NOVELTY - Producing methanol from synthesis gas comprising hydrogen, carbon oxide and inert components, comprises: (a) conducting the gas through a reactor (6) in which a portion of carbon oxide is catalytically converted to methanol; (b) separating methanol; (c) liberating methanol and separating discharge stream; (d) recycling circulating stream; (e) combining circulating stream with fresh stream of hydrogen and carbon oxide; (f) supplying discharge stream to secondary reactor where portion of hydrogen and carbon oxide is catalytically converted to methanol; and (g) separating methanol.    USE - The method and the device are useful for preparing methanol (claimed).    ADVANTAGE - The simple method: requires low power and small apparatus dimension and thus economical; produces highly pure methanol; and reduces processing of foreign auxiliary materials.    DETAILED DESCRIPTION - Producing methanol from a synthesis gas comprising hydrogen, carbon oxide and high concentration of inert components, comprises: (a) conducting the synthesis gas through at least one synthesis reactor (6) in which a portion of the carbon oxide is catalytically converted to methanol; (b) separating methanol from the obtained synthesis gas comprising inert components and methanol vapor mixture; (c) liberating the methanol from the mixture into a circulation and separating a discharge stream; (d) recycling the circulating stream from at least one synthesis reactor and thus forming a synthesis cycle; (e) combining the circulating stream with a fresh stream containing hydrogen and carbon oxide, before introducing again into the synthesis reactor; (f) supplying the discharge stream into a secondary reactor in which a further portion of hydrogen and carbon oxide is catalytically converted to methanol; and (g) separating methanol from the synthesis gas comprising inert component and methanol vapor mixture. INDEPENDENT CLAIMS are included for:    (1) a device, for preparing methanol as above per se, comprising one or more synthesis reactors in which a portion of the carbon oxide is catalytically converted to methanol, a separator (10) for separating the methanol from the synthesis gas, pipes (12, 14, 16) for recycling a synthesis-circulating stream from at least one synthesis reactor, pipes (13) for discharging a discharge stream, where a pipe is connected to a secondary reactor in which a further portion of hydrogen and carbon oxide is catalytically converted into methanol, and a separator for separating further methanol from the obtained synthesis gas comprising inert components and methanol vapor containing mixture; and    (2) upgrading an existing device for preparing methanol (where the method comprises the steps (a)-(e)) operating from inert-deficient synthesis gas to operating with inert-rich synthesis gas, preferably for carrying the above method, where a second reactor is downstream to the discharge stream and methanol is separated from the product mixture and the device is operated with a ratio of recycled synthesis gas stream to fresh gas stream that is less than that of a device operated with inert-deficient synthesis gas.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of a device for preparing methanol from synthesis gas comprising hydrogen, carbon oxide and inert components (Drawing includes non-English language text).    Synthesis reactor (6)    Heat exchanger (8)    Separator (10)    Pipes for recycling synthesis-circulating stream (12, 14, 16)    Pipes for discharging a discharge stream. (13)