Experimental Researches on the Preparation of High-Efficient Active Floridin by Mixed Acids

2012 ◽  
Vol 510 ◽  
pp. 713-718
Author(s):  
Ming Yong Shu ◽  
Hai Ying Yin ◽  
Guang Hui Liu
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Volume Ratio ◽  
Raw Material ◽  
Activation Effect ◽  
Solid Ratio ◽  
High Efficient ◽  
Main Factors ◽  
Experimental Researches ◽  
Mixed Acids

Taking ca-bentonite as the raw material, the activation effect of active floridin prepared by mixed acids of H2SO4, HCl and C2H2O4 is studied. The research results indicate that the main factors influencing the activity and decolorization ratio of floridin include volume ratio of mixed acids, liquid-to-solid ratio, reaction temperature and reaction time. When the volume ratio of mixed acids H2SO4: HCl: C2H2O4=5:5:1, liquid-to-solid ratio =4:1, reaction temperature 80 and reaction time 4h, it is possible to prepare high-efficient active floridin.

Removal Phosphorous from High Phosphorous Converter Steel Making Slag by Hydrometallurgical Process

2012 ◽  
Vol 581-582 ◽  
pp. 940-943 ◽  
Author(s):  
Wen Tang Xia ◽  
Xue Jiao Zhou ◽  
Jian Guo Yin ◽  
Yi Feng Gao ◽  
Wen Qiang Yang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Steel Slag ◽  
Converter Steel ◽  
Content Increase ◽  
Solid Ratio ◽  
Slag Particle ◽  
High Efficient ◽  
Hydrometallurgical Method ◽  
The Impact

Removing phosphorus from high phosphorus converter steel slag by hydrometallurgical method was studied in this paper. The influence of different dephosphorizting agents on the effect of phosphorus slag was investigated, and high efficient dephosphorizating agent was found. The effects of reaction time, liquid to solid ratio, stirring speed, reaction temperature and dephosphorizing agent concentration on the impact of dephosphorization were studied. The results showed that on the conditions of the reaction time 40 min, slag particle size <0.147 mm, liquid to solid ratio of 4:1, stirring speed 400 rpm, the reaction temperature 25 °C, and dephosphorizing agent concentration 5 mol/L, the optimum dephosphorization results were achieved. The dephosphorization ratio can reach 70%, and the phosphorus content in steel slag decreased from 1.03% to 0.46%, the total iron content increase from 30.676% to above 44%.

Research of Preparation Factors on Magnetic Cassava Starch Microspheres

2013 ◽  
Vol 634-638 ◽  
pp. 1513-1517
Author(s):  
Ping Lan ◽  
Yu Xian Feng ◽  
A Ming Chen ◽  
Lei Lei Qiao ◽  
Li Hong Lan ◽  
...  
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Influence Factors ◽  
Cassava Starch ◽  
Raw Material ◽  
Speed Ratio ◽  
Optimal Conditions

Magnetic cassava starch microspheres have been prepared by means of the method of precipitation magnetization, cassava starch as raw material adsorbing or embedding Fe3O4, many influence factors on magnetic cassava starch iron rate such as pH, reaction time, stirring speed, ratio of Fe+3 to Fe+2, reaction temperature also investigated in this paper. On the base above research, we preliminary got the optimal conditions on the synthesis of magnetic cassava starch microspheres.

Preparation of Sulfur-Free Exfoliated Graphite in the Graphite-HClO4-CH3COOH Systerms

2015 ◽  
Vol 1094 ◽  
pp. 61-67
Author(s):  
Guo Jiang Zhou ◽  
Xiao Tong Feng ◽  
Guang Chao Lv
Keyword(s):  
Reaction Temperature ◽  
Influence Factors ◽  
Reaction Medium ◽  
Volume Ratio ◽  
Chemical Oxidation ◽  
Raw Material ◽  
Exfoliated Graphite ◽  
Mixed Acid ◽  
Preparation Conditions ◽  
Orthogonal Experiments

The sulfur-free exfoliated graphite(EG) was prepared by chemical oxidation method using the mixture of HClO4 and CH3COOH as reaction medium, the 100 orders natural flake graphite(NG) as raw material, and KMnO4 as oxidant. The effects of influence factors on the exfoliation volume(EV) were analyzed by single factor experiments and orthogonal experiments, the structure of NG and EG were characterized by X-ray diffraction. Results show that the optimum preparation conditions were as follows: graphite(g): KMnO4(g): the mixed acid (mL) = 1:0.35:4, HClO4 (mL):CH3COOH (mL) = 3:1, reaction temperature at 35°C for 90 minutes, the maximum EV of up to 500mL/g. The influence factors are governed the descending order: the volume ratio of HClO4 :CH3COOH, reaction temperature, the dosage of mixed acid, the dosage of KMnO4, reaction time.

