HippyDippy
Rising Star
So on re-crystallization... How many times does one have to go through the process? SWIM started with a couple of pretty dark paste like materials. SWIM likes to evap the whole run rather than freezer precipitate because they are very impatient. They are working on this though, and have questions...
So the 2 papers on the right are runs that had a lot of goo in them to begin with. They were washed with sodium carbonate water and then 3 batches of clean water, which removed most of the goo. But then SWIM got impatient and just evapped the washed solutions instead of freezer precipitating.
Now, both of the 2 papers on the right were scrapped into a jar for re-crystallization using heptane. After sitting in the freezer for 48 hours, the jar had 3 substances in it. It had some stuff that looks sorta like salt, some silty tan solution, and yellow heptane. The yellow heptane, and as much of the tan silt that could be had was pipetted out of the jar. This left a sandy brown salt that was scrapped from the jar and went into the vacuum chamber to finish drying out.
Should this be continued to be recrystallized, and if so, how many more times will it take to make shards or white powder?
So the 2 papers on the right are runs that had a lot of goo in them to begin with. They were washed with sodium carbonate water and then 3 batches of clean water, which removed most of the goo. But then SWIM got impatient and just evapped the washed solutions instead of freezer precipitating.
Now, both of the 2 papers on the right were scrapped into a jar for re-crystallization using heptane. After sitting in the freezer for 48 hours, the jar had 3 substances in it. It had some stuff that looks sorta like salt, some silty tan solution, and yellow heptane. The yellow heptane, and as much of the tan silt that could be had was pipetted out of the jar. This left a sandy brown salt that was scrapped from the jar and went into the vacuum chamber to finish drying out.
Should this be continued to be recrystallized, and if so, how many more times will it take to make shards or white powder?