Sk Innovation Co., Ltd.

Sk Global Chemical Co., Ltd.

Sk Energy Co., Ltd.

Sk Incheon Petrochem Co., Ltd.

Joong Min Park

Jae Yeon Park

Dong Hyun Kim

Yeon Hwa La

Min Su Koo

Young Bin Seo

Sang Min Lee

Hee Jung Jeon

Jae Wook Ryu

Sang Il Lee

Gyung Rok Kim

Do Woan Kim

Woo Chan Park

Chang Kuk Kim

Seung Yeop Lee

Sin Young Kang

Laura Ruohonen

Marja Ilmen

Outi Koivistoinen

Sung Ho Lee

Jae Yang Song

Il Yong Jeong

Joon Sik Lee

Cher Hee Park

Merja Oja

Paula Jouhten

Andrew Conley

Eun Hee Park

Young Hwan Chu

Hong Seung Yeon

Sang Jun Ju

Sung Wook Jun

Provided are a layer-separation method of a spent caustic solution, and a recycling method of an additive, and more particularly, a layer-separation method of a spent caustic solution including: injecting an additive and an acidic compound to the spent caustic solution occurring from a refinery process to break down a red oil emulsion and to perform layer-separation into an upper layer fraction and a lower layer fraction, wherein the additive is an aliphatic hydrocarbon compound having a water solubility of 0.1 to 10 g/L at 20&#xb0; C.

Layer-separation method of spent caustic solution

Provided are a recombinant yeast producing 3-hydroxypropionic acid (3-HP) and a method for producing 3-HP using the same, more particularly, a recombinant yeast producing 3-HP, comprising an exogenous AADH gene; an endogenous or exogenous ACC gene; an exogenous MCR gene; and an exogenous HPDH gene, and producing 3-HP through [Pyruvate Acetaldehyde&#x2192;Acetyl-CoA Malonyl-CoA Malonate semialdehyde 3-HP] biosynthesis pathway, and a method for producing 3-HP using the same.

Recombinant yeast producing 3-hydroxypropionic acid and method for producing 3-hydroxypropionic acid using the same

The present invention provides a fed-batch culture method comprising a step of fed-batch-feeding a carbon source base and a base in such a manner that the pH level can be maintained at a level suitable for the growth of microorganisms for fermentation of a carbon source. The present invention also provides a method for preparing organic acids using the fed-batch culture method. The present invention fed-batch-feeds a neutralizing agent such as ammonium bicarbonate, ammonium carbonate or alkali metal-containing weak base, and a carbon source substrate in preparing organic acids by microorganism fermentation. Thus, a pH level suitable for the survival of microorganisms for carbon source fermentation can be maintained, and the speed of injecting the carbon source base which is the source material can be appropriately adjusted. The present invention may improve productivity, yield rate and concentration of organic acids and may automatically inject a base and a carbon source substrate according to a variation in the pH level, thus improving reliability and convenience of a fermentation process operation.

Method for preparing organic acid by fed-batch-feeding carbon source substrate and base

Provided are an oleaginous microorganism disruption process using a supersonic disperser and a method for producing bio-oil using the same. The method for producing bio-oil according to the present invention induces a cell disruption of oleaginous microorganisms without a separate drying process, thereby providing a method for continuously producing bio-oil in an economical and simple manner. In addition, the method of the present invention induces a cell disruption of oleaginous microorganisms without a heating process, thereby producing bio-oil without a change in physical properties due to the heat.

Oleaginous microorganism disruption process using supersonic disperser and method for producing bio-oil using same

Provided herein are microalgae of a Thraustochytrid and a method for preparing bio-oil using the same, and more particularly,sp. LA3 (KCTC12685BP) having bio-oil producibility, and a method of preparing bio-oil, particularly bio-oil having a content of omega-3 unsaturated fatty acids of 30% by weight or more based on total fatty acids, characterized by culturing the microalgae. The microalgaesp. LA3 (KCTC12685BP) described herein has a rapid sugar consumption rate when being cultured using glucose as a carbon source, has a high oil content, allows cells to be cultured at a high concentration, and allows oil to be obtained in high productivity and a high yield, and thus, may produce bio-oil more economically and environmentally friendly.

Microalgae aurantiochytrium sp. LA3 (KCTC12685BP) and method for preparing bio-oil 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

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Seoul, South Korea

Joong Min Park