This is ideal because then the solvent can be evaporated, and crystals from the caffeine can be formed from it, which allows for the decaffeination of the coffee. It’s important that the solvent that’s used is immiscible with the other liquid however2. This will ensure that the solvent and coffee don’t mix together, and will instead form two separate layers that will allow for extraction in the separatory funnels. Dichloromethane is the ideal solvent because it is immiscible with the water, and will allow caffeine to be dissolved in it2. The filtration that happens in the separatory funnels isolates the caffeine and the dichloromethane. The magnesium sulfate helps dry the combined layers of caffeine and dichloromethane, and then the evaporation is what helps to remove the dichloromethane. Then, you’re only left with the caffeine, effectively isolating it. In order to bring it back from the current state its in due to the evaporation however, acetone hot acetone and petroleum ether are needed2. These cause the caffeine to “bottom out”, and turn to a solid. Acetone is polar so it’ll allowed for the dissolving of the caffeine, and the cooling is what helped form the
This is ideal because then the solvent can be evaporated, and crystals from the caffeine can be formed from it, which allows for the decaffeination of the coffee. It’s important that the solvent that’s used is immiscible with the other liquid however2. This will ensure that the solvent and coffee don’t mix together, and will instead form two separate layers that will allow for extraction in the separatory funnels. Dichloromethane is the ideal solvent because it is immiscible with the water, and will allow caffeine to be dissolved in it2. The filtration that happens in the separatory funnels isolates the caffeine and the dichloromethane. The magnesium sulfate helps dry the combined layers of caffeine and dichloromethane, and then the evaporation is what helps to remove the dichloromethane. Then, you’re only left with the caffeine, effectively isolating it. In order to bring it back from the current state its in due to the evaporation however, acetone hot acetone and petroleum ether are needed2. These cause the caffeine to “bottom out”, and turn to a solid. Acetone is polar so it’ll allowed for the dissolving of the caffeine, and the cooling is what helped form the