A process for producing the natural sweetener composition which comprises at least one of steviolbioside (STB) extract, Rebaudioside B extract and Rebaudioside D extract (“collectively, the “extracts”) comprises the steps of preparing a mother liquor comprising a mass content of at least 20% of at least one of the extracts preparing feed liquid comprising at least 20 mg/mL of mother liquor flowing feed liquid through a porous adsorption column, having a pore size of at least 40 Angstroms, a pore volume of a least 0.8 mL/g and at a flow rate of at least 1L/min and at a pH of between 4 to 5 eluting at least one steviolbioside (STB) extract, Rebaudioside B extract and Rebaudioside D extract with alcohol having a mass concentration of at least 65% fractionally collecting one or more eluates based on chromatographic critical points for each of the steviolbioside STB extract, the Rebaudioside B extract and the Rebaudioside D extract concentrating the extracts at a temperature of between 60-80° C. and drying the extracts so formed.
