Process and apparatus for the parallel preparation of butadiene and synthesis gas

The invention relates to a method (100, 200) for the parallel preparation of butadiene, and of synthesis gas in which an ethanol-containing Butadiensyntheseeinsatzgemisch containing form a butadiene and other unsaturated hydrocarbons, carbon monoxide and hydrogen Butadiensyntheseproduktgemischs a Butadiensynthese (3) is subjected to the from the crystals to leave an at least containing part of the other unsaturated hydrocarbons, carbon monoxide and hydrogen residual mixture, the butadiene is at least partially separated off is used in the formation of a separation Butadiensyntheseproduktgemisch feed mixture. It is contemplated that the residual mixture is subjected to formation of a subsequent mixture to form a subsequent mixture in one or more steps, wherein at least one of the process steps of a Wasserstoffabreicherung, and that the sequence mixture or a polymer formed from the sequence mixture secondary mixture at least partially used in the formation of a synthesis gas feed mixture and a synthesis gas generation (1) is subjected. A corresponding system is also object of the present invention.