scholarly journals A Long-Chain Alkylation of Dialdehyde Starch to Improve Its Thermal Stability and Hydrophobicity

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Jiang Zhu ◽  
Zhaodong Wang ◽  
Haitao Ni ◽  
Xiang Liu ◽  
Jian Ma ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Orthogonal Experiment ◽  
Raw Material ◽  
Molar Ratio ◽  
Dialdehyde Starch ◽  
Hydrophobic Properties ◽  
Feed Composition ◽  
Long Chain

Hydrophobic dialdehyde starch (HDAS) was synthesized by dialdehyde starch (DAS) and eighteen-alkyl primary amine as the raw material in DMSO. The effect of the reaction conditions on the yield of HDAS was investigated such as catalyst content, reaction temperature, reaction time, and the in-feed molar ratio of -CHO/-NH2. Moreover, the optimized test parameters were obtained by conducting orthogonal experiment. The molecular structure and the morphology of HDAS were characterized via Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). And the thermal stability and the hydrophobic properties of HDAS were investigated by thermal gravimetric analyzer (TG) and the hydrophobic testing. The results indicate that the yield of HDAS is the highest up to 44.21%, with feed composition 1 : 0.9, reaction temperature 40°C, reaction time 8 h, and acetic acid content 3%. And the introduction of the long-chain alkyl groups into the DAS backbones will ameliorate efficaciously the thermal stability and the hydrophobic properties of DAS, which almost has no effect on the DAS particle size.

Study on the Preparation of Chitosan-Based Resin

2010 ◽  
Vol 160-162 ◽  
pp. 1810-1815
Author(s):  
Jing Xian Li ◽  
Juan Qin Xue ◽  
Ming Wu ◽  
Yu Jie Wang ◽  
Wei Bo Mao
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Experimental Results ◽  
Raw Material ◽  
Cross Linking ◽  
Reactant Ratio ◽  
Experimental Conditions ◽  
Stirring Rate ◽  
Formaldehyde Crosslinking ◽  
New Type

With chitosan as the raw material, a new type of resin material is synthesized through formaldehyde crosslinking. The effects of the reactant ratio, the reaction temperature, the reaction time, the stirring rate and the system pH on the cross-linking rate are studied in detail. The resin material is then characterized by means of IR. The experimental results show that the reaction occurs mainly on the amino and the hydroxyl of chitosan. The chitosan-based resin material with good properties of sphericity and acidresistivity can be prepared under the optimal experimental conditions, which are found to be 1:5 for the ratio of chitosan and formaldehyde, 60°C for the temperature, 1 h for the reaction time, 440r/min for the stirring rate and 10 for the pH.

scholarly journals Esterification of Glycerol with Acetic Acid in Bioadditive Triacetin with Fe2O3/Activated Carbon Catalyst

2020 ◽  
Vol 849 ◽  
pp. 125-129
Author(s):  
Zahrul Mufrodi ◽  
Shinta Amelia
Keyword(s):  
Gas Chromatography ◽  
Acetic Acid ◽  
Reaction Time ◽  
Catalyst Concentration ◽  
Raw Materials ◽  
Volume Ratio ◽  
Raw Material ◽  
Biodiesel Production ◽  
Carbon Catalyst ◽  
Mass Spectometry

Esterification and transesterification processes for biodiesel production generate glycerol which is possible to be converted into triacetin. It is an actractive bioadditive for increasing octane number of fuel. The production of this bioadditive in a biodiesel plant also increases the revenue as raw material comes from biodiesel process production as by-product.This study examines the effects of catalyst concentration and temperature on triacetin production using glycerol from esterification process and acetic acid at volume ratio of 1:3 as raw materials. An activated charcoal as catalyst is activated with sulfuric acid at concentration of 2% and 3% (w/w). The esterification temperatures are varied at 90 and 100°C and the reaction time is set for 3 hours. The samples are taken frequently at certain interval times of 15, 30, and 60 minutes for chemical analysis using Gas Chromatography Mass Spectometry. It is observed that using 2% and 3% (w/w) of catalysts at 90°C and 60 minutes reaction time converts 41.037% and 57.441% of glycerol respectively.

