Synthesis method and synthesis system of 1, 4-butanediol

The invention discloses a synthesis method and a synthesis system of 1, 4-butanediol. The synthesis method of 1, 4-butanediol comprises the following steps: a) ethylene glycol steam and an oxygen-containing mixed gas flow are in contact with a first catalyst for an oxidation reaction, and glyoxal is obtained through separation and purification; b) carrying out condensation reaction on the glyoxal obtained in the step a) and acetaldehyde under the action of a second catalyst aqueous solution, and separating and purifying to obtain butenedialdehyde; and c) carrying out hydrogenation reaction on the butenedialdehyde obtained in the step b) and hydrogen under the action of a hydrogenation catalyst, and separating and refining to obtain the 1, 4-butanediol. The method provided by the invention has the advantages of stable raw material source, small investment, large operation flexibility and the like, can effectively simplify the traditional route and reduce the investment, utilizes the raw material advantages of