Method of manufacturing crystalline and amorphous forms of 6,6′-diphenyl-2,2′-bis(2-hydroxyethoxy)-1,1′-binaphthyl and thermoplastic resin therefrom

A method of manufacturing a crystalline form C of 6,6′-diphenyl-2,2′-bis(2-hydroxyethoxy)-1,1′-binaphthyl, wherein the crystalline form C comprises less than 0.1 mol of organic solvents per 1 mol of 6,6′-diphenyl-2,2′-bis(2-hydroxyethoxy)-1,1′-binaphthyl and which in an X-ray powder diffraction diagram at 22° C. and Cu-Kα radiation displays the following three reflections, quoted as 2θ values:

• 5.1±0.2°, 7.6±0.2° and 21.0±0.2°;
• and at least 3 of the following reflections, quoted as 2θ values:
• 8.2±0.2°, 9.2±0.2°, 10.4±0.2°, 10.8±0.2°, 11.6±0.2°, 12.8±0.2°, 13.4±0.2°, 14.5±0.2°, 15.2±0.2°, 15.6±0.2°, 16.6±0.2°, 17.4±0.2°, 17.9±0.2°, 18.5±0.2°, 19.2±0.2°, 19.9±0.2°, 20.4±0.2°, 21.8±0.2°, 22.2±0.2°, 22.6±0.2°, 13.4±0.2°, 24.0±0.2°, 25.7±0.2°, 27.3±0.2° and 27.9±0.2°;
• and
• wherein the method comprises determining the contents of the solvent in the crystalline solvate form by gas chromatography, and
• obtaining the X-ray powder diffraction diagram of the crystalline solvate form at 22° C. using Cu-Kα radiation.