Sk Innovation Co., Ltd.

Sk Energy Co., Ltd.

Ki Seok Choi

Eun Kyoung Kim

Jin Su Ham

Young Suk Kim

Min Kyoung Kim

Jae Hwan Lim

Chang Kuk Kim

Jeong Hwan Yang

Min Hoe Yi

Chang Woo Joo

Dong Wook Park

Myoung Han No

Yun Hee Lee

Gwang Hyoun Kim

Disclosed is a method of removing metals from hydrocarbon oil, comprising: supplying a feed including hydrocarbon oil; mixing the feed with an aqueous solution including a metal scavenger to prepare a first mixture; separating the first mixture into a first aqueous solution phase and a first hydrocarbon phase and discharging the separated first aqueous solution phase; mixing the separated first hydrocarbon phase with washing water to produce a second mixture; separating the second mixture into a second aqueous solution phase and a second hydrocarbon phase; and recovering the separated second hydrocarbon phase and recirculating the separated second aqueous solution phase.

Method for removing metal from hydrocarbon oil

Disclosed herein are a method of preparing a hydrocarbon oil blend having superior storage stability using a novel stability prediction model that is quick, easy and reliable; and a method of predicting the stability of a hydrocarbon blend.

Method for preparing stabilized hydrocarbon oil blend

Provided is an insulation resistance measuring circuit including: a source resistor unit including a first source resistor connected between a positive terminal of a battery and a second source resistor and the second source resistor connected between a negative terminal of the battery and the first source resistor; a voltage sensing unit sensing a voltage of the first source resistor as a first voltage and sensing a voltage of the second source resistor as a second voltage; and an insulation resistance measuring unit measuring an insulation resistance of the battery through a value obtained by dividing a difference between the first and second voltages by a sum between the first and second voltages.

Insulation resistance measuring circuit free from influence of battery voltage

Growing community of inventors

Daegu, South Korea

Ki Seok Choi