Hello. First off, I want to show my appreciation of this site and its members. I feel important things are being done here.
Anyway, I have made extractions that I then freeze-precip/evap'd to obtain crystals that have failed testing. I can only speculate as to why I'm receiving negative results because I have done everything to the "T". I paused to avoid further failure and waste of crystals, after months of researching I have now made another extraction. The extracted naphtha is now sitting in a hot water bath. I am prepared to do a sodium carbonate wash as well as this is something I have never done before. Always before immediately after extraction I went to freeze-precip, to drying, then to testing with negative results. Help is much needed and will be eternally appreciated as it is a strong desire to produce quality product at this time. Thanks in advance!
Anyway, I have made extractions that I then freeze-precip/evap'd to obtain crystals that have failed testing. I can only speculate as to why I'm receiving negative results because I have done everything to the "T". I paused to avoid further failure and waste of crystals, after months of researching I have now made another extraction. The extracted naphtha is now sitting in a hot water bath. I am prepared to do a sodium carbonate wash as well as this is something I have never done before. Always before immediately after extraction I went to freeze-precip, to drying, then to testing with negative results. Help is much needed and will be eternally appreciated as it is a strong desire to produce quality product at this time. Thanks in advance!