Water → 2,7-Octadien-1-ol

In the present invention, a conjugated alkadiene and water are reacted under the above-described reaction conditions to produce an alkadienol. In the reaction solution produced by this reaction (which is called "produced solution" hereinafter), there are contained the catalyst, an alkadienol which is the objective reaction product, the by-products such as alkatrienes, dialkadienyl ethers, organic carboxylic acids and esters, solvent, unreacted conjugated alkadiene and water. In case of using 1,3-butadiene as the starting conjugated alkadiene, the produced alkadienols are octadienlos and octa-2,7-diene-1-ol is produced as the principal reaction product, while octa-1,7-diene-3-ol, octatrienes, dioctadienyl ethers, organic carboxylic acids and esters are yielded as by-products. The yield of the by-products depends on the reaction conditions, but it is usually around a few molar percents based on the conjugated alkadiene. After the reaction, alkadienol can be recovered by known means such as distillation separation or extraction separation.