Preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene

Details Preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene Preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene

1992-02-11

1992-09-22

Lone, Werren B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568719, 568720, 568722, 568724, C07C 3720, C07C 3912

Patent

active

051498863

ABSTRACT:
In a process for the preparation of 9,9-bis-(4-hydroxyphenyl)-fluorene by condensing fluorenone and phenol in a molar ratio of 1:4 to 1:8 at 30.degree. to 90.degree. C. in the presence of gaseous hydrogen chloride and .beta.-mercapto-propionic acid catalyst, the improvement comprising distilling water of reaction and dissolved hydrochloric acid from the completed reaction mixture, dissolving the distillation residue in a nitrile, separating the crystallized adduct of nitrile and 9,9-bis-(4-hydroxphenyl)- fluorene from the nitrile and optionally dissociating the adduct to recover high purity 9,9-bis-(4-hydroxphenyl)- fluorene.

REFERENCES:
patent: 4024194 (1977-05-01), Corn, Jr.
patent: 4049721 (1977-09-01), Corn, Jr. et al.
patent: 4675458 (1987-06-01), Riemann et al.

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