Of course I had to fuck with this solution.
Fractional crystallization is just necessary to move on and know what you got.
Now, thanks to this hellish work, it is known that the desired substance crystallizes at the very end, forming a viscous solution.
Therefore, I think it is better to correct the acidity with terephthalic acid. An even more concentrated solution can be obtained. You can also pour excess terephthalate into the electrolyser. One dick disappears.
For electrical conductivity, I think it is better to use sodium sulfate. These are the notes.
So: the substance that precipitates with needle crystals is nothing but dynatry of phosphate. This is confirmed by the temperature of the crystal hydrate about 35 and the fact that it stands up in the refrigerator with a stake from the hexa hydrate or something like that. There is a lot of it and it is spread out in 2 factions.
Next comes the sodium terephthalate. It's something like 70 grams. He constantly climbs during evaporation and freezing in all factions. Fine powder.
The final substance itself apparently does not crystallize even in morolysis and forms a viscous solution which can only be neatly evaporated on a tray. It must be sodium methyl benzoate hydroxy. According to the patent, it must crystallize when frozen but shit. Probably because of impurities.