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Ethylene Glycol is a clear, sweet, slightly viscous liquid that boils at 198°C. Its most common use is as an automotive antifreeze and it serve as an excellent coolant in automotive radiators. It has a freezing point of 9 °F (−12.9 °C) and a boiling point of 387 °F (197.3 °C), which makes it an excellent antifreeze. Ethylene glycol is also used as an ingredient in hydraulic fluids, printing inks, and paint solvents.

The principal behind cleaning of CARGO hold...
 

The 1st segment to clean and neutralize coal residue :

Coal contains sulfur and many more others materials which is resulting corrosive effect on metal and painted surface. In chemical terms, its proper cleaning means not the only removal of its deposit to make surface clear and bright, But chemically neutralization effect also required. Coal remover having chemical neutralization and  cleaning formula, This product can be mixed with Alkleen safety liquid in open drums / Tanks as follows:::

The effective removal of oils and grease is dependent on the characteristics of the oil in terms of its suspension state and droplet size, which will, in turn, affect the choice of separator technology. Oil in industrial wastewater may be free light oil , heavy oil, which tends to sink, and emulsified oil often referred to as soluble oil. Emulsified or soluble oils will typically require "cracking" to free the oil from its emulsion. In most cases, this is achieved by lowering the pH of the water matrix.