Performance and Selection of Pour Point Depressants

When temperature of paraffinic mineral oil base stocks is decreased belowcloud point,waxy hydrocarbonscome out of solution and growinto plates and needles wax crystalsforming a three-di mensional networkthat totallyi m-mobilizes the oil.Addition of a properlyselected PPD will provide a verylarge enhancement of low-temperature perfor-mance of the oil at verylowconcentrations.Howtoselect a right PPDfor your formulations are discussedinthis paper.

When temperature of paraffinic mineral oil base stocks is decreased below cloud point, waxy hydrocarbons come out of solution and grow into plates and needles wax crystals forming a three- dimensional network that totally immobilizes the oil. Addition of a properly selected PPD will provide a very large enhancement of low - temperature perforrnance of the oil at very low concentrations. How to select a right PPD for your formulations are discussed in this paper.