NOVELTY - A syngas (1) mixture containing hydrogen and carbon monoxide is reacted in heterogeneous alcohol pre-converter, in which methanol concentration with respect to or close to equilibrium concentration, is produced. The effluent (2) from the pre-converter is mixed with unconverted recycle syngas and reacted in a heterogeneous reactor for higher alcohols synthesis using a higher alcohols synthesis catalyst.    USE - Production of higher alcohols used as substitute of hydrocarbon fuel and additive of hydrocarbon fuel.    ADVANTAGE - The method effectively produces higher alcohols.    DETAILED DESCRIPTION - A syngas mixture containing hydrogen and carbon monoxide is reacted in heterogeneous alcohol pre-converter, in which methanol concentration with respect to or close to equilibrium concentration, is produced. The effluent from the pre-converter is mixed with unconverted recycle syngas and reacted in a heterogeneous reactor for higher alcohols synthesis using a higher alcohols synthesis catalyst. The effluent from the reactor for higher alcohols synthesis is separated into unconverted syngas, which is recycled to the higher alcohols synthesis reactor, methanol and light alcohols (4), which are recycled to the higher alcohols synthesis reactor, and final product consisting of higher alcohols is obtained. An INDEPENDENT CLAIM is included for apparatus for production of higher alcohols, which consists of pre-converter (A) for pre-converting syngas to methanol, higher alcohols reactor (B) for further reaction of effluent with wet recycle gas and light alcohols and separation unit (C) to separate unconverted reactants in the effluent (3) into recycle gas streams (4, 5), purge streams (7) and product stream (6).    DESCRIPTION OF DRAWING(S) - The drawing shows the flowchart of higher alcohol production process.    Syngas (1)    Effluent product (2)    Light alcohols (4)    Wet recycle gas (5)    Heavy alcohol (6)    Purge stream (7)    Pre-converter (A)    Higher alcohol reactor (B)    Separation unit (C)