prov:value
| - Most preferably, the solvent (A) is chosen to have both a boiling point higher than 100??? C. and a freezing point lower than 0??? C. As non-limitative examples of such solvents, one may use propylene carbonate, gamma-butyrolactone, acetonitrile, benzonitrile, ethylene glycol, oligomers and polymers of ethylene glycol, and the corresponding aliphatic ethers and esters, glycerol, tributyl phosphate
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