Catalytic cracking additive and application method thereof

Abstract

The invention relates to a catalytic cracking additive and an application method thereof. The catalytic cracking additive comprises the following components in weight percent accounting for the total weight of the catalytic cracking additive: 5-50% of fatty alcohol-polyoxyethylene ether, 5-50% of alkylphenol polyoxyethylene ether, 5-30% of amide compound, 2-15% of alcohol amine compound and deionized water. The application method of the catalytic cracking additive comprises the steps of feeding 30-150 microgram / g catalytic cracking additive in the total weight of catalytic cracking raw oil into a mixing chamber with a feeding nozzle along with atomized steam, mixing the catalytic cracking additive with the raw oil and spraying mixture by virtue of the feeding nozzle. According to the catalytic cracking additive, yields of liquefied gas and light oil can be increased and yield of coke is reduced.

Description

technical field [0001] The invention relates to the field of catalytic cracking of hydrocarbon oil in the absence of hydrogen, in particular to an additive for hydrocarbon catalytic cracking feedstock oil and its application method. Background technique [0002] With the dwindling of petroleum resources, the proportion of heavy crude oil processing is gradually increasing. As the main processing technology in the field of oil refining, fluidized catalytic cracking is also facing the processing of heavy raw materials with high boiling point, high density and high viscosity. It is a common phenomenon in every refinery to mix refining residue or full refining residue. For the fluid catalytic cracking process, the most prominent problem is that it is difficult for the heavy feed to be completely atomized into tiny oil droplets. Good vaporization of the feed is the key to obtaining a good distribution of catalytic cracking products, and the particle size of the oil droplets dire...

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Problems solved by technology

There may be disadvantages in the use of additives. Usually, a small amount of enhancer is added to the raw oil pipeline. Due to insufficient mixing, the dispersion effect is not ideal, and satisfactory use results cannot be obtained.

There are also many problems in the use of emulsified feed for catalytic cracking. First, the raw oil must first be mixed and emulsified with oil and water before entering the nozzle of the riser reactor. It is often stirred and mixed at low temperature and high speed to form emulsification. Raw materials; secondly, when the emulsified mixture flows in the feed pipeline of the device, it is inevitable that water droplets will gather to form water droplets of different sizes and uneven dispersion, which will be vaporized instantly when entering the riser reactor, and the volume will expand sharply by a thousand times. It may cause system pressure fluctuations or affect the fluidization state of the catalyst, making the operation of the device unstable

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