Castor Oil Extraction from Cold Pressed Cake Using Subcritical n-Butane Under Low Temperature and Refining Process of Oil

2014 ◽  
Vol 3 (3) ◽  
pp. 196-201 ◽  
Author(s):  
Fan-Tao Zeng ◽  
Liu Rukuan ◽  
Xiao Zhihong ◽  
Li Changzhu ◽  
Hongqi Ye
Keyword(s):  
Low Temperature ◽  
Castor Oil ◽  
Oil Extraction ◽  
Refining Process ◽  
Cold Pressed

LOW TEMPERATURE THERMOELECTRIC PROPERTIES AND AGING PHENOMENA OF NANOSTRUCTURED p-TYPE Bi2-XSbXTe3 (x = 1.46, 1.48, 1.52 AND 1.55)

2013 ◽  
Vol 06 (05) ◽  
pp. 1340008 ◽  
Author(s):  
DALE HITCHCOCK ◽  
YEN-LIANG LIU ◽  
YUFEI LIU ◽  
TERRY M. TRITT ◽  
JIAN HE ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Low Temperature ◽  
Thermoelectric Properties ◽  
Optimal Composition ◽  
Ambient Conditions ◽  
Bulk Materials ◽  
The Past ◽  
Aging Phenomena ◽  
P Type ◽  
Cold Pressed

Over the past decade the widely used p-type ( Bi 2-x Sb x) Te 3 bulk thermoelectric materials have been subject to various nanostructuring processes for higher thermoelectric performance. However, these nanostructuring processing were conducted on compositions optimized for bulk materials (x ~ 1.52–1.55). This leads to the question of whether the optimal composition for bulk materials is the same for their nanoscale counterparts. In this work we hydrothermally grew Bi 2-x Sb x Te 3 nanopowders (nominally, x = 1.46, 1.48, 1.52 and 1.55) and measured their thermoelectric properties on cold-pressed vacuum-sintered pellets (74–78% of the theoretical density) below 300 K. The measurements were conducted 18 months apart to probe the aging phenomena, with the samples stored in ambient conditions. We have found that (i) the peak of thermopower shifts to lower temperatures upon nanostructuring but it shifts back to higher temperatures upon aging; (ii) the electrical conductivity degrades by a factor of 1.5–2.3 upon aging while the temperature dependence is largely retained; and (iii) the ZT of freshly made samples is sensitive to the x value, a maximum ZT ~ 1.25(~ 0.62) at ~ 270 K (~ 255 K) was attained in the freshly made sample x = 1.55(x = 1.46), respectively; while the ZT of aged samples is significantly lowered by a factor of 2–4 but lesser x-dependent. These observations have been discussed in the context of charge buildup and compensation at grain boundaries.

scholarly journals Boron Carbide Nanowires from Castor Oil for Optronic Applications: A Low-Temperature Greener Approach

2020 ◽  
Author(s):  
H. V. Saritha Devi ◽  
M. S. Swapna ◽  
S SANKARARAMAN
Keyword(s):  
Low Temperature ◽  
Boron Carbide ◽  
Castor Oil ◽  
Light Emission ◽  
Bandgap Energy ◽  
X Ray Diffraction ◽  
Blue Light Emission ◽  
Tauc Plot ◽  
Plot Analysis ◽  
Cie Plot

Abstract The development of one-dimensional nanostructures has revolutionized electronic and photonic industries because of their unique properties. The present paper reports the low-temperature green synthesis of boron carbide nanowires, of diameter 14 nm and length 750 nm, by the condensation method using castor oil as the carbon precursor. The nanowires synthesized exhibit beaded chain morphology, and bandgap energy of 2.08 eV revealed through the Tauc plot analysis. The structure of boron carbide nanowires is revealed by Fourier transform infrared spectroscopy and X-ray diffraction analyses. The photoluminescence study reveals the nanowire's blue light emission capability under ultraviolet excitation, which is substantiated by the CIE plot suggesting its potential in photonic applications.

scholarly journals Low-Cost Investment with High Quality Performance. Bleaching Earths for Phosphorus Reduction in the Low-Temperature Bleaching Process of Rapeseed Oil

Foods ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 603 ◽  
Author(s):  
Barbara Łaska-Zieja ◽  
Damian Marcinkowski ◽  
Wojciech Golimowski ◽  
Gniewko Niedbała ◽  
Ewelina Wojciechowska
Keyword(s):  
Low Temperature ◽  
Rapeseed Oil ◽  
Low Cost ◽  
Magnesium Silicate ◽  
Industrial Plant ◽  
Bleaching Process ◽  
Low Efficiency ◽  
Hydrated Magnesium Silicate ◽  
Cold Pressed ◽  
Phosphorus Reduction

