解决的问题。 相似文献
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以油茶饼粕为原料,采用乙醇提取-丙酮沉淀法对茶皂素进行提取分离。以茶皂素纯度和得率为考察指标,对乙醇体积分数、液料比、提取温度、提取时间、提取次数、提取液浓缩程度和丙酮用量等工艺参数进行了单因素优化。结果表明:体积分数95%的乙醇为提取溶剂,乙醇与预处理过的油茶饼粕液料比为9:1(mL:g),提取温度为70℃,提取时间为4 h,提取次数为2次,提取液浓缩至刚好有固体析出,丙酮用量为4倍浓缩液体积量时提取分离效果较佳,得到的茶皂素纯度为85.17%,得率为9.82%。不同溶剂打浆对产品纯化效果的比较发现:丙酮、乙酸乙酯、无水乙醇、体积分数95%的乙醇作为打浆纯化溶剂用于提高茶皂素纯度效果均不明显。 相似文献
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茶皂素提取和纯化工艺研究 总被引:1,自引:0,他引:1
以贵州省优势资源油茶利用后产生的油茶籽和废弃茶籽饼为主要原料,从中提取表面活性剂茶皂素,介绍了目前茶皂素的提取和纯化工艺,并进行了一定对比,以对生产实践进行指导。 相似文献
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采用环境友好的超临界二氧化碳流体萃取技术制备油茶籽油,考察了压力、时间、温度和二氧化碳流量等因素对茶籽油萃取率的影响,得到优化的工艺参数:当萃取压力30MPa、萃取温度35℃、CO2流量30L/h、萃取时间为3h时茶籽油萃取率可高达44.4%。根据中华人民共和国国家标准进行检测的结果表明:超临界二氧化碳流体萃取出的茶籽油,无需进一步精制即可达到国家食用植物油卫生标准GB/T2716—2005,而除含皂量、水分及挥发物外的指标均达到国家一级茶油标准GB11765—2003;GC/MS分析结果表明油茶籽油富含73.6%不饱和脂肪酸。实验结果表明:超临界二氧化碳流体技术萃取茶籽油具有操作简便、萃取率高、无溶剂残留、绿色环保等优点,萃取出的茶籽油具有较高的品质和良好的应用前景。 相似文献
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从茶籽饼中提取茶皂素的生产工艺研究 总被引:14,自引:0,他引:14
本文就从茶籽饼③中提取茶皂素的生产工艺进行了比较研究,通过对五种不同提取方法的比较,综合了水浸法和有机溶剂法的优点,总结出了一种新的提取工艺──水提──醇萃法。可得到纯度为95%的茶皂素,并且成本低,产率高 相似文献
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以油茶茶籽粕为原料,采用乙醇水溶液提取茶皂素。在茶籽粉和乙醇料液比1 : 9(g : mL),乙醇体积分数60%,提取温度60 ℃和提取时间3 h的最佳条件下茶皂素的提取得率达14.9%。用NKA-9型大孔吸附树脂吸附纯化茶皂素粗品,树脂静态吸附与解吸结果表明:树脂静态吸附茶皂素粗提液0.5 h基本饱和,体积分数80%乙醇解吸率为91.1%;动态吸附与解吸时,上样流速8 mL/min较佳,吸附率为66.04%,体积分数80%乙醇洗脱,洗脱流速5.0 mL/min,洗脱体积50 mL时,可使流出液中茶皂素质量浓度在1.25~1.57 g/L之间,茶皂素纯度为95%。 相似文献
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Distribution and Antioxidant Activities of Free,Conjugated, and Insoluble-Bound Phenolics from Seven Species of the Genus Camellia 总被引:1,自引:0,他引:1
Free phenolic (FP), conjugated phenolic (CP), and insoluble-bound phenolic (IBP) acids were extracted from the seeds of seven species of oil-tea camellia and their antioxidant activities were evaluated. The results indicated that Camellia vietnamensis has the highest total phenolic content (TPC) (31.84 ± 0.11 g of gallic acid equivalent [GAE] kg−1) and that Camellia polyodontia has the lowest TPC (12.34 ± 0.22 g GAE kg−1) in the kernel. The average TPC among the species is similar in both the kernels and in the shells, and the content order of the three forms of phenolic compounds is FP > IBP > CP. HPLC-MS analysis showed the presence of 9–11 phenolic compounds in the FP, CP, or IBP extracts of the seven species of oil-tea camellia seed. Among the phenolics identified, ferulic acid, catechin, and epicatechin were the major contributors of antioxidant activity. Hierarchical cluster analysis conducted based on the phenolic properties showed that C. vietnamensis and Camellia semiserrata belong to the group characterized by high antioxidant capacities (FRAP, ferric-ion-reducing antioxidant power; ABTS assay), and Camellia chekiangoleosa and Camellia oleifera are arranged in a group with moderate phenolic properties. The other species constitute the third cluster with low phenolic content and antioxidant activity. The study demonstrated that oil-tea camellia seed contains significant amounts of phenolic acids. In addition, extracts from various parts of the seed could be interesting novel sources of natural antioxidants. 相似文献
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《分离科学与技术》2012,47(1):243-262
Abstract Microwave-assisted extraction (MAE) was applied for the extraction of astaxanthin from Haematococcus pluvialis and response surface methodology (RSM) was used to optimize extraction parameters to the content of astaxanthin. Four independent variables such as microwave power (W), extraction time (sec), solvent volume (mL), and the number of extraction were optimized in this paper. The optimal conditions were determined and tri-dimensional response surfaces were plotted from the mathematical models. The F-test and p-value indicated that microwave power, extraction time, the number of extraction, and their quadratic had a highly significant effect on the response value (p <0.01), then the solvent volume and the interaction effects of microwave power and the number of extraction also displayed significant effect (p <0.05). Considering