Method for producing 1,3-butylene glycol, and 1,3-butylene glycol product

A method for producing 1,3-butylene glycol to yield purified 1,3-butylene glycol from a reaction crude liquid comprising 1,3-butylene glycol, the method comprising:

• performing dehydration including removing water by distillation;
• removing a high boiling point component including removing a high boiling point component by distillation;
• and
• performing product distillation to yield purified 1,3-butylene glycol,
• wherein, in a product column for use in the performing product distillation, a charged liquid including 1,3-butylene glycol is distilled off under a condition that a reflux ratio is 0.4 or greater, a liquid in which a low boiling point component is concentrated is distilled off from above a charging plate, and 1,3-butylene glycol is extracted from below the charging plate,
• wherein a distillation ratio in the product column is set to be less than 25 wt. %, and
• wherein the reaction crude liquid comprising 1,3-butylene glycol is produced by hydrogenation of acetaldols as a raw material for hydrogenation, the raw material containing water, and a water content in the raw material for hydrogenation is 2 wt. % or greater.