Rapeseed oils are a valuable component of the diet. Mostly, there are refined oils deprived of valuable nutrients in the market, hence in recent times cold-pressed and unrefined oils have been available and popular among consumers. However, the low yield of this oil makes this product expensive. The aim of the study was to analyse the effectiveness of phosphorus reduction in crude oils, cold- and hot-pressed in the low-temperature bleaching process. Eight market-available bleaching earths was compared. The effectiveness of 90% was found with 2% (m/m) of Kerolite with hydrated magnesium silicate. An increase in the share of earths to 4% (m/m) resulted in the effectiveness of phosphorus reduction >90% in seven out of eight analysed cases. Bentonite activated with acid with the lowest MgO content was characterised by low efficiency <64%. The research shows that the effectiveness of phosphorus reduction was significantly affected by the composition of earths applied in the bleaching process at ambient temperature. The results of research confirm the high effectiveness of the process as it is not necessary to heat up the oil before the bleaching process. This method is recommended for existing and new industrial plant for two-stage rapeseed oil pressing.

Characterization of microemulsions formulated from naturally and chemically extracted oils from Cocos nucifera Linne

2020 ◽  
Vol 16 (1) ◽  
pp. 39-48
Author(s):  
O.A. Adetunji ◽  
B. Adesanwo ◽  
O.A. Odeniyi
Keyword(s):  
Castor Oil ◽  
Cocos Nucifera ◽  
Antimicrobial Properties ◽  
Coconut Oil ◽  
Tween 80 ◽  
Antimicrobial Activities ◽  
Oil Extraction ◽  
Hot Water ◽  
Copper Zinc

Background: Oil derived from Cocos nucifera Linne (CNL) has been used in formulating creams; however, its use in formulation of microemulsion is not well documented in literature.Objective: Oils obtained from CNL were characterized, used in the formulation of microemulsions and were evaluated for their antimicrobial properties in comparison with Castor oil BP (CO) and commercially available coconut oil (CACO).Methodology: Oil from CNL was extracted by maceration in hot – water and petroleum ether to yield naturally extracted oil (NEO) and chemically extracted oil (CEO) respectively. The NEO and CEO were used in formulating microemulsions containing pre-determined ratios (3:7, 1:1, 9:1) of oil to surfactant mix (Smix) [containing polyethylene glycol: Tween 80® at ratio 2:1] Characterization of NEO, CEO and microemulsions were carried out using elemental constituents, rheology, physico-and phyto-chemical analysis, thermal stability and antimicrobial profiles as parameters. Statistical analysis was done using ANOVA at p<0.05Results: The NEO and CEO contained antraquinones and terpenoids, but were devoid of lead, copper, zinc, alkaloids, saponins, cardiac glycosides and flavonoids. Viscosity profiles were in the order CO>CEO>CACO>NEO. The microemulsions were in the size range 54.24±0.26-89.08±0.07 μm. Microemulsions of oil:Smix (3:7) were the most stable. Inhibition ranking was Candida sp.D25 (CEO:Smix>CACO: Smix>NEO: Smix>NEO>CO>CEO), Candida sp.D33 (CEO = CO>CACO: Smix=NEO>CEO:Smix=NEO:Smix), Staphylococcus sp.DS2 (NEO>CO>CACO:Smix>NEO: Smix>CEO: Smix=CEO) and Pseudomonas sp.DP8 (NEO:Smix>CO>CACO:Smix>CEO:Smix=NEO > CEO).Conclusion: Oil derived from CNL has good potentials as an excipient in the formulation of microemulsions and the method of oil extraction had a significant effect on the antimicrobial activities and on the microemulsions formulated using the oils. Keywords: Coconut oil, extraction method, castor oil, microemulsions, antimicrobial properties.

scholarly journals Effects of Limonene on the PAHs mutagenicity risk in Roasted Fish Skin

2018 ◽  
Author(s):  
Yu-Wei Chen ◽  
Ping-Hsiu Huang ◽  
Yung-Hsiang Tsai ◽  
Chii-Ming Jiang ◽  
Chih-Yao Hou
Keyword(s):  
Essential Oil ◽  
Oil Extraction ◽  
Lemon Juice ◽  
Citrus Fruits ◽  
Fish Skin ◽  
Lemon Oil ◽  
Cold Pressed ◽  
Cold Pressure

