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Biodiesel is produced by unused or used vegetable oils (edible and unedible) and animal fat through a variety of chemical processes, the most common of which is esterification. Methyl ester, ethyl ester or higher alcohol ester is produced from triglyceride (the main ingredient of all natural oil and fat). Fatty acid esters are formed by triglycerides and alcohols in the presence of catalysts. The physicochemical properties of fatty esters are similar to those of petroleum based diesel oil.
The raw materials used to produce biodiesel vary from country to country, and the technology used is also different. The United States uses soybean seeds and animal fat, Europe uses rapeseed and animal fat, Japan uses animal fat, Malaysia uses coconut oil seeds, and India uses non-edible vegetable oils. Biodiesel is widely used in Europe and North America using excess vegetable oil and soybean oil as raw materials.
Environmentally friendly biodiesel technology:
Since 2000, the introduction of foreign advanced technology combined with our inherent technology, through a number of user practice, the development of an international advanced level of environmental protection biodiesel technology.
Main process: a kind of biodiesel catalyst was specially developed. The methyl ester was purified by dry cleaning and anhydrous dry cleaning.
Main features: high conversion rate, no waste water production, high product quality.
Mini Type(100L--1000L/D)
Large scale capacity Biodiesel equipment:30-500TPD
1. Trench oil for biodiesel
Raw demolition .jpg trench oil for biodiesel At present, more swill oil, urban gutter oil, refined waste as raw materials With simple operation, advanced technology, short reaction time and high quality, the conversion rate can reach more than 95%.
Main Process:
After dry acidizing oil and excipients, the catalyst was put into the reactor with heating and stirring, stirred and heated to the reaction temperature, part of the vaporization of the excipients and the water vapor formed by the reaction were entered into the distillation column together, and then the moisture was removed and then refluxed to the reactor to participate in the reaction.
After the reaction, the unreacted excipients were distilled out, and the reaction products were pumped into the water washing and dehydration pan. First, they were washed to neutral in turn with hot water, and then heated and dried and dehydrated. Finally, biodiesel was obtained by feeding it into a high temperature distillation kettle and rectifying and purifying it. Distillation residue is plant asphalt.
2.Vegetable oil for biodiesel
Using the biodiesel catalyst specially developed by our
company, the conversion rate is increased, the container is not corroded, and there is no residue.
Basic process:(for example Canola oil)
Twice time Reacting step
Canola oil and methanol, catalyst in caustic soda existence condition happened methyl continuous change. After two level methyl ester reaction go to the water washing process,which get the pure Methyl ester.
canola oil heated add into the methanol and catalyst on the first level reaction, parts of the fatty acid is changed into the methyl.This level of rapeseed oil was almost a methyl ester changed, The mixture of glycerol and methanol,methyl ester continuously is bringed out. Use one Centrifuge to separate the mixture of the first level reaction. Separate the rape oil/methyl ester and glycerol/methanol mixture. Methanol and glycerol in the subsequent process is recovery. In the second reaction of methyl further change the rape oil into methyl ester with adding the methanol and cyclast. Use the second Centrifuge to separate the two phase.
Twice time Washing step
In the first time use the normal soft water, the second use added acid water. Use the Centrifuge to separate washing water. Washed rapeseed oil methyl is dried via the vacuum,then use the heat exchange for cooling it .
The esterification reaction is one balance process,which the balance is relevant with the reaction temperature, pressure and catalyst .
This process can also be applied to other animal and plant oil methyl ester.
Recovery of methanol
The residual methanol of Rape oil methyl ester is removed out and back to the process through evaporation .
Refinery of the Glycerin
Each production 10 tons of biological diesel , it can produce 1 ton of crude glycerin.
It is very necessary for refining the glycerin for increasing the yield .
The characteristic
Due to the reaction is divided into two steps, each reaction generated glycerin is centrifugal separation, methyl ester reaction degree can be more than 99%.
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