Solvent Distillation: Solvent Recycling At It’s Best
One of the most important processes in industry is solvent distillation. Through this, the separation of liquids of different volatility levels is done. So, how is this process performed? Throughout the process, the amount of heat is controlled, causing one of the solvent liquids to
evaporate. This leaves behind the less volatile solvent liquid. The next question probably is “What happens to the evaporated liquid?” It can be gathered and cooled down if necessary. Otherwise, the evaporated liquid may just be discarded. To obtain very pure liquid, the process must be done over and over. Simple distillation, fractional distillation, steam distillation and vacuum distillation are some techniques that may be performed to separate various solvents.
Let us start discussing about simple distillation. If you have 2 liquids whose boiling points are very much different, simple distillation may be applied to separate these 2 liquids. Liquids with a boiling point difference of 30 degrees Celsius may be separated through simple distillation. How is this separation technqiue done? You have to make sure that the temperature of the mixture does not reach the boiling point of the liquid with lower volatility level by simply heating the
mixture. This results to the evaporation of the more volatile liquid. The liquid which has the greater boiling point is left behind.
What if you have 2 liquids whose volatility is similar? Can you still make use of simple distillation? The answer is No. In this case, fractional distillation comes in. In this process, a fractionating column is used to collect the vapors when heat is applied to the mixture. Inside the fractionating column, the liquid with higher volatility level turns into vapor and is gathered in another container or chamber where it cools down and returns to its liquid phase. On the
other hand, the liquid with greater boiling point is cooled down and comes dripping back. Can fractional distillation still be used when there are more than 2 liquids? Yes, of course. All you have to do is extend the fractionating column so that there will be more chambers where each liquid may be gathered.
Solvent Distillation: Using Heat in the Distillation Process
Can liquids very sensitive to heat still be separated? To answer this question, it is best that steam distillation be discussed. If a certain liquid mixture is very sensitive to heating, it will be applied with bubbles of steam. This will actually produce the same effect – vaporize the mixture. The more volatile liquid compose most of the vapors that were produced. You will need another column to collect these vapors. Allow the vapors to cool down in the column. After some time, a layer of oil and water will be formed. The last separation technique worthy of discussion is called vacuum distillation. You will have to employ this process when you have to separate not so volatile lqiuids. With this, you will make use of rotary evaporators and other devices. How does this apparatus work? This device reduces the mixture’s pressure until such time that the pressure of the vapors produced is reached. Once you have successfully finished this, you do not have to use too much heat in the distillation process and you will find ti easy to utilize the standard vaporization.
Nowadays, operation expenses are getting costly. That is why it is very wise to incorporate practices that will lessen the expenses. One of the most expensive operations is the disposal of the hazardous wastes. To some, it may be surprising to know that they can recycle and re-use some hazardous wastes. Solvent distillation is the solution to this. Solvent distillation can make this happen. In the end, businesses benefit from solvent distillation as they can save the money that they have alloted for hazardous waste disposal and purchase of new solvents. Companies also become earth – friendly when they employ solvent distillation. The practice of recycling or reusing solvents does not cause problems to the environment. If you try to dig deeper, companies can earn some more when they qualify for the government’s tax credit offers. Another thing, companies do not have to worry about the transportation of hazardous wastes as the risk, like spills or accidents, of doing so will be lessened. Companies are then advised to incorporate solvent distillation and to contact a reputable company to carry out the process. Solvent Distillation Inc and its Proprietary Mobile Solvent Distillation Systems are huge when it comes to your busy and its solvent recycling, contact us today.