Using Fly Ash to Preparare Polysilicate Aluminum Ferric Flocculant and Treating Coal Slurry

2015 ◽  
Vol 1092-1093 ◽  
pp. 966-971
Author(s):  
Jian Li Yang ◽  
Mei Li Du ◽  
Gang Li
Keyword(s):  
Fly Ash ◽  
Orthogonal Experiment ◽  
Curing Temperature ◽  
Molar Ratio ◽  
Optimum Process ◽  
Process Conditions ◽  
Coal Slurry ◽  
Element Ratio ◽  
Silicon Iron ◽  
Aluminum Iron

Solid waste resource utilization is a important way for sustainable economic development, environmental and ecological protection. Using adsorption and flocculation characteristics of fly ash to preparare fly ash-based inorganic flocculant and use it for treating slime water, make waste fly ash into treasure, not only solve environmental problems, but also has very important theoretical significance and application value.In this study, we use Na2CO3 melt to improve acid-soluble activity of fly ash, extract ideally the aluminum and iron silicon as active ingredients in the fly ash. On the basis of the solubilization experiment, we design orthogonal experiment about larger impact several factors on the the flocculant preparation of process: silicon and aluminum element ratio, silicon iron element ratio and curing temperature, the orthogonal experiment results show that the best optimum process conditions is: Si: Al (mole ratio) is 1:0.5, Si: Fe (molar ratio) is 1:0.5, curing temperature is 60°C, curing time is 2 hours. Finally, we use poly silicate aluminum iron flocculants prepared to do flocculation test on slime water, determine the best flocculation conditions is: when we treat slime water which concentration is 8g/L and volume is 250mL, the optimum dosage of polysilicate aluminum iron is 1.3mL, the transmittance gets to 74.2%, the flocculation effect is the best.

Study on the Enzyme Desizing Process for Cotton Fabric Using Ultrasonication

2011 ◽  
Vol 331 ◽  
pp. 261-264 ◽  
Author(s):  
Qi Ming Zhao ◽  
Shan Yan Zhang
Keyword(s):  
Cotton Fabric ◽  
Ph Value ◽  
Orthogonal Experiment ◽  
Research Result ◽  
Strength Loss ◽  
Cotton Fabrics ◽  
Optimum Process ◽  
Process Conditions ◽  
Fabric Strength ◽  
Enzyme Dosage

The auxiliary devices of ultrasonic treatment was designed and manufactured. The cotton fabric was desized using 2000L desizing enzyme with the conventional enzyme desizing process and ultrasonic enzyme desizing process respectively. Through the orthogonal experiment, the optimum process conditions of conventional enzyme desizing process and ultrasonic enzyme desizing process were determined. For the conventional enzyme desizing process, the optimized desizing conditions of cotton fabrics were: desizing enzyme dosage was 1.5g/l, temperature was 80°C, PH value was 6, and time was 60mins. The optimum process conditions of ultrasonic enzyme desizing process were: desizing enzyme dosage was 1.5g/l, temperature was 50°C, PH value was 6 and time was 45minutes. The research result indicates that, under the same desizing condition, ultrasonication can improve the desizing percentage and whiteness of cotton fabric, but the fabric strength loss increases slightly. And for the same required desizing percentage, the ultrasonic enzyme desizing process saved time and reduced the temperature of experiments compared with traditional enzyme desizing process

The Preparation of Loaded Photocatalyst for Advanced Treatment of NH3-N in Coking Water

2013 ◽  
Vol 726-731 ◽  
pp. 2829-2832
Author(s):  
Yong Shu Tian ◽  
Run Xin Hou
Keyword(s):  
Photocatalytic Degradation ◽  
Orthogonal Experiment ◽  
Influence Factors ◽  
Advanced Treatment ◽  
Optimum Process ◽  
Process Conditions ◽  
Single Factor ◽  
Clay Brick ◽  
Degradation Rates ◽  
Single Factor Experiment

Photocatalyst of Fe-Sm-Yb modified TiO2 loaded on clay brick was prepared for degradation of NH3-N in coking water. The influence factors of NH3-N degradation rates were discussed by single factor experiment and orthogonal experiment. The optimum process conditions of photocatalytic degradation NH3-N in coking water were confirmed. The results show that NH3-N degradation rates 82.23% were highest in the conditions of pH 6.5, photocatalyst charge of 1.4 g, illumination for 6h, reaction at 55°C, calcination at 500°C.

