Tricyclodecane dimethanol composition and preparation method of the same

A method of preparing a tricyclodecane dimethanol composition comprising

• tricyclodecane dimethanol, and
• an ether compound represented by the following Chemical Formula 1 in an amount of 1% by weight or less,
• the method comprising the following steps of ii), iii), iv), and vi), and further comprising one or more of the following steps of i) and v):
• i) purifying dicyclopentadiene by performing the retro Diels-Alder reaction and the Diels-Alder reaction of dicyclopentadiene;
• ii) performing a hydroformylation reaction by introducing a catalyst composition including a rhodium-containing catalyst compound and an organophosphorus compound into a reactor, and by adding dropwise dicyclopentadiene under a mixed gas of hydrogen and carbon monoxide;
• iii) performing a hydrogenation reaction of the reaction mixture obtained after the step ii) in the presence of a hydrogenation catalyst;
• iv) removing the hydrogenation catalyst and the solvent from the reaction mixture obtained after the step iii);
• v) performing thin film evaporation of the reaction mixture obtained after the step iv);
• and
• vi) performing vacuum fractional distillation of the reaction mixture obtained after the step iv) or the step v):
• R—CH2—O—CH2—R [Formula 1]
• in Formula 1,
• R's are each independently