Abstract: RPD-JM, a calcium removal agent developed by Research Institute of Petroleum Processing, has been applied at the crude distillation unit of Jingmen Petrochemical Corporation since 2007, processing high calcium crude oils, such as Nanyang crude oil and Jianghan crude oil. The application results show that using RPD-JM calcium removal agent and demulsifier simultaneously, the average removal rates of calcium and iron reach more than 80% and 27.03%, respectively; the electric current of the desalting tank reduces, providing a 109.4 MWh electricity saving annually; by using calcium removal agent, the FCC catalyst consumption decreases by 4.44%, the activity of E-cat increases 2 units and the vacuum residue blending ratio of FCC unit increases 1.95 percentage points.

Key words: calcium containing crude oil , calcium removal agent, crude distillation, catalytic cracking, electric desalting