Study on Preparation Technology Optimization of Sultamicillin Tosilate-β-Cyclodextrin

2015 ◽  
Vol 1120-1121 ◽  
pp. 873-876
Author(s):  
Xiang Qun Xu ◽  
Nian Hong ◽  
Jie Yang ◽  
You Quan Zhong ◽  
Lin Cheng
Keyword(s):  
Orthogonal Experiment ◽  
Process Condition ◽  
Molar Ratio ◽  
Process Conditions ◽  
Preparation Technology ◽  
Inclusion Process ◽  
Cyclodextrin Inclusion ◽  
Main Factors ◽  
Time Of Reaction

To study the process conditions for preparing sultamicillin tosilate β-cyclodextrin inclusion.Method: Choose the usage ration of sultamicillin tosilate with β-cyclodextrin, the inclusion temperature and the time of reaction as the main factors, and use the inclusion yield as evaluated indicators and the process condition to conduct the L9 (34) orthogonal experiment Optimization Pack sultamicillin tosilate.Outcome: The optimum inclusion process condition: molar ratio of the sultamicillin tosilate with β-cyclodextrin is 1:8, inclusion temperature is 47°C, inclusion time is 40 minutes.Conclusion: The process condition of using β-cyclodextrin inclusion to inconcluse sultamicillin tosilate is feasible, effective, and of applicative value.

Study on Preparation of Nanocarbon Black-Polypropylene Electric Conduction Composite Materials

2013 ◽  
Vol 785-786 ◽  
pp. 183-186
Author(s):  
Zhi Jia Han ◽  
Sheng Fei Shen ◽  
Zai Yuan Li
Keyword(s):  
Carbon Black ◽  
Orthogonal Experiment ◽  
Optimum Process ◽  
Process Conditions ◽  
Mixing Times ◽  
Single Factor ◽  
Carbon Black Content ◽  
Polypropylene Composite ◽  
Polypropylene Composites ◽  
Single Factor Experiment

The paper has learned on the preparation of nanometer carbon black and polypropylene nanocarbon black-polypropylene composite material by using the small extrusion blending mixer which has been designed by our team. The results show that: Resistance of nanometer carbon black - polypropylene composites decreases with increasing carbon black content and extrusion mixing times. Through single factor experiment and orthogonal experiment to determine the optimum process conditions are at 260°C, nanocarbon black content 60%, extrusion mixing times 5. Under these conditions the resistance of nanometer carbon black-get polypropylene composites is 12.73 ohms.

Preparation of Aspirin-β-Cyclodextrin Inclusion Complex by Grinding Method

2015 ◽  
Vol 1120-1121 ◽  
pp. 882-885 ◽  
Author(s):  
Xiang Qun Xu ◽  
Nian Hong ◽  
Jing Wen Zheng ◽  
Bing Bing Guo ◽  
Lin Cheng
Keyword(s):  
Orthogonal Experiment ◽  
Process Condition ◽  
Molar Ratio ◽  
Process Conditions ◽  
Inclusion Process ◽  
Grinding Method ◽  
Cyclodextrin Inclusion ◽  
Main Factors ◽  
Cyclodextrin Inclusion Complex ◽  
Time Of Reaction

To study the process conditions for preparing aspirin β-cyclodextrin inclusion.Method: Choose the usage ration of aspirin with β-cyclodextrin and the time of reaction as the main factors, and use the inclusion yield as evaluated indicators and the process condition to conduct orthogonal experiment Optimization Pack aspirin.Outcome: The optimum inclusion process condition: molar ratio of the aspirin with β-cyclodextrin is 1:3, inclusion time is 60 minutes.Conclusion: The process condition of using β-cyclodextrin inclusion to inconcluse aspirin is feasible, effective, and of applicative value.

