Preparation of Biodiesel from Soybean Oil by Ultrasound-Assisted Transesterification

2013 ◽  
Vol 773 ◽  
pp. 188-192 ◽  
Author(s):  
Yong Guang Bi ◽  
Hong Chang He
Keyword(s):  
Ionic Liquid ◽  
Reaction Time ◽  
Soybean Oil ◽  
Reaction Temperature ◽  
Ultrasonic Power ◽  
Ester Exchange ◽  
Ultrasound Assisted

Ultrasound-assisted ionic liquid ester exchange Preparation of biodiesel, effects of alcohol to oil ratio, reaction time, reaction temperature, the amount of ionic liquid and ultrasonic power factors on the rate of transesterification. The results showed that ultrasound-assisted ionic liquid soybean oil catalyzed preparation of biodiesel process: ultrasonic power 280W, alcohol-oil ratio of 10:1, 10% of the amount of catalyst is the quality of the raw oil, the reaction temperature of 100 ° C, reaction time 50min, biodiesel yield up to 92.5%.

Study on Pre-Esterification of Trench Oil and Preparation of Bio-Diesel

2013 ◽  
Vol 724-725 ◽  
pp. 1054-1061
Author(s):  
Zhi Hong Xiao ◽  
Ai Hua Zhang ◽  
Wei Wei Jiang ◽  
Hong Qin Zhang ◽  
Chang Zhu Li
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Raw Materials ◽  
Acid Methyl Ester ◽  
Molar Ratio ◽  
Acid Methyl ◽  
Basic Ionic Liquid

In this study, the trench oil was processed by the technology of polyol pre-esterification and the bio-diesel was prepared using basic ionic liquid 1-methyl-3-butyl-imidazole hydroxide as a catalyst. The amount of ionic liquids, alcohol and oil molar ratio, reaction temperature and reaction time were investigated on the transesterification reaction. The results showed that the bio-diesel prepared conditions by trench oil are as follows: alcohol and oil molar ratio of 8:1, reaction temperature 70°C, reaction time 110min and the amount of catalyst for the quality of raw materials 3.0% oil. Under these conditions, fatty acid methyl ester was 95.7% conversion rate.

Production of Low Calorie Oil with Enzymatic Catalysis Method

2012 ◽  
Vol 554-556 ◽  
pp. 1178-1182
Author(s):  
Hui Ling Cui ◽  
Yuan Dong Xu ◽  
Yu Jun Zhang ◽  
Hui Bo Song
Keyword(s):  
Reaction Time ◽  
Soybean Oil ◽  
Reaction Temperature ◽  
Orthogonal Experiment ◽  
Enzymatic Catalysis ◽  
Calorific Value ◽  
Molar Ratio ◽  
Reaction Yield ◽  
Low Calorie ◽  
Glycerol Triacetate

The 1, 3-specific lipase of Lipozymetlim was used as catalyst to produce low calorie oil through the reaction of soybean oil with glycerol triacetate. The effects of catalyst using amount, molar ratio of the substrates, reaction temperature and reaction time on the product yields were investigated. The orthogonal experiment results showed that the optimal reaction conditions were the substrate molar ratio of 2:1, reaction temperature of 60 °C, reaction time of 24 h, and 10 % enzyme adding amount per gram of substrate. Under such conditions, the reaction yield was 79.56 %. After 5 times reuse of the enzyme, the yield still could reach 58.94 %. The calorific value of the product was measured by calorimetric method and the value was 35 027 J/g which was about 75 % of the corresponding value for soybean oil.

Biodiesel Production through Direct Transesterification of Waste Cooking Oil with Alcohol via Ultrasonic Wave

2013 ◽  
Vol 389 ◽  
pp. 12-16
Author(s):  
Yong Feng Kang ◽  
Hua Jin Shi ◽  
Lin Ge Yang ◽  
Jun Xia Kang ◽  
Zi Qi Zhao
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Waste Cooking Oil ◽  
Biodiesel Production ◽  
Molar Ratio ◽  
Ultrasonic Power ◽  
Cooking Oil ◽  
Biodiesel Synthesis ◽  
Optimum Reaction ◽  
Ester Exchange Reaction

