Opinions - Question with freezing codeine

[Yazzer22]

My dog was cold water extraction codeine (8mg / 300mg acetaminophen) the other night, and he was wondering if he possibly messed up the process. My dog started off by grinding down the pills to a powder, then putting the powder in cold tap water for 10 minutes while constantly stirring, then after the 10 minutes, he heated the solution up in a hot water bath he created using heating up water on the stove. After the solution got considerably warmer, but not boiling, he then proceeded to filter it through 2 unbleached coffee filters that were already soaked in water then dried a little bit so the codeine solution wouldn't soak into the filter itself. The solution was filtered, and the white goopy stuff was left on the coffee filter.

Now here is where my dog was wondering if he had messed things up.

After it was filtered, he then put the solution in the freezer to get it cold. He ended up leaving it in the freezer a tad too long, and a little bit of it froze, like a thin ring around the inside of the glass and a bit of a thin frozen layer on the top the size of a coin, so not that much was actually frozen, just a thin layer on the top of the solution in the glass.

When he discovered this, he immediately took it out of the freezer and put the mixture through another coffee filter. A little bit of goop except this time it was frozen was filtered out of it, and the resulting liquid at the bottom was very clear but a little cloudy.

Did my dog ruin the process by freezing it at all, or is it fine. His thinking was that since acetaminophen already has a low solubility in water at room temp and it only gets less soluble the colder it gets, he couldn't have damaged the process, especially since it was already filtered once before and an amount of goop was taken off the coffee filter. Also if you have any comments on the process my dog used to extract the codeine, he would really like to hear them to see if hes doing it right or if theres any tips to improve.

[TheNewLeft]

you did it backwards....you're supposed to start with hot water and then cool the solution

[wedgebuckets]

I'm fairly sure that your solution would be perfectly fine, however you have to mix the powder in Warm water, and than cool the solution down. The reason for this is that apirin/APAP is significantly more soluable in warm water. This means that if you filter the water while it is hot/warm ALOT more apirin will be dissolved and pass right through the filter exactly like the codeine does.

If you cool down the solution however, the extra aspirin that was dissolved because of the hot water will seperate from solution, and you will be able to filter it out.