High-temperature-resistant oil slurry scale inhibitor

Abstract

The invention belongs to the technical field of petrochemical industry, and particularly relates to a high-temperature-resistant oil slurry scale inhibitor. The oil slurry scale inhibitor is mainly used for preventing scaling of an oil slurry system of a device and the bottom of a fractionation tower. The oil slurry scale inhibitor comprises, by mass, 10%-35% of a detergent dispersant, 0.1-5% of an amine type antioxidant, 0.1%-5% of a hydrogen supply type antioxidant, 0.1-2% of a metal passivator and the balance solvent. The oil slurry scale inhibitor has good high temperature resistance and still has good oxidation resistance at 370-420 DEG C. The detergent dispersant does not contain sulfur or phosphorus, and has good scale inhibition and scale removal effects. The freezing point of thehigh-temperature-resistant oil slurry scale inhibitor is low (<=-20 DEG C), and the storage tank of the high-temperature-resistant oil slurry scale inhibitor does not need heat insulation during the winter. When 30-200 ppm of the oil slurry scale inhibitor is added, the problem of pressure drop increasing caused by the coking of the bottom of the fractionation tower and the problem of plugging caused by scaling of an oil slurry heat exchanger, a pipeline and the like can be effectively solved; the oil slurry scale inhibitor guarantees long-term operation of the device and has great economic benefits.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a high temperature resistant oil slurry scale inhibitor Background technique [0002] As the nature of the raw oil in the catalytic unit becomes heavier and the processing conditions become more and more harsh, some FCC units in some refineries have problems such as coking on the bottom tray of the fractionation tower and fouling in the oil slurry system, resulting in frequent cleaning of the heat exchanger. There are a series of problems such as the increase of oil slurry circulation and the decrease of steam production. For this reason, after research at home and abroad, several solutions have been proposed, including improving the properties of raw materials, reducing the severity of processing, and increasing the amount of oil slurry thrown out. Generally speaking, different methods will be selected according to the specific conditions during the processing of the devic...

AI Technical Summary

Problems solved by technology

Generally speaking, different methods will be selected according to the specific conditions during the processing of the device, but generally speaking, these methods are difficult to implement and the cost is high, while the use of oil slurry antiscalant is not only low in cost, but also easy to operate, and has been obtained. wide application

At present, for refineries with harsh processing conditions, oil slurry scale inhibitors of foreign brands are generally used. Started research and developed a high temperature oil slurry antiscalant to be used under harsh processing conditions

[0003] Existing oil slurry scale inhibitors often contain sulfur, phosphorus and metal detergents and dispersants. Oil slurry scale inhibitors are used in catalytic cracking systems, and sulfur, phosphorus and metal detergents and dispersants will increase sulfur in catalytic cracking products during use. Phosphorus and metal content, and affect the life of the catalytic cracking catalyst, the existing oil slurry antiscalant, not high temperature resistant