#azeotrope

[k-star-holic]

Song Joong-ki 'Visual of the Azeotrope Prince'

Source: k-star-holic.blogspot.com

[unistarchemicalcom-blog]

You will be provided with the safer chemical azeotrope alternates for tomorrow. You can use these chemicals for the dry cleaning, electronic, medical and foam blowing as well as cleaning needs.

[unistarchemicalcom-blog]

To clean the azeotrope equipment you can use the high quality of safe chemical cleaning solvent. Unistar Chemical is the perfect platform where you can get the best solution and clean all types of equipments with the excellent services.

[labphoto]

Azeotropic water removal from a reaction mixture with a Dean-Stark trap.

Azeotrope is a mixture of two compounds in a specific ratio what boils lower than each of the two solvents. Why is this good? I have a solution in benzene with a little water and water has a boiling point at 100 °C, while benzene boils at 80,1 °C. If I would like to remove the water by distillation, the normal method would be to distill first the benzene, than the water, since the benzene has a lower boiling point. But luckily these two forms an azeotrope mixture what boils at 69,3 °C what is lower than the benzene and the water separately. So with this I could distill the water out from the benzene under the boiling point of these two an because this two solvents are unmiscrible, I could easily separate them from each other.

Interesting fact: absolute ethanol was made by adding benzene to 95,5 % ethanol (what is also an azeotrope mixture with water) and they distilled out the remaining water with benzene, than distilled the remaining excess benzene too. Luckily now they use the non toxic cyclohexane instead of the benzene. 

[labphoto]

Removing the water from a reaction with a Dean-Stark water trap. 

The toluene what is a solvent in this case forms an azeotrope with water what boils at 84.1 °C while pure toluene boils at 110.8 °C and this azeotrope contains 79.8% toluene by weight, the rest is water. The mixture distills out from the flask, condenses down on a condenser (not on the picture, but its above the trap at the left side) and the water is collected in the trap, since it is not miscible with toluene and it has a higher density.

Did you know that in the chemical industry they dry almost everything with azeotropic water removal? Solid desiccants (magnesium sulfate, calcium chloride, magnesium sulfate, ect.) are non reusable and generate a lot waste, while solvents could be used several times and they remove every water what is present. The most often used solvents for drying is ethyl acetate, isopropyl acetate, toluene.

[carmellehomez]

13 different attitudes that clash every now and then. 13 different views on life. 13 different people trying to make their way through college. 13 strong individuals. We are UP AChES' 2012-B- Azeotrope. We might have started as strangers forced to be together during the application process. But now, we are each other's family. Here are 13 facts to about us. 13 facts because we are 13. ♥ 1. We know that whatever may come our way, we know we will have each other for support. 2. We treat each other as brothers and sisters. 3. We are blatantly frank about each other's negativities and we talk it out. When things are settled, things between us wouldn't change. 4. We don't give a f*** about what people would say about us. We would never change just to fit in. 5. We might never get the spotlight for a long time but when you least expect it, we will surprise you of how much we could do. 6. We are a crazy bunch of people who have fun in our own ways. 7. We are willing to back up each other when we know on of us is being mistreated. 8. We are each other's shoulder to cry on. We know what to say to make each other better. 9. We may have other organizations but the bond we've formed with each other could not be compared to others. 10. When one of us heads an activity, be sure to find most of us in that activity for support. 11. We are a bunch of vain people. Yeah. Just look at how many pictures we could have from a single gathering. 12. We always plan outings but not one of the planned outings has pushed through. 13. We work hard but we play harder. It amazes me how we changed and touched each other's lives. God knows how thankful I am to have these crazy bunch of people around me. They have greatly changed my college life. I might have regretted a lot of decisions I've made in college but one thing is for sure, I don't regret meeting these people. They have made my college life more colorful and they made me see the world in a different perspective. There are no words to express how much I really feel for them. I remember one time when one applicant asked me if I think our batch have this "batch unity" organizations teach their applicants. As I was telling her about the kind of batch unity we have in the batch, tears fell down my eyes. Those were tears of joy; tears that could explain what I was trying to say that words couldn't suffice. We have this kind of batch unity wherein it is only us who could understand. We might not be always complete during the organization's activities or we might not be always complete in pictures but we have this unspoken rule to always support one another. We know we could always run to each other in times when we have problems- may it emotionally or financially. Azeotrope, bebes, batchies, babies, if you are reading this. I love you so much from the bottom of my heart. Walang halong plastikan to guys. Mahal ko talaga kayo. :*

[florangela-blog]

[suburban-warrior]