Study on the Saccharification Conditions of Fuel Ethanol from Corn Straw

2014 ◽  
Vol 672-674 ◽  
pp. 172-176
Author(s):  
Min Zhang ◽  
Jin Yang Li ◽  
Hai Bin Fu
Keyword(s):  
Reaction Time ◽  
Ethanol Production ◽  
Reaction Temperature ◽  
Fuel Ethanol ◽  
Orthogonal Test ◽  
Optimal Combination ◽  
Hydrolysis Rate ◽  
Temperature Reaction ◽  
Corn Straw ◽  
Main Factors

To study the saccharification conditions of cellulase on lignocellulose material, this paper used corn straw as the material to do research on the effect of cellulase. The hydrolysis factors, including reaction temperature, reaction time and cellulase concentration, were measured in order to determine the optimal saccharification conditions for fuel ethanol production. The results showed that, when the reaction temperature was 45°C, reaction time was 72 h and cellulase concentration was 60 IU/g, the hydrolysis rate can respectively reach 6.25 %, 14.7 % and 14.4 %. By the analysis of orthogonal test, the main factors effects the saccharification was reaction time. And the optimal combination of saccharification conditions was the reaction time of 54 h, the reaction temperature of 45 °C, and the cellulase concentration of 55 IU/g.

Magnesium Recovery from Desiliconization Slag of Nickel Laterite Ores by Carbonization

2013 ◽  
Vol 813 ◽  
pp. 255-258 ◽  
Author(s):  
Wen Ning Mu ◽  
Shuang Zhi Shi ◽  
Yu Chun Zhai
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Flow Rate ◽  
Temperature Reaction ◽  
Nickel Laterite ◽  
Experimental Conditions ◽  
Solid Ratio ◽  
Carbonation Process ◽  
Laterite Ores ◽  
Orthogonal Experiments

This work examines the recovery of magnesium from desiliconization slag of nickel laterite ores by carbonation process. The effects of reaction temperature, reaction time, liquid/solid ratio and CO2 flow rate on magnesium dissolution are investigated. The optimized experimental conditions of recovering magnesium were gained by the analysis of orthogonal experiments.

Preparation of Na2S from Na2SO4 Using CO

2014 ◽  
Vol 1004-1005 ◽  
pp. 703-706
Author(s):  
Xiao Yi Shen ◽  
Hong Mei Shao ◽  
Zhi Meng Wang ◽  
Yu Chun Zhai
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Conversion Rate ◽  
Raw Material ◽  
Temperature Reaction ◽  
Reaction Conditions ◽  
Material Thickness

Na2SO4 solution that was obtained from ZnSO4 solution after Zn2+ precipitation using Na2CO3 was used as raw material. The Na2SO4·7H2O crystallization was obtained through cooling the Na2SO4 solution, and then the solution was cycled. The Na2SO4·7H2O was dried and then put into a porcelain boat located in a roaster. When the reaction between Na2SO4 and CO ended, the Na2S was obtained. The influences of reaction temperature, reaction time and material thickness on the conversion rate were discussed. The appropriate reaction conditions were reaction temperature 675°C, reaction time 120min and material thickness less than 4cm.

Research on Synthesis Regularity of Epoxysuccinic Acid

2013 ◽  
Vol 316-317 ◽  
pp. 942-945
Author(s):  
Qing He Gao ◽  
Yi Can Wang ◽  
Zhi Feng Hou ◽  
Hui Juan Qian ◽  
Yuan Zhang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Time ◽  
Maleic Anhydride ◽  
Reaction Temperature ◽  
Raw Material ◽  
Molar Ratio ◽  
Mass Ratio ◽  
Synthesis System ◽  
Reaction Conditions ◽  
Sodium Hydrate

The yield of epoxysuccinic acid was obtained by determining the content of unreacted maleic anhydride and tartaric acid as a by-product in synthesis system. This method could calculate the yield of epoxysuccinic acid precisely and overcome the disadvantage of obtaining inpure product by recrystallization method. Epoxysuccinic Acid was synthesized using maleic anhydride as raw material, hydrogen peroxide as oxidizer and tungstate as catalyst. The effects of reaction temperature, reaction time, ratio of materials, dosage of oxidizer and catalyst on epoxidation and hydrolysis reaction was investigated. The results showed that the yield of epoxysuccinic acid was 88% when the reaction conditions were as follows: reaction temperature 65°C, reaction time 1.5h, catalyst dosage 3%(based on mass of maleic anhydride), molar ratio of sodium hydrate to maleic anhydride 2:1, mass ratio of hydrogen peroxide to maleic anhydride 1:1.

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