Demulsifier HYP-36A is a mixture of polyether, polyether ester, alcohol solvent and alkane solvent and belongs to low-medium flash point demulsifier. It provides excellent demulsification effect for produced fluid of crude oil with high wax content and has characteristics of rapid dehydration, clean dehydrated water, high final dehydration rate and tidy oil-water interface. This product is mainly used for dehydration and desalination of crude oil of oilfields andrefineries.