The high-tech product GT-D03A coal tar removerr is independently R&D by our own company. This demulsifier is specifically designed to remove the water from crude，the water in oil(W/O) emulsified crude oil, tertiary oil recovery. Widely used the treatment of crude oil in Oil field and refinery processing, especially for the demulsification, the dehydration, the desalination and the viscosity in the process of heavy oil recovery and transportation and crude oil refining, and paraffin treatment of the crude oil with high wax.