| http://www.w3.org/ns/prov#value | - ethers and hydrocarbons. Preferably the solvent is a hydrocarbon, advantageously an aliphatic or cycloaliphatic hydrocarbon solvent having from 5 to 10 carbon atoms. Suitable solvents are pentane, hexane, heptane, Isopar E, isooctane, cyclohexane, and
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