The demulsifier, also named deoiler is a product formed by the block polyether of ethylene oxide and propylene oxide. The products are divided into oil-based products and water-based products. Different demulsifiers are choose by jar test according to different oil qualities (such as waxy oil, bituminous oil or light oil) and treatment temperatures. Our company's product has passed the third party reports in order to apply qualifield supplier in Kuwait Oil Company(KOC).