the extraction efficiency, the optimized conditions of MAE were as follows: microwave power was 141 W, extraction time 83 sec, solvent volume 9.8 mL, the number of extraction four times. About 594 ± 3.02 µg astaxanthin was extracted from Haematococcus pluvialis the dried powders (100 mg) under the optimal conditions, and it close to the predicted contents (592 µg). The antioxidant activities of the extracts obtained under optimal conditions were analyzed, and the results showed that the extracts presented strong ability of inhibiting the peroxidantion of linoleic acid, exhibited strong radical-scavenging properties against the DPPH, as well as strong reducing power. 相似文献
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《分离科学与技术》2012,47(3):671-681
Abstract Response surface methodology (RSM) was applied to predict optimum conditions for microwave‐assisted extraction (MAE) of flavonoid from Radix Astragali. A central composite design was used to monitor the effect of temperature, extraction time, solvent‐to‐material ratio, and the ethanol concentration on yield of total flavanoid (TFA). Optimum extraction conditions were predicted as 108.2°C, 26.7 min, 23.1 ml/g solvent‐to‐material ratio and 86.2% ethanol. The maximum yield 1.234±0.031 mg/g was close to the yield of Soxhlet and higher than that of ultrasound assisted extraction and heat reflux extraction. MAE was an effective alternative to conventional extraction methods. 相似文献
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Kenneth D. Carlson Robert Kleiman Robert P. Pavlik 《Journal of the American Oil Chemists' Society》1993,70(12):1269-1272
Simulation of commercial processing of Cuphea seed to obtain needed quantities of oil and meal was accomplished with pilot
facilities. Cuphea seed was conditioned in a single-deck cooker. Cooked seed was pressed with a mechanical screw with two-speed
shaft, variable-speed drives and a four-section cage with cored sleeves. A feed rate of 22 kg seed/h and a feed screw-to-main
shaft ratio of 2:1 gave good press cake with 8.1% residual oil. Press cake was extracted in a batch-type modular extraction
pilot plant. Miscella stages were sequentially pumped through the beds, followed by hexane rinses. Spent cake was desolventized
and toasted, and full miscellas were stripped to recover the crude oil. The finished Cuphea meal had only 0.30–0.55% residual
oil. Thus, conditioned Cuphea seed was easily pressed without prior flaking to acceptable cakes, and conditions simulating
commercial solvent extraction efficiently removed residual cake oil. 相似文献
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Junqing Qian Xiaohua Zhao Changyan Zhao Haiyan Yang Lihong Gou Wentao Wang Hui Guo 《European Journal of Lipid Science and Technology》2021,123(1):2000223
High-temperature pretreatment that is currently used in camellia oil extraction can have negative effects on the quality of camellia oil. In this study, the enzymatic pretreatment of camellia seeds is explored as an alternative to high-temperature pretreatment. The main conditions for enzymatic pretreatment of camellia seeds including enzyme, pH, temperature, time, and buffer solution are optimized using the response surface methodology. Under the optimal conditions of enzymatic pretreatment, the oil recovery is close to 75%. Moreover, residual oil recovery from camellia seeds subjected to 1398 neutral protease pretreatment (4 g per kg seeds) and high-temperature pretreatment are 5.62 ± 0.08% and 9.97 ± 0.18%, respectively. The enzymatic pretreatment is further applied to pre-pressing solvent extraction of camellia oil, the cake oil recovery from camellia seeds subjected to enzymatic pretreatment is higher than that from high-temperature pretreatment. These results show that enzymatic pretreatment of camellia seeds has potential for application in the oil industry. Practical Applications : This study suggests that enzymatic pretreatment can replace high-temperature pretreatment and improve oil recovery and oil quality. Ultimately, this method can be used to extract camellia oil. 相似文献
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