The Korean Group III Giants

The world s two largest group III producers at the time this was written are both located in South Korea, SK Corp (14,000 bpd) at Ulsan and S-Oil, formerly Ssangyong (9,000 bpd), at Onsan.41 Both operate very large refineries (more than 1,000,000 and 525,000 bpd, respectively) and both employ fuels hydrocrackers to generate waxy high VI intermediates which are subsequently fractionated into waxy lube streams, dewaxed, and hydrofinished. 

Effect of Slack Wax Injection on Isoparaffin Product Levels (Low Viscosity Group III Production) 

Source M. Takizawa, T. Takito, M. Noda, K. Inaba, Y. Yoshizumi, and T. Sasaki, Commercial Production of Two Viscosity Grades VHVI Basestocks, paper presented at the 1993 National Fuels and Lubricants meeting of the National Petroleum Refiners Association, Houston, Texas, November 4-5, 1993. With permission. 

Charge Operating Conditions Run Number 100% Ordovician Residue 80% Ordovician Residue + 15% Wax 60% Ordovician Residue + 40% Wax  

Source A. M. Henke and R. E. Peterson, Process for Preparing an Improved Lubricating Oil, U.S. Patent 3,046,218. 

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