Production of highly pure meta,meta-coupled bis(4-alkylphenol) derivatives and uses thereof

A process for the production of aromatic dihydroxy compounds of >97 wt % purity, with a general formula according to (I):

• a. wherein X is selected from C1-C24 organic group;
• b. wherein R1 is hydrogen;
• c. wherein R2 is independently selected from hydrogen, methyl or ethyl;
• d. wherein R3 is independently selected from hydrogen, hydroxy, methoxy or ethoxy;
• the process comprising:
• (1) starting from a raw reaction product mixture from a condensation reaction of i) 4-alkylphenol derivatives and/or combinations thereof with ii) carbonylic compounds,
• (2) forming crystals of said aromatic dihydroxy compounds from slow gradual evaporation of the solution of crystallization and
• (3) separating said crystals.

A process for the production of aromatic dihydroxy compounds of >97 wt % purity, with a general formula according to (I):

• a. wherein X is selected from a C1-C24 organic group;
• b. wherein R1 is hydrogen;
• c. wherein R2 is independently selected from hydrogen, methyl or ethyl;
• d. wherein R3 is independently selected from hydrogen, hydroxy, methoxy or ethoxy;
• the process comprising:
• (1) carrying out a condensation reaction of i) 4-alkylphenol derivative and/or combinations thereof with ii) carbonylic compounds to produce a raw reaction product mixture,
• (2) forming crystals of aromatic dihydroxy compounds by gradual evaporation of the solution of raw reaction product and
• (3) separating said crystals.