Traditional edible barbecue products use with lemon juice not only make the barbecue more delicious but also reduce the risk of PAHs in the barbecue products. One of the major economics crops in Taiwan, the waste from citrus fruits was very tremendous mass. However, the peelings of citrus fruits are rich in essential oil, especially, the limonene is the major. Whether the anti-carcinogenesis activities of terpene, such as limonene, in citrus fruits essential oil extraction. This study to demonstrate the PAHs content in fish skin increased markedly after being roasted at 210℃ for 20 minutes and greater mutagenicity risk of roasted fish skin was observed by Ame's test. The reduction of mutagenicity risk of roasted fish skin, which the antimutagenic abilities of substances in descending order were limonene &gt; cold pressure oil &gt; lemon &gt;grapefruit. The antimutagenicity rate and ability of the three extracts were limonene: 18&ndash;23%; cold-pressed lemon oil: 18&ndash;22%; and steam distilled lemon essential oil: 8&ndash;16%. The obvious anti- mutagenicity effects against the PAHs mutagenicity of roasted fish skins can be found in citrus fruits essential oil extraction.

scholarly journals Assessment of Low Temperature Refining Process of Castor Seed Oil for Biodiesel Production

2019 ◽  
Vol 3 (1) ◽  
pp. 1 ◽  
Author(s):  
Chika Muhammad ◽  
Muhammad Mukhtar ◽  
Muhammad Sabiu Jibrin ◽  
Musa Usman Dabai ◽  
Aliyu Sarkin Baki
Keyword(s):  
Low Temperature ◽  
Seed Oil ◽  
Refining Process ◽  
Biodiesel Production ◽  
Castor Seed

scholarly journals The Effect of Microwave Pretreatment on Micronutrient Contents, Oxidative Stability and Flavor Quality of Peanut Oil

Molecules ◽  
2018 ◽  
Vol 24 (1) ◽  
pp. 62 ◽  
Author(s):  
Hui Hu ◽  
Hongzhi Liu ◽  
Aimin Shi ◽  
Li Liu ◽  
Marie Fauconnier ◽  
...  
Keyword(s):  
Oxidative Stability ◽  
Acid Value ◽  
Oil Extraction ◽  
Extraction Yield ◽  
Peanut Oil ◽  
Flavor Quality ◽  
Untreated Sample ◽  
Codex Standard ◽  
Cold Pressed

The purpose of the present study is to investigate the changes in extraction yield, physicochemical properties, micronutrients content, oxidative stability and flavor quality of cold pressed peanut oil extracted from microwave (MW) treated seeds (0, 1, 2, 3, 4, 5 min, 700 W). The acid value and peroxide value of extracted oil from MW-treated peanuts were slightly increased but far below the limit in the Codex standard. Compared with the untreated sample, a significant (p < 0.05) increase in extraction yield (by 33.75%), free phytosterols content (by 32.83%), free tocopherols content (by 51.36%) and induction period (by 168.93%) of oil extracted from 5 min MW-treated peanut were observed. MW pretreatment formed pyrazines which contribute to improving the nutty and roasty flavor of oil. In conclusion, MW pretreatment is a feasible method to improve the oil extraction yield and obtain the cold pressed peanut oil with longer shelf life and better flavor.

Effect of Fruit Maturity on Microstructural Changes and Oil Yield during Cold‐Pressed Oil Extraction of ‘Hass’ Avocado

2020 ◽  
Vol 97 (7) ◽  
pp. 779-788
Author(s):  
Shuo Yang ◽  
Christina Fullerton ◽  
Ian Hallett ◽  
Hyunah E. Oh ◽  
Allan B. Woolf ◽  
...  
Keyword(s):  
Oil Extraction ◽  
Oil Yield ◽  
Microstructural Changes ◽  
Fruit Maturity ◽  
Hass Avocado ◽  
Cold Pressed

Optimization of Sesame Oil Extraction by Screw-Pressing at Low Temperature

2017 ◽  
Vol 10 (6) ◽  
pp. 1113-1121 ◽  
Author(s):  
Marcela L. Martínez ◽  
Ma. Gabriela Bordón ◽  
Rebeca L. Lallana ◽  
Pablo D. Ribotta ◽  
Damián M. Maestri
Keyword(s):  
Low Temperature ◽  
Oil Extraction ◽  
Sesame Oil ◽  
Screw Pressing
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