In the Kilomentor blog article titled Inorganic Non-Stoichiometric Metal Salt Complexes as a Useful Method for Purifying Neutral Organic Compounds solid complexes were obtained by mixing a 15% by weight solution of calcium bromide dihydrate in amyl methyl ketone and a solution containing an organic mixture that contained steroidal ketones also in amyl methyl ketone. These solid complexes could be decomposed to yield these steroids in a highly concentrated isolate.
These are from the experimental examples of the patent, not from the claims. This is important because claims are based on extrapolations which are often overly optimistic. What these examples are promising is that any large organic molecule containing functionality, even different from alcohol (here ketone), might be precipitated as an insoluble complex from a solution in a low molecular weight ketone using a solution of calcium bromide dihydrate!
The question this begs is what range of larger neutral organic molecules can be isolated/concentrated using such reagents? Finding simple, inexpensive, rugged means to isolate neutral intermediates in chemical reaction sequences would be publication worthy, while the chemical skill to execute the experimentation would not be demanding.
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