NOVELTY - Producing hydrogen stream, hydrogen rich synthesis gas stream, hydrogen depleted synthesis gas stream and carbon monoxide stream from single synthesis gas stream X, comprises: optimizing and separating stream X; subjecting stream X1 to water gas shift reaction step; separating and recovering carbon dioxide and hydrogen; utilizing hydrogen fraction and combining with synthesis gas stream X2; utilizing synthesis gas stream X3 as hydrogen depleted synthesis gas stream; treating synthesis gas stream X4; and utilizing resulting carbon monoxide stream as carbon monoxide source of stream.    USE - The process is useful for simultaneous production of: a hydrogen stream A to produce ammonia; hydrogen rich synthesis gas stream B to produce methanol; hydrogen depleted synthesis gas stream C to produce hydrocarbon mixture; and optionally carbon monoxide stream D to produce acetic acid (all claimed). The process is also useful for production of hydrocarbons e.g. naphtha and diesel.    DETAILED DESCRIPTION - Simultaneous production of a hydrogen stream A, hydrogen rich synthesis gas stream B, hydrogen depleted synthesis gas stream C and optionally carbon monoxide stream D from a single synthesis gas stream X, comprises: optimizing the single synthesis gas stream X having a synthesis gas molar ratio calculated as hydrogen/carbon monoxide for the production of product C; separating the single synthesis gas stream X into a synthesis gas stream X1, synthesis gas stream X2, synthesis gas stream X3 and optionally synthesis gas stream X4; subjecting the synthesis gas stream X1 to a water gas shift reaction step to convert the carbon monoxide from the synthesis gas stream X1 and water into carbon dioxide and hydrogen; separating and recovering the carbon dioxide and hydrogen, respectively; utilizing a fraction of the hydrogen as the hydrogen stream A; combining the fraction of the hydrogen with synthesis gas stream X2 which is then used as the hydrogen rich synthesis gas stream B; utilizing the synthesis gas stream X3 as the hydrogen depleted synthesis gas stream C; optionally treating the synthesis gas stream X4 to remove the carbon dioxide and hydrogen; and utilizing the resulting carbon monoxide stream as a carbon monoxide source of stream D.    DESCRIPTION OF DRAWING(S) - The figure shows the schematic diagram of the process for simultaneous production of hydrogen gas streams.