Removal of Peroxides From Organic Solvents Using Aluminum Oxide Sorbent

  • Date:Tuesday, Oct 31, 2023
Removal of Peroxides From Organic Solvents Using Aluminum Oxide Sorbent


Making sure organic solvents are of high purity levels is essential for the successful completion of various experiments and processes in the chemical industry. Peroxides, which can contaminate organic solvents, are a major concern and threat in chemical experiments, applications, and processes due to their potential to compromise experimental results and even create safety hazards. Column chromatography is an efficient procedure for the removal of peroxides from organic solvents using Aluminum Oxide.

Aluminum oxide column chromatography is an effective method for removing peroxides from solvents. Aluminium oxide al2o3 is an efficient adsorbing material that attracts and holds peroxides onto its surface, thus separating them from the organic solvent and allowing for the collection of the purified solvent from the mixture. This method is relatively inexpensive and effective and can remove peroxides even at very low levels from the solvent mixture.

Aluminum oxide is a great adsorbent for getting rid of peroxides in organic solvents when you're doing column chromatography. It works by breaking down the peroxide in the solvent and then making a chemical and physical bond between the adsorbent and the peroxide compounds.

How Does Aluminum Oxide Work To Remove Peroxides From Organic Solvents?

Aluminum oxide is a great adsorbent for getting rid of peroxides in organic solvents in the column chromatography technique. The process of removing peroxide from an organic solvent is usually a combination and sum of chemical and physical reactions between the peroxide and the adsorbent.

Aluminum oxide has a big surface area and selective chemistry organic properties on its surface, which means it can adsorb the peroxide molecules efficiently from the mixture of organic solvents. Aluminum oxide has active spots like hydroxyl groups on its surface that can form chemical bonds with the molecules of peroxide. These active spots and the peroxide molecules dispense/transfer electrons during this chemical interaction, thus neutralizing the peroxide molecules.

Aluminum oxide can form hydrogen bonds with peroxide compounds and molecules, thus the oxygen atoms in the peroxide molecule bond with the hydrogen atoms on the aluminum oxide's surface, which means they can be easily adsorbed and are trapped inside by the adsorbent material used in the column chromatography method.  

The pores in aluminium oxide al2o3 are often porous, with different sizes of pores. These pores function as tiny chambers in which the peroxide molecule can get trapped physically, and thus get effectively separated from the mixture of organic solvents. Since there is a size mismatch between the two molecules, larger molecules cannot pass through the pores and are instead trapped inside the aluminum oxide material during column chromatography’s procedure/phases.

Performing Column Chromatography For Peroxide Removal From Organic Solvents Using Aluminum Oxide

If you want to get rid of peroxide from your organic solvent using aluminum oxide, you can use the column chromatography process. It's a systematic and efficient way to make sure the chemical analysis is pure and free of peroxide compounds.

You can start by setting up the chromatography column and picking the right column size based on how much solvent you need to clean and purify. You can add a stopper or glass wool plug at the bottom of the column to stop the aluminum oxide from flowing out. Make sure to use a column that is tall enough to hold the desired amount of aluminum oxide and solvent.

When selecting aluminum oxide, it is important to consider the grade and size of the particles, taking into account the solvent chemical analysis and the amount of organic peroxides present. Generally, it is necessary to heat the aluminum oxide in an oven in order to eliminate any impurities and make it suitable for the absorbency process.

Now, you can add the activated aluminum oxide to the top of the column on the layer of adsorbent beads. Pack the aluminum oxide tightly into the column to avoid any gaps and this may also help with an efficient separation process. Pour the organic solvent with peroxides on the top part of the column and let it flow through at a steady pace. The peroxide will stick to the aluminum oxide and the solvent will settle in the flask.

Once the solvent has passed through the column, the column should be rinsed with a minimal amount of fresh solvent in order to eliminate any remaining peroxide from the column. The eluted solvent should then be collected in the receiver flask. Make sure to use a controlled flow rate to avoid disturbing the column packing.

Towards the end of the chromatography process, you should collect the eluted solvent in fractions, which will allow you to test each fraction for organic peroxides, separation effectiveness, and purity of the fractions and compounds that were eluted.

If the eluted solvent from the column contains peroxides, you can perform the procedure multiple times and continue to elute the column until the solvent is peroxide-free and pure in nature.

It is essential to take precautionary measures when performing the chromatography method due to the potential hazards associated with peroxides, such as the need to wear gloves and make sure you follow eye protection pointers. Additionally, it is also recommended to work in an area that has adequate ventilation to reduce the risk of exposure to peroxides. Do not use Aluminum Oxide Column Chromatography to purify solvents known to be oxidized by aluminum oxide, this may cause adverse chemical reactions.

When conducting column chromatography for the removal of peroxide using aluminum oxide, the following steps can be employed to effectively purify the organic solvent, thus allowing it to be used in various chemical processes without any adverse effects due to contamination caused by peroxide compounds.