■ Product Overview

This inhibitor is specially developed for ethylene cracking units, with the core function of efficiently inhibiting polymerization reactions and preventing the formation of polymer "fouling". The ethylene cracking unit is a key link in ethylene production, which produces cracking gas by high-temperature cracking of hydrocarbon raw materials. However, the unstable components such as butadiene, pentadiene, cyclopentadiene, and styrene contained in the cracking gas are prone to polymerization of diene in the high-temperature environment of the reboiler and tower kettle, forming high molecular weight polymer "fouling". These "dirt" will adhere to the outer wall of the reboiler tube bundle, tray, and tower wall, deposit in the equipment and pipelines, causing a decrease in tower separation efficiency, pipeline blockage, deterioration of heat transfer efficiency of the heat exchanger and tower, increasing energy consumption of the ethylene plant, shortening the operating cycle of the plant, reducing processing capacity, and even causing unplanned shutdowns of the ethylene plant, seriously affecting the process stability and equipment integrity of the plant. This inhibitor, with its unique formula, can effectively block polymerization reactions, reduce polymer "fouling" from the root, and ensure long-term stable and efficient operation of ethylene cracking units.

■ Productcharacteristic

Efficient polymerization inhibition: Rich in efficient free radical capture components, it can quickly combine with the free radicals generated by high temperature in the cracking gas to terminate the chain polymerization reaction. For example, at the outlet of a tubular cracking furnace, a large amount of free radicals are generated in the cracking gas, and the inhibitor can timely capture the free radicals, prevent the polymerization of monomers such as butadiene and pentadiene, and effectively inhibit the formation of polymer "fouling".

Metal passivation: Can passivate trace metal impurities (such as iron and copper ions) that promote polymerization reactions in the device, reducing their catalytic activity. In the presence of trace metal impurities in the reboiler and tower kettle environment, the inhibitor forms stable complexes with metal ions, blocking their catalytic effect on polymerization reactions and reducing polymerization reactions caused by impurity catalysis.

Dispersed cleaning: Has good dispersibility, can disperse a small amount of generated polymer "dirt" into tiny particles, suspend them in the system, and avoid aggregation and deposition on the surface of the equipment. At the same time, it can slowly dissolve and peel off the existing sediment on the surface of the equipment, continuously maintain the cleanliness of the internal surface of the equipment, maintain smooth material flow inside the device, and ensure efficient operation of the equipment.

High temperature stability: Specially designed for high-temperature conditions of ethylene cracking units, it can maintain good activity and stability in high-temperature environments, without decomposition or volatilization, and continuously exert its anti polymerization effect.

Strong compatibility: Good compatibility with cracking gas, quench oil, quench water, and various additives in the ethylene cracking unit, will not affect the subsequent separation and refining of cracking gas, nor will it cause other side reactions or equipment failures.

■ Scope of application

Suitable for various ethylene cracking units, whether using naphtha, light hydrocarbons as raw materials, or cracking units using different raw material routes such as coal to gas, this inhibitor can be used to control the generation of polymer "fouling" and improve the operating efficiency and product quality of the unit.