Sk Innovation Co., Ltd.

Sk Energy Co., Ltd.

Eun Hee Park

Joon Sik Lee

Dong Hyun Kim

Jae Wook Ryu

Jin Su Ham

Jae Yeon Park

Jong Ho Lim

Min Su Koo

Joong Min Park

Woo Chan Park

Seung Yeop Lee

Su Jin Lee

Sin Young Kang

Young Hwan Chu

Dong Seok Jang

Provided is a method of identifying authenticity of oil by reacting oil marked by a Oil Marker Composition with a developer to develop a color and then measuring absorbance. According to the present invention, an oil maker capable of quantitatively and qualitatively measuring authenticity of oil due to a rapid reaction rate, excellent reproducibility, and distinct color development that may be observed by the naked eyes, and a method of identifying oil using the same.

Diamine-based oil marker compositions and method of identifying oil product using the same

Disclosed is a method of preparing alkyl butyrate, which comprises: (a) producing a fermented liquid containing butyrate salt through a fermentation process using butyric acid-producing strains; (b) obtaining an extracted liquid containing butyric acid from a continuous extracting apparatus using an extraction solvent, after converting the butyrate salt into butyric acid by adding an inorganic acid except for carbonic acid or carbon dioxide into the fermented liquid, wherein the continuous extracting apparatus includes a plurality of extraction plates which are installed inside an extraction column and perform a reciprocating motion vertically, and the broth and the extraction solvent are supplied to upper and lower portions of the column, respectively; and (c) reacting the extracted liquid and alcohol having a carbon number of 4 or less or a mixture thereof in an esterification reactor to convert a resultant product into alkyl butyrate. According to the present invention, butyric acid existing in microbic culture fluid can be efficiently extracted, and furthermore, competitively priced alkyl butyrate can be prepared without an additional process of separating the extracted solvent while minimizing energy consumption.

Method of preparing alkyl butyrate from fermented liquid using microorganisms

Growing community of inventors

Daejeon, South Korea

Eun Hee Park