Depressant is one of the principles of industrial raw materials in the production process, often used in the following edited by the company to tell you about its mechanism of action:
Waxy Crude loss of mobility due to precipitation of wax crystals at low temperatures, which was mostly wax crystal plate or needle, combined with each other to form a three-dimensional mesh structure and the low pour point oil, sludge, colloid and bitumen other substance adsorbed around or wax surrounding a paste is formed in a mesh material, leaving the crude loses fluidity. The role of crude oil pour point depressant effects of developmental processes that wax crystal mesh structure, so that the freezing point of the crude oil (pour point) lower. It must be noted, did not inhibit wax crystal precipitation depressant, and can only change the wax crystal morphology. After joining depressant that is, the cloud point of crude oil will not change, just the wax crystals form into a loose wax crystal structure (Slack Wax), after a certain amount of shear force is applied, the mesh structure is easy to destroy, or does not form a mesh structure, thereby increasing the mobility of crude oil, crude oil to reduce the pour point of the effect.
In recent decades, many scholars at home and abroad on the mechanism of action Depressant been studied, the role of the currently accepted principles of crude oil pour point is crystal adsorption theory and common. Crude depressant wax crystal growth process of change can be divided into three types:
(1) nucleation effect:
Crude oil above the cloud point depressant in crystallization temperature, it plays the role of nucleation and growth of wax crystals become the center of crude oil in the small wax crystals increased, so difficult to form a large wax crystals.
(2) adsorption:
Crude oil pour point depressant in the cloud point temperature slightly lower than the precipitation, it has been adsorbed on the core Gin wax precipitated active center, thereby changing the orientation of the wax crystals, making it difficult to form a three dimensional network structure and weaken the adhesion between the wax crystals.
(3) eutectic effects:
Crude oil cloud point depressant in common with the wax crystallization temperature, thereby undermining wax crystal orientation and crystallization behavior and continue to weaken wax crystal growth trend.
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