Ultrasonic method for desulfurizing ethylene cracking C9

Abstract

The invention relates to an ultrasonic method for desulfurizing ethylene cracking C9, wherein the method comprises the following steps: an adsorption process: starting an adsorption bed ultrasonic device, and carrying out adsorption desulfurization on C9 through an adsorption bed; an oxidation extraction process: starting a primary extraction tower ultrasonic device, adding ionic liquid / hydrogen peroxide into a primary extraction tower, and carrying out oxidation extraction desulfurization; and an extraction strengthening process: starting an ultrasonic device of a secondary extraction tower, adding a multi-component compound extraction agent into the secondary extraction tower, and carrying out extraction desulfurization. The ultrasonic technology is introduced into C9 desulfurization, the chemical reaction speed and the extraction depth are increased, in addition, the three-stage desulfurization process of adsorption, oxidation extraction and re-extraction is adopted, the desulfurization efficiency and selectivity are high, and the extraction performance is effectively enhanced.

Description

Technical field [0001] The present invention relates to the technical field of petroleum industry, in particular, it relates to an ultrasonic method for desulfurizing an ethylene cracking C9 used. Background technique [0002] Ethylene is a basic raw material in the petrochemical industry, ethylene products have become the measure of a country's level of development of petrochemical flag, our country is second only to America's second largest ethylene producer and consumer in the world. The vast majority of domestic manufacturers of multi-ethylene naphtha, light diesel oil and gas oil as raw materials, byproduct ethylene cracking C9 fraction represents 10% -20% ethylene production, the majority of manufacturers as cracking C9 inexpensive primary feedstock sales, after only a few will be processed as gasoline, diesel oil or solvent component, as well as the production of petroleum resins, dicyclopentadiene purified aromatic hydrocarbon solvents and hydrogenation of oils, but its u...

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Problems solved by technology

Inorganic sulfur is extremely corrosive and can corrode equipment; while most organic sulfur has an unpleasant odor and is easy to decompose at high temperature to produce hydrogen sulfide, which in turn corrodes equipment and pollutes the environment

The existence of sulfide also affects the stability of carbon nine and the stability of production and processing. The sulfide in carbon nine is easy to polymerize to form colloid during production, and also has the effect of catalyzing the formation of colloid. In severe cases, it can damage the normal operation of equipment. running, the sulfide produced by its decomposition will further corrode the equipment and affect the life of the device

[0004] At present, hydrodesulfurization is the main method. Hydrodesulfurization requires the organic sulfur in the oil to react with hydrogen to generate hydrogen sulfide in the presence of high temperature, high pressure and catalyst to achieve the purpose of desulfurization. This technology has many disadvantages: It is highly demanding, consumes a lot of hydrogen, and has high operating costs. During desulfurization, the unsaturated bonds (olefins) in the oil are also saturated, which affects the performance of the oil.

In addition, at present, there are few researches on desulfurization methods for C9, and most of them focus on the desulfurization of oil products. However, the composition of C9 is different from that of oil products, and the desulfurization methods suitable for oil products may not be suitable for C9 desulfurization. Therefore, The development of a desulfurization process for ethylene cracking carbon nine has become an urgent problem to be solved in this industry

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