A catalytic cracking method for producing high-octane gasoline
A high-octane gasoline and catalytic cracking technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, and treatment with moving solid particles, to achieve the effects of reducing adverse effects, high process flexibility, and simple process flow
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[0054] In one embodiment, the catalytic cracking unit includes a riser reactor and a fluidized bed reactor sleeved on the upper part of the riser reactor, and the fluidized bed reactor includes an upper and lower coaxial and fluidly connected diameter-expanding reactor section and a dilute phase outlet section with reduced diameter, the dilute phase outlet section with reduced diameter is arranged above the reaction section with expanded diameter, the reaction section with expanded diameter is connected with the riser reactor, and the dilute phase dilute phase with reduced diameter The inner diameter of the outlet section is 30-60% of the inner diameter of the diameter-expanding reaction section. Further, the catalytic cracking unit may also include a settler and a stripper that are coaxial and fluidly connected up and down, the riser reactor extends from the stripper into the settler from bottom to top, and the flow The fluidized bed reactor is located in the settler; the top...
Embodiment 1
[0072] According to this embodiment figure 1 The process shown is tested on a medium-sized device of a riser reactor, the atomization medium is catalytic cracking desulfurization dry gas, and the catalyst is HAC. The raw oil is preheated to 350°C, atomized by dry gas, and then injected into the riser reactor, where it contacts with the high-temperature regenerated catalyst (650°C) lifted by water vapor and undergoes catalytic cracking reaction. After the reaction oil gas is discharged from the outlet of the riser reactor, the dilute phase of the settler is separated by the cyclone separator and then enters the subsequent fractionation device. The spent catalyst with carbon enters the stripping section, and the spent catalyst after stripping enters the regenerator to be burnt for regeneration, and the regenerated catalyst returns to the riser reactor for recycling. The operating conditions and test results are shown in Table 4.
[0073] It can be seen from Table 4 that, with ...
Embodiment 2
[0075] The test device and operating conditions used in this example are the same as those in Example 1, except that the atomizing medium is a mixture of dry gas and water vapor, wherein the weight ratio of dry gas to the atomizing medium is 0.5. The operating conditions and test results are shown in Table 4.
[0076] As can be seen from Table 4, adopting the method provided by the invention is beneficial to improving the conversion rate of raw materials and gasoline yield, and the octane number of gasoline is increased, while the olefin content of gasoline is reduced. Compared with Comparative Example 1, by adopting the method provided by the invention, the feed oil conversion rate increased by 1.22 percentage points, and the gasoline yield increased by nearly 1 percentage point; the gasoline olefin content decreased by 2.55 percentage points, and the gasoline aromatics content increased by 3.80 percentage points; gasoline research The octane number is 93.0, an increase of 0....
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Abstract
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