scholarly journals Modeling the biodiesel production using the wheat straw ash as a catalyst

2021 ◽  
Vol 75 (5) ◽  
pp. 257-276
Author(s):  
Ana Velickovic ◽  
Jelena Avramovic ◽  
Milan Kostic ◽  
Jugoslav Krstic ◽  
Olivera Stamenkovic ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Sunflower Oil ◽  
Methyl Esters ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Catalyst Loading ◽  
Optimum Process ◽  
Process Conditions ◽  
X Ray ◽  
Straw Ash

Wheat straw ash (WSA) was investigated as a new catalyst in biodiesel production from sunflower oil. The catalyst was characterized by temperature-programmed decomposition, X- ray powder diffraction, Hg porosimetry, N2 physisorption, and scanning electron microscopy - energy dispersive X-ray spectroscopy methods. The methanolysis reaction was tested in the temperature range of 55?65?C, the catalyst loading range 10?20 % of the oil weight, and the methanol-to-oil molar ratio range 18 : 1?24 : 1. The reaction conditions of the sunflower oil methanolysis over WSA were optimized by using the response surface methodology in combination with the historical experimental design. The optimum process conditions ensuring the highest fatty acid methyl esters (FAME) content of 98.6 % were the reaction temperature of 60.3?C, the catalyst loading of 11.6 % (based on the oil weight), the methanol-to-oil molar ratio of 18.3 :1, and the reaction time of 124 min. The values of the statistical criteria, such as coefficients of determination (R2 = 0.811, R2 = 0.789, R2 = 0.761) and the mean relative percent deviation (MRPD) value of 10.6 % (66 data) implied the acceptability and precision of the developed model. The FAME content after 4 h of reaction under the optimal conditions decreased to 37, 12, and 3 %, after the first, second, and third reuse, respectively.

Study on Ultrasonic Wave Extraction of Flavonoids from Bamboo Leaves

2013 ◽  
Vol 781-784 ◽  
pp. 731-736 ◽  
Author(s):  
Shao Juan Jiang
Keyword(s):  
Ultrasonic Wave ◽  
Ethanol Concentration ◽  
Orthogonal Experiment ◽  
Optimum Process ◽  
Process Conditions ◽  
Bamboo Leaves ◽  
Assisted Extraction ◽  
Ultrasonic Assisted ◽  
Ultrasonic Assisted Extraction ◽  
Single Factor Experiment

Extracting flavone from bamboo leaves by ultrasonic, the flavonoid extraction conditions was optimized by single factor experiment and orthogonal experiment design, and the traditional heat reflux method was compared. The results showed that: the optimum process conditions of ultrasonic wave extraction of flavonoids from bamboo leaves were ethanol concentration of 70%, solid to liquid ratio of 1:20, extracting 20 min in 60 °C. Under this condition, extraction content of total flavonoids was up to 4.538 mg.g-1. And ultrasonic assisted extraction was superior to hot reflux extraction.

scholarly journals The separation of microscale HA in aqueous solution by foam separation technique

2019 ◽  
Vol 21 (4) ◽  
pp. 66-71
Author(s):  
Shao Wenyao ◽  
Gong Xiao ◽  
Cui Shuming ◽  
Lin Ying ◽  
Lu Yinghua ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Recovery Rate ◽  
Orthogonal Experiment ◽  
Extraction Process ◽  
Separation Technique ◽  
Enrichment Ratio ◽  
Liquid Volume ◽  
Optimum Process ◽  
Process Conditions ◽  
Foam Separation

Abstract Hyaluronic acid (HA) has important applications in fields of health care products, cosmetics and clinical medical. However, the unique physiological properties of HA make cost of its traditional separation and extraction process relatively high. Foam separation technique has simple, gentle and efficient advantages on the separation of substances with surface activity by using bubbles as the separation medium. In this paper, natural surfactant CocamideBetaine (CAPB) was used as a foaming agent to explore the technology of microscale HA in aqueous solution by foam separation. The optimum process conditions were determined based on the recovery rate and enrichment ratio of HA by single factor and orthogonal experiment: at room temperature, pH = 7, separating air velocity (v) = 350 mL/min, HA concentration (CHA) = 50 mg/L, adding liquid volume (V) = 200 mL, collecting time (tcol) = 10 min, CAPB concentration (CCAPB) = 0.035 g/L. Under these conditions, HA enrichment ratio (E) equals 6.821 and HA recovery rate (R) equals 66.425%.

