METHOD FOR EXTRACTING BUTYRIC ACID FROM THE BUTYRATE SALT OF MICROORGANISM FERMENTED LIQUID AND CHEMICALLY CONVERTING BUTYRIC ACID INTO BIOFUEL

摘要

The present invention relates to a method for extracting butyric acid by applying pressurized carbon dioxide to the fermented liquid produced from the strain that produces the butyric acid. More particularly, the present invention relates to a method for producing butyric acid by converting the butyrate salt bound with a cation contained in the fermented liquid produced from the strain that produces the butyric acid into a butyric acid which can be easily extracted by a solvent, by using pressurized carbon dioxide, and extracting butyric acid by using an organic solvent. Further, the present invention relates to a method for producing butanol by enabling the butyric acid extracted by the above-described method to react with hydrogen, and to a method for producing butanol by enabling the thus-extracted butyric acid to sequentially react with butanol and hydrogen. The present invention involves converting the butyrate salt contained in the fermented liquid into a butyric acid to significantly improve the efficiency of the solvent-extraction of butyric acid from the fermented liquid. As a result, the present invention produces a butyric acid in a biological manner as well as in an efficient and economically advantageous manner, and thus basically improves the competitiveness in price of bio-butanol which is produced using a biological method and a chemical method in sequence.