This project cost 5,000,000 baht. The hot quench column which made by steel and lining by brick to anti corrosion of acid inside the column was corroded and leak after long service life. To repairing this column, Titanium Gr-7 plate thickness 6 mm was lining inside the column after the brick but the complication of the lining is to separate the titanium lining part to 11 pie ces and drop pass through the top man hole and assembly and welding inside the column.