What is interesterification process?

What is interesterification process?

The interesterification process is used to modify the physical properties of the oil or fat blend by rearranging the fatty acid groups within and between the different triglycerides. It is applied directly to naturally derived oils or fats, or to hydrogenated or fractionated oils.

What is the purpose of interesterification?

The purpose of the interesterification is to change the physical (melting) properties of the resulting fats to fit them more closely to those desired for food or other purposes.

Which catalyst is used in the process of refining pure biodiesel?

Strong alkali catalysts such as NaOH, KOH, CH3ONa and CH3OK (potassium methoxide) are used for biodiesel production. However, alkali metal alkoxides are found to be more active than hydroxides [26].

How do you synthesize biodiesel?

Biodiesel is synthesized via the transesterification of lipid feedstocks with low molecular weight alcohols. Currently, alkaline bases are used to catalyze the reaction. These catalysts require anhydrous conditions and feedstocks with low levels of free fatty acids (FFAs).

What is the difference between transesterification and interesterification?

is that transesterification is (organic chemistry) the reaction of an ester with an alcohol in order to replace the alkoxy group; it is used in the synthesis of polyesters and in the production of biodiesel while interesterification is (chemistry) the reaction of an ester with an alcohol in order to obtain a different …

What is the difference between hydrogenation and interesterification?

Hydrogenation is used to improve the oxidative stability of oil and to modify the physical characteristics by reducing the double bonds ( 2). Interesterification changes the distribution and positions of fatty acids within and among triglycerides to change the physical properties and behaviors of oil ( 2).

Is Interesterification good?

There is not much research on its safety. One study shows interesterified fat had the same unhealthy effects as trans fat, raising the bad LDL cholesterol and lowering the good HDL cholesterol. Interesterified fat may also raise blood sugar as much as 20 percent in some people.

Can biodiesel be made with ethanol?

Of Course Yes, Biodiesel can be produced by the reaction of vegetable oil with any alkyl source such as methanol, ethanol, dimethyl carbonate, methyl acetate, ethyl acetate…. etc. In general, Biodiesel is obtained first as FAME via : Esterification of FFAs of High FFAs vegetable oils (acid catalyzed).

Why is methanol used to make biodiesel?

Methanol and ethanol are the most often used alcohols in biodiesel production. Methanol is particularly preferred because of its physical and chemical advantages. Beside its reaction with triglycerides is quick and it can be easily dissolved in NaOH [57].

What are the stages for biodiesel production process?

The major steps required to synthesize biodiesel are as follows:

• Feedstock pretreatment.
• Reactions.
• Product purification.
• Transesterification.
• Base-catalysed transesterification mechanism.
• Supercritical process.
• Ultra- and high-shear in-line and batch reactors.
• Ultrasonic reactor method.

How is biodiesel made?

The production of biodiesel (fatty acid methyl esters) is based on the transesterification reaction of triglycerides with methanol. In this process, low purity glycerol is formed as a byproduct, reducing the economy of the process.

How is interesterification catalyzed?

Interesterification is catalyzed by an alkaline catalyst or by a lipase enzyme. The most commonly used alkaline catalysts are sodium methanolate and sodium ethanolate. The early interesterification process was used to extend the plastic range of lard used as shortening.

How is interesterification of triglyceride catalyzed?

Interesterification involves a rearrangement or reshuffling of the fatty acids on the glycerol backbone of the triglyceride molecule. Interesterification is catalyzed by an alkaline catalyst or by a lipase enzyme. The most commonly used alkaline catalysts are sodium methanolate and sodium ethanolate.

How do you make biodiesel and glycerin from fatty acids?

The three attached carbons with hydrogen react with OH- ions and form glycerin, while the CH 3 group reacts with the free fatty acid to form the fatty acid methyl ester. Figure 9.9 is a graphic of the necessary amounts of chemicals needed to make the reaction happen and the overall yield of biodiesel and glycerin.