Isopropyl alcohol is a "great idea", it draws water and alkali into itself (the indicator then screams at you that you have alkali in the alcohol), and it itself is soluble in water... We do not dry the alcohol from water before neutralization, only fools do it correctly... And then we get a mixture: amine sulfate and sodium sulfate or potassium sulfate. The method should be called how to lose a lot and quickly...
Isopropyl alcohol is a "great idea", it draws water and alkali into itself (the indicator then screams at you that you have alkali in the alcohol), and it itself is soluble in water... We do not dry the alcohol from water before neutralization, only fools do it correctly... And then we get a mixture: amine sulfate and sodium sulfate or potassium sulfate. The method should be called how to lose a lot and quickly...
Hello. NaOH solubility in IPA is negligible at room temp so that NaSO4 admixture will be insignificant. This is quick method, ofc it's worth to get rid of water in case of large scale procedure.
Hello. NaOH solubility in IPA is negligible at room temp so that NaSO4 admixture will be insignificant. This is quick method, ofc it's worth to get rid of water in case of large scale procedure.
And how much water is in this isopropyl alcohol..., even if isopropyl alcohol is dried with anhydrous sodium sulfate, about 5 percent of water will remain in it. But I remind you that no one dried alcohol in the method at all, and there is enough water there to dissolve the alkali. For a quick method, you need to at least use a non-polar solvent, which dissolves a minimum amount of water in itself. So this method is a complete 0.
And how much water is in this isopropyl alcohol..., even if isopropyl alcohol is dried with anhydrous sodium sulfate, about 5 percent of water will remain in it. But I remind you that no one dried alcohol in the method at all, and there is enough water there to dissolve the alkali. For a quick method, you need to at least use a non-polar solvent, which dissolves a minimum amount of water in itself. So this method is a complete 0.
Patton is of course a little strange that you write from another account, but like your own post) Well, okay, this is your business)))
I wrote the main nuances above, even any methods do not need to do not clean in isopropyl alcohol, but use petroleum ether for these purposes. Sometimes you just need to admit your obvious mistakes, only one who does nothing is not mistaken. Sometimes you can say thanks if someone tells you weaknesses and explains why.
Patton is of course a little strange that you write from another account, but like your own post) Well, okay, this is your business)))
I wrote the main nuances above, even any methods do not need to do not clean in isopropyl alcohol, but use petroleum ether for these purposes. Sometimes you just need to admit your obvious mistakes, only one who does nothing is not mistaken. Sometimes you can say thanks if someone tells you weaknesses and explains why.
Firstly, there is no hatred, I am here only when I have free time and desire to help users who have problems with synthesis. If my responses to your posts offend you, well, I can completely ignore your posts.
Secondly, specifically in relation to your mistakes, I have explained everything to you in more than detail and will again if you can refute the following statements:
1. Water is soluble in isopropyl alcohol, as is alcohol in water.
2. Sodium or potassium hydroxide are soluble in water, slightly soluble in pure alcohol, but have good solubility in a mixture of alcohol and water.
3. Drying alcohol with anhydrous sodium sulfate does not completely dehydrate isopropyl alcohol (this information is available in the practical classes), but there is no drying in the method itself.
4. In your reaction, foreign salts are formed as an additional impurity, due to the above-mentioned reasons, and the free base is also partially washed out, since alcohol, which partially dissolves in water, also takes with it part of the amine base.
Firstly, there is no hatred, I am here only when I have free time and desire to help users who have problems with synthesis. If my responses to your posts offend you, well, I can completely ignore your posts.
Secondly, specifically in relation to your mistakes, I have explained everything to you in more than detail and will again if you can refute the following statements:
1. Water is soluble in isopropyl alcohol, as is alcohol in water.
2. Sodium or potassium hydroxide are soluble in water, slightly soluble in pure alcohol, but have good solubility in a mixture of alcohol and water.
3. Drying alcohol with anhydrous sodium sulfate does not completely dehydrate isopropyl alcohol (this information is available in the practical classes), but there is no drying in the method itself.
4. In your reaction, foreign salts are formed as an additional impurity, due to the above-mentioned reasons, and the free base is also partially washed out, since alcohol, which partially dissolves in water, also takes with it part of the amine base.
These are all empty words
Where are the submitted calculations or links to research? Specifically your practical data? Where are the numbers backed up by experience?
And how much water is in this isopropyl alcohol..., even if isopropyl alcohol is dried with anhydrous sodium sulfate, about 5 percent of water will remain in it. But I remind you that no one dried alcohol in the method at all, and there is enough water there to dissolve the alkali. For a quick method, you need to at least use a non-polar solvent, which dissolves a minimum amount of water in itself. So this method is a complete 0.
1. This is the most basic knowledge that in almost all workshops on organic chemistry for beginner chemists of organics.
2. Also, according to your paper indicator in the video, it is clear that in a solution of alcohol there is alkali, and not just a free Amin.
3. You can produce similar expirification, but without adding amin, using only isopropyl alcohol and sodium hydroxide solution, and at the finish stage, your alcohol will show a very alkaline reaction, by the titration of the finish solution of alcohol, you will get the value of the impurity mass.
I will not continue the discussion with you, since it is meaningless, especially after your words that you can consider my words an insult and block my account.