A Study of Surface Treatment on LY12 Aluminum Alloy by γ-APS

2009 ◽  
Vol 79-82 ◽  
pp. 1891-1894
Author(s):  
Dong Sheng Xia ◽  
Yu Zhou Gao ◽  
Hui Chen Zhang ◽  
Yan Yu
Keyword(s):  
Aluminum Alloy ◽  
Process Parameters ◽  
Electrochemical Impedance ◽  
Solution Concentration ◽  
Dip Coating ◽  
Curing Temperature ◽  
Optimum Process ◽  
Process Conditions ◽  
Water Mixture ◽  
Silane Treatment

The work aims to investigate the anti-corrosion behavior of silane treated LY12 aluminum alloy (AA LY12) and optimize the process conditions of silane treatment. The silane films were prepared on AA LY12 from γ-aminopropyltriethoxysilane (γ-APS) hydrolized in ethanol/water mixture by dip coating method. The optimum process parameters were obtained from the orthogonal designs in terms of silane solution concentration, ethanol/water ratio, dipping time, curing temperature and curing time. Prior and after silane treatment, the surface of AA LY12 was characterized by contact angle measurements and scan electron microscopy (SEM). The potentiodynamic polarization tests and electrochemical impedance spectroscopy measurements (EIS) were employed to study the anti-corrosion characteristics of silane films on AA LY12. The impedance plots were fitted with the different equivalent circuits. Furthermore, the influence of the above process parameters of silane treatment on film formation and anti-corrosion performance was explored. The results indicate that the γ-APS treated AA LY12 significantly improved the corrosion resistance, compared to the untreated one.

scholarly journals Continuous Integrated Process of Biodiesel Production and Purification—The End of the Conventional Two-Stage Batch Process?

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 403
Author(s):  
Matea Bačić ◽  
Anabela Ljubić ◽  
Martin Gojun ◽  
Anita Šalić ◽  
Ana Jurinjak Tušek ◽  
...  
Keyword(s):  
Extraction Efficiency ◽  
Deep Eutectic Solvent ◽  
International Standards ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Process Conditions ◽  
Integrated Process ◽  
Free Glycerol ◽  
Mass Ratio ◽  
Glycerol Content

In this research, optimization of the integrated biodiesel production process composed of transesterification of edible sunflower oil, catalyzed by commercial lipase, with simultaneous extraction of glycerol from the reaction mixture was performed. Deep eutectic solvents (DESs) were used in this integrated process as the reaction and extraction media. For two systems, choline chloride:glycerol (ChCl:Gly) and choline chloride:ethylene glycol (ChCl:EG), respectively, the optimal water content, mass ratio of the phase containing the mixture of reactants (oil and methanol) with an enzyme and a DES phase (mass ratio of phases), and the molar ratio of deep eutectic solvent constituents were determined using response surface methodology (RSM). Experiments performed with ChCl:Gly resulted in a higher biodiesel yield and higher glycerol extraction efficiency, namely, a mass ratio of phases of 1:1, a mass fraction of water of 6.6%, and a molar ratio of the ChCl:Gly of 1:3.5 were determined to be the optimal process conditions. When the reaction was performed in a batch reactor under the optimal conditions, the process resulted in a 43.54 ± 0.2% yield and 99.54 ± 0.19% glycerol extraction efficiency (t = 2 h). Unfortunately, the free glycerol content was higher than the one defined by international standards (wG > 0.02%); therefore, the process was performed in a microsystem to enhance the mass transfer. Gaining the same yield and free glycerol content below the standards (wG = 0.0019 ± 0.003%), the microsystem proved to be a good direction for future process optimization.

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