scholarly journals The impact of co-solvent application on the solvent refining process selectivity

Nafta-Gaz ◽  
2020 ◽  
Vol 76 (9) ◽  
pp. 610-619
Author(s):  
Artur Antosz ◽  
Keyword(s):  
Refining Process ◽  
Solvent Refining ◽  
The Impact

Study of the Removal of Boron from Metallurgical Grade Silicon by Oxidation Slagging Method

2010 ◽  
Vol 156-157 ◽  
pp. 882-885 ◽  
Author(s):  
Yu Yan Hu ◽  
Dong Liang Lu ◽  
Tao Lin ◽  
Yu Liu ◽  
Bo Wang ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Orthogonal Experiment ◽  
Slag System ◽  
Refining Process ◽  
Impact Factors ◽  
Metallurgical Grade Silicon ◽  
Optimum Parameters ◽  
Grade Silicon ◽  
Refining Time ◽  
The Impact

Refining of solar grade silicon by metallurgical method is the research hotspot of polycrystalline field. Slagging method is benefit to the removal of the impurities especially to boron exsisted in the raw silicon. In this study, the influence of the density, the viscosity and liquidus temperature of the slag components on the refining process were discussed, and then the slag system SiO2-Na2CO3 was choosed as the slagging agents. And then the impact factors on the removal efficiency of boron such as the composition of SiO2 and Na2CO3, the ratio of slag to silicon and the refining time were investigated by the orthogonal experiment. The results showed that the optimum parameters of the oxidation refining for removing boron were as follows: the main composition of the oxidant is “SiO2 : Na2CO3 = 60% : 40%”; the slag/silicon ratio is 0.5; time for refining is 60min at 1550 . The results indicated that the removal efficiency of boron was 88.28%, and the content of boron in MG-Si can be reduced to 7ppmw under the best refining process¬.

scholarly journals Effect of the Refining Process on Total Hydroxytyrosol, Tyrosol, and Tocopherol Contents of Olive Oil

Foods ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 292 ◽  
Author(s):  
Paolo Lucci ◽  
Valentina Bertoz ◽  
Deborah Pacetti ◽  
Sabrina Moret ◽  
Lanfranco Conte
Keyword(s):  
Olive Oil ◽  
Marked Effect ◽  
Refining Process ◽  
International Standards ◽  
Oil Refining ◽  
Clear Cut ◽  
Olive Oils ◽  
The Impact ◽  
Hydrolysis Of ◽  
Variation Trends

The impact of the olive oil refining process on major antioxidant compound levels was evaluated by means of UHPLC analysis of lampante olive oils collected at different stages of the refining procedure (degumming, chemical and physical flash neutralization, bleaching, and deodorization). For this purpose, the evolution of the tocopherol fraction was investigated by means of the UHPLC-FL method, while the influence of the refining process on the total hydrolyzed phenolic content was assessed by measuring hydroxytyrosol and tyrosol levels after acid hydrolysis of the phenolic extracts. Refining was found to have a marked effect on total hydroxytyrosol and tyrosol contents, as they are completely removed in the early steps of the refining procedure. In contrast, the variation trends of tocopherols are not always clear-cut, and significant decreases in content from 7% to 16% were only revealed during refining in four out of nine samples. In addition, five of the nine refined oils showed final tocopherol concentrations higher than 200 mg/kg, the limit imposed by international standards regarding the content of such compounds in commercial olive oils. This study supports the need for a revision of the International Olive Oil Council (IOC) standard relative to the limit established for tocopherol addition to refined oils to avoid possible legal and economic trade issues.

The Research Progress of TiB2 Impacts on the Refining Effect of Al-Ti-B Master Alloy

2014 ◽  
Vol 574 ◽  
pp. 391-395
Author(s):  
Li Mi ◽  
Jun Jun Wang ◽  
Zhi Liu Hu
Keyword(s):  
Master Alloy ◽  
Refining Process ◽  
Research Progress ◽  
Grain Refining ◽  
Grain Refiner ◽  
Standing Time ◽  
Refining Effect ◽  
Initial Nucleus ◽  
Refinement Mechanism ◽  
The Impact

Al-Ti-B master alloy is the most widely used grain refiner in the aluminum fabrication industry, while it’s refinement mechanism is not clearly understand yet. The TiB2 in Al-Ti-B master alloy is one of important phase to grain refining, which intimately related to the generation of initial nucleus, the “fading” phenomenon of refining effect declines with the increase of holding or standing time in grain refining process. Besides, TiB2 is analyzed in several studies about the “poisoning” phenomenon, a large extent weaken of refining effect when Zr, Cr, Mn etc. exists. In this article, the impact of TiB2 to the refining effect of Al-Ti-B master alloy is discussed aiming at the roles and phenomenon mentions above.

