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official extraction help thread

Migrated topic.
Okay this is my first time posting on here hope I did this correctly!

Once you basify your solution do you then cool down before adding hot naphtha, or does it matter, cooling solution and/or heating naphtha?
The specific heat capacity of water is much higher than that of naphtha, so adding warm naphtha to the cooled base solution would be largely pointless. Aim to do your pulls at between 40 to 60°C perhaps depending on your naphtha. It's not so big of a deal though - good results have also been reported when performing the pulls at room temperature, and higher temperatures tend to give rise to a darker coloured product.
 
For an A/B extraction of MHRB, if my heptane pulls are clear, rather than yellow, does that indicate something has gone amiss?
Not necessarily - you may well have succeeded in getting a really clean pull. Put the first pull in the freezer quick and carry on with the next ones, pronto! :D
 
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