Biodiesel is prepared from waste cooking oil and methanol. The ester exchange reaction is conducted under ultrasonic conditions with alkali as the catalysts. Five factors influencing on the transesterification reaction of biodiesel production are discussed in this study, including the reaction time, reaction temperature, catalyst amount, methanol to oil molar ratio, ultrasonic power. A series of laboratory experiments were carried out to test the conversion of biodiesel under various conditions. The process of biodiesel production was optimized by application of orthogonal test obtain the optimum conditions for biodiesel synthesis. The results showed that the optimum reaction conditions were:molar ratio of oil to methanol 8:1,catalysts 1.2g KOH/100g oil,reaction temperature 70°C, reaction time 50 min,Ultrasonic power 400W. The conversion may up to 96.48%.

Ultrasound-Assisted Acceleration of Soybean Oil Epoxidation and the Interfacial Tension Study

2011 ◽  
Vol 201-203 ◽  
pp. 2583-2586 ◽  
Author(s):  
Li Juan Han ◽  
Lin Li ◽  
Guo Qin Liu
Keyword(s):  
Fatty Acid ◽  
Reaction Time ◽  
Interfacial Tension ◽  
Soybean Oil ◽  
Ultrasonic Irradiation ◽  
Reaction Rate ◽  
Ultrasonic Frequency ◽  
Ultrasonic Power ◽  
Operational Parameters ◽  
Epoxy Value

This work was to reduce the epoxidation time of soybean oil with the assistance of ultrasonic irradiation and a kind of fatty acid as the catalyst in the presence of formic acid as the carrier of reactive oxygen. The operational parameters affecting the epoxy value of soybean oil, such as the amount of fatty acid and the ultrasonic frequency, ultrasonic power and reaction time were studied. And the interfacial tension of the aqueous-oil phase was decreased with the catalyst fatty acid adding or the assistance of ultrasonic irradiation, therefore the reaction rate could be accelerated. The maximum epoxy value of epoxidized soybean oil was 17.19% increased compared with the epoxy value that treated by non-ultrasound assistance in the same reaction time. Experimental results indicated that the epoxy value could be enhanced under the ultrasonic irradiation assistance, where the reaction time could be effectively reduced.

Research of Synthesizing Biodiesel from Suaeda Salsa by Ultrasonic-Assisted Transesterification

2011 ◽  
Vol 189-193 ◽  
pp. 3925-3931 ◽  
Author(s):  
Qing Li Yang ◽  
Feng Zhu ◽  
Jie Sun ◽  
Song Qin
Keyword(s):  
Reaction Time ◽  
Production Rate ◽  
Reaction Temperature ◽  
Biodiesel Production ◽  
Suaeda Salsa ◽  
Ultrasonic Frequency ◽  
Ultrasonic Power ◽  
Technological Parameters ◽  
Ultrasonic Assisted ◽  
Catalyst Dosage

Suaeda salsa oil was taken as raw materials to produce biodiesel by ultrasonic-Assisted transesterification. Single factor experiment and the orthogonal experiment combination design were adopted to study the effects of ultrasonic frequency, ultrasonic power，reaction temperature ，reaction time，catalyst dosage and mole ratio of methanol to oil on biodiesel production rate. The order of factors that influence the biodiesel production rate within the experimental range was as follows: catalyst dosage＞reaction time＞reaction temperature＞mole ratio of methanol to oil. The optimal technological parameters should be as follows: ultrasonic frequency 28kHz, ultrasonic power 210W, reaction temperature 65 , reaction time 10min,catalyst dosage 0.3%and mole ratio of methanol to oil 6, and biodiesel production rate is 97.93% under such conditions.

Ultrasonic Preparation and Reactivity of 4,5-dihydro-1H-pyrazole Derivatives

2021 ◽  
Vol 17 ◽  
Author(s):  
Ahlem Guesmi ◽  
Naoufel Ben Hamadi
Keyword(s):  
Reaction Time ◽  
Synthesis Method ◽  
Dipolar Cycloaddition ◽  
Ultrasonic Power ◽  
Pyrazole Derivatives ◽  
Effect Of Solvent ◽  
Power Frequency ◽  
Ultrasonic Preparation ◽  
Ultrasound Assisted

: The regiospecific synthesis of 1H-pyrazole derivatives has been accomplished through the 1,3-dipolar cycloaddition of aryldiazoalkane to but-3-en-2-one. A convenient and inexpensive ultrasound-assisted preparation of cyclopropenes in good yields has been realized. The effect of solvent, ultrasonic power, frequency, reaction time and temperature of cyclopropenation were studied and the order of yield indicates Ultrasound, 25 KHz > Ultrasound, 40 KHz > conventional synthesis method.