Effect of Ga Addition on Morphology and Recovery of Primary Si During Al–Si Alloy Solidification Refining

2015 ◽  
Vol 34 (8) ◽  
Author(s):  
Jingwei Li ◽  
Xiaolong Bai ◽  
Yanlei Li ◽  
Boyuan Ban ◽  
Jian Chen
Keyword(s):  
Recovery Rate ◽  
Plate Thickness ◽  
Refining Process ◽  
Alloy Solidification ◽  
Solvent Refining ◽  
Plate Length ◽  
Primary Si ◽  
Ga Content

AbstractThe effect of Ga addition on alloy macrostructure, morphology and recovery rate of primary Si during the Al–Si–Ga alloy solvent refining process of silicon was studied in this work. The addition of Ga to Al–Si alloy could change the morphology of the primary Si. The average plate thickness of the primary Si increases with increase of Ga content. With the increase of Ga content, the average plate length of the primary Si crystals becomes larger when the Ga content is less than 5% in the Al–30%Si–

scholarly journals Changes of physicochemical properties, oxidative stability and cellular anti-inflammatory potentials for sea-buckthorn pulp oils during refining

RSC Advances ◽  
2020 ◽  
Vol 10 (60) ◽  
pp. 36678-36685
Author(s):  
Xiaofei Jiang ◽  
Wei Li ◽  
Shengmin Zhou ◽  
Yuanrong Jiang
Keyword(s):  
Physicochemical Properties ◽  
Oxidative Stability ◽  
Refining Process ◽  
Sea Buckthorn ◽  
Anti Inflammatory ◽  
The Impact

The impact of the refining process on physicochemical properties, oxidative stability and cellular anti-inflammatory potentials of sea-buckthorn pulp oil (SBO) was investigated in this study.

scholarly journals Separation and Recovery of Refined Si from Al–Si Melt by Modified Czochralski Method

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 996
Author(s):  
Jingwei Li ◽  
Juncheng Li ◽  
Yinhe Lin ◽  
Jian Shi ◽  
Boyuan Ban ◽  
...  
Keyword(s):  
Industrial Application ◽  
Alloy System ◽  
Silicon Powder ◽  
Czochralski Method ◽  
Refining Process ◽  
Solar Grade Silicon ◽  
Solvent Refining ◽  
Grade Silicon ◽  
Czochralski Process ◽  
Removal Fraction

Separation of refined silicon from Al–Si melt is still a puzzle for the solvent refining process, resulting in considerable waste of acid and silicon powder. A novel modified Czochralski method within the Al–Si alloy is proposed. After the modified Czochralski process, a large amount of refined Si particles was enriched around the seed crystalline Si and separated from the Al–Si melt. As for the Al–28%Si with the pulling rate of 0.001 mm/min, the recovery of refined Si in the pulled-up alloy (PUA) sample is 21.5%, an improvement of 22% compared with the theoretical value, which is much larger 1.99 times than that in the remained alloy (RA) sample. The content of impurities in the PUA is much less than that in the RA sample, which indicates that the modified Czochralski method is effective to improve the removal fraction of impurities. The apparent segregation coefficients of boron (B) and phosphorus (P) in the PUA and RA samples were evaluated. These results demonstrate that the modified Czochralski method for the alloy system is an effective way to enrich and separate refined silicon from the Al–Si melt, which provide a potential and clean production of solar grade silicon (SoG-Si) for the future industrial application.

scholarly journals The Efficiency of Separate and Combined Modified Electrolysis Processes and Electric Coagulation in Removing Yellow Gold Dye (Gold Yellow X-GL) from Aqueous Solutions

2019 ◽  
Author(s):  
Reza Ali Fallahzadeh ◽  
Davoud Ghadirian ◽  
Ahmad Fattahi ◽  
Pejman Amjadian ◽  
Samaneh Mozaffary ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Removal Efficiency ◽  
Dye Removal ◽  
Refining Process ◽  
Process Efficiency ◽  
Iron Electrode ◽  
Optimal Conditions ◽  
Yellow Color ◽  
Golden Yellow ◽  
The Impact

Introduction: Disposal of the wastewater produced in the paper and paperboard industry without the refining process can add substances to the environment, which are harmful to humans, environment, and other organisms. With regard to process efficiency, the current methods used in wastewater treatment of this industry are economically unjustifiable. Therefore, in this research, the electrolysis / electrocoagulation method was investigated using a graphite / iron electrode for synthetic aqueous solutions containing golden yellow X-GL. Materials and Methods: In this test, two Plexiglas reactors with a volume of 3 liters were used. The impact of the operation parameters such as voltage, initial dye concentration, and reaction time were investigated. Dye concentration in specimens was determined by visible spectrophotometry using DR-5000 at 438nm wavelength. Results: In optimal conditions of voltage 12V, dye concentration 10 mg/l, and time 60 min, the removal efficiency rates of electrolysis reactors, electric coagulation, and combined reactor were 64.17%, 75.42%, and 84.19% respectively. By increasing the dye concentration and decreasing the voltage, the dye removal efficiency decreased. Conclusion: The electric coagulation process using an iron electrode is a suitable method for removing the yellow color of colored aqueous solutions from the paper and paperboard industry.

scholarly journals Removal of B from Si by Hf addition during Al–Si solvent refining process

2016 ◽  
Vol 17 (1) ◽  
pp. 12-19 ◽  
Author(s):  
Yun Lei ◽  
Wenhui Ma ◽  
Luen Sun ◽  
Jijun Wu ◽  
Yongnian Dai ◽  
...  
Keyword(s):  
Refining Process ◽  
Solvent Refining ◽  
Hf Addition
Sign in / Sign up

Export Citation Format

Share Document