Proces to recover 4-phenoxybiphenyl
The invention is a process to recover 4-phenoxybiphenyl from a phenoxybiphenyl mixture which includes at least 30% by weight of 4-phenoxybiphenyl, the balance being 2-phenoxybiphenyl, 3-phenoxybiphenyl and a minor amount of other compounds. The process involves recrystallizing 4-phenoxybiphenyl as a...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The invention is a process to recover 4-phenoxybiphenyl from a phenoxybiphenyl mixture which includes at least 30% by weight of 4-phenoxybiphenyl, the balance being 2-phenoxybiphenyl, 3-phenoxybiphenyl and a minor amount of other compounds. The process involves recrystallizing 4-phenoxybiphenyl as a solid in a single recrystallization step from a solution formed from the mixture and an alcohol solvent. The recovered solid has a 4-phenoxybiphenyl content of at least about 85% by weight of recovered solid and a yield of at least 40% based on the amount of 4-phenoxybiphenyl in the mixture. |
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