Alkylation of Phenol with Cyclohexanol Catalyzed by Acidic Ionic Liquid

2011 ◽  
Vol 233-235 ◽  
pp. 188-193 ◽  
Author(s):  
Hai Bing Yu ◽  
Jun Nan ◽  
Jing Cheng Zhang ◽  
Jian Zhou Gui
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Reactant Ratio ◽  
Temperature Reaction ◽  
Reaction Conditions ◽  
Acidic Ionic Liquid ◽  
Optimum Reaction

Alkylation of phenol with cyclohexanol catalyzed by acidic ionic liquid has been investigated. The influences of reaction temperature, reaction time, reactant ratio (mol ratio of phenol to cyclohexanol), the amount and the recycle of ionic liquid on catalytic activity were studied. The conversion of phenol and the selectivity of paracyclohexylphenol were 75.5% and 61.6%, respectively, under optimum reaction conditions. The ionic liquid was utilized repeatedly over three times without remarkable loss of catalytic activity．

Synthesis and Preparation of Desulfurization Concerned Naphthenic Acid Type Ionic Liquid

2014 ◽  
Vol 670-671 ◽  
pp. 224-228
Author(s):  
Qiang Wang ◽  
Guo Bi Li ◽  
Peng Cheng ◽  
Shi Dong Wang ◽  
Shu Liang Zang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Reaction Time ◽  
Crude Oil ◽  
Reaction Temperature ◽  
Naphthenic Acid ◽  
Process Conditions ◽  
Liquid Density ◽  
Physical Measurements ◽  
Acid Type

This paper describes the types and characteristics of ionic liquids, synthesis and application of ionic liquids in chemical and environmental applications, and naphthenic acid corrosion problems and research on ionic liquids are organically combined together, using properties, good stability and easy separating from crude oil, of ionic liquid generated by imidazole and naphthenic acid, exploring the ionic liquid deacidification process conditions and acid removal effect. The naphthenic acid and imidazole react in acetone solvent, synthesis a series of ionic liquids in different reaction ratio, reaction temperature, reaction time and stirring speed conditions,makesome physical measurements and calculation of the yield of these ionic liquids and. The results show that, in naphthenic acid and imidazole molar ratio of 1:1, reaction temperature 70°C, reaction time 7h, stirring speed 400R / min, stand half hour after reaction, the yield of naphthenic acid type ionic liquid is maximum, namely, the deacidification effect is best. At the same time measured in the ionic liquid density is 1.179g / mL, and pH is 5.8. Obtained optimum synthesis condition of naphthenic acid type ionic liquid, greatly improving the deacidification rate of high acid crude oil, more importantly, the method does not cause any pollution to the environment.

Synthesis of Benzaldehyde 1, 2-Propanediol Acetal by Using Ionic Liquid [Hmim]HSO4 as Catalyst

2012 ◽  
Vol 550-553 ◽  
pp. 400-403 ◽  
Author(s):  
Xue Nan Sun ◽  
Li Cui ◽  
Tong Kuan Xu ◽  
Da Zhi Wang
Keyword(s):  
Ionic Liquid ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Raw Materials ◽  
Product Yield ◽  
Experimental Results ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Good Catalyst ◽  
Optimal Reaction

Benzaldehyde 1, 2-propanediol acetal was synthesized from benzaldehyde and 1, 2-propanediol in the presence of ionic liquid [HMIM]HSO4. The effect of the amount of catalyst, reaction time, reaction temperature, and the molar ratio of raw materials agent on the product yield was investigated respectively. Experimental results demonstrate that ionic liquid [HMIM]HSO4is a good catalyst for preparation of benzaldehyde 1, 2-propanediol acetal. Results showed the optimal reaction conditions are as follows: the mole ratio of benzaldehyde to 1, 2-propanediol is 1：1.3, the amount of catalyst is 3.0g, the reaction temperature is 343K, and the reaction time is 4h. The achieved yield of acetal is 78. 7%.

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