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Catalytic cracking method of hydrocarbon oil

A catalytic cracking, hydrocarbon oil technology, applied in catalytic cracking, cracking, petroleum industry and other directions, can solve the problems of short adjustment time, increased dry gas and coke yield, etc., to reduce the generation of dry gas and coke, reduce excessive cracking , the effect of reducing the contact temperature

Active Publication Date: 2013-07-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has a high degree of operational flexibility and product flexibility. Different production schemes can be selected according to market demand, and the product structure can be flexibly adjusted. The adjustment time is short, but the yield of dry gas and coke has increased.

Method used

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  • Catalytic cracking method of hydrocarbon oil
  • Catalytic cracking method of hydrocarbon oil
  • Catalytic cracking method of hydrocarbon oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment adopts a medium-sized riser reactor, which is a cylindrical structure with a total height of 10 meters and a diameter of 25 centimeters. The height ratio of the lower and upper reaction zones is 1.8:7.5. is the pre-lift segment.

[0041] The raw material oil processed by the device is, the gasoline raw material introduced from the lower reaction zone is catalytic cracking gasoline; the heavy raw material introduced from the upper reaction zone is wax oil (vacuum gas oil). The feed amount of catalytically cracked gasoline is 15% by weight of the wax oil. The properties of various feedstock oils are listed in Table 1. The brand name of the catalyst is LV-23, which is produced by Qilu Catalyst Factory of China Petrochemical Corporation. The catalyst LV-23 is a cracking catalyst containing Y-type zeolite and ultra-stable Y-type zeolite.

[0042] Concrete steps are, as shown in the accompanying drawing, the gasoline raw material after the preheating enters t...

Embodiment 2

[0046] The method of Example 1 was repeated, except that the catalyst entering the lower reaction zone was the semi-regenerated catalyst from the first stage regenerator in the two-stage regenerator.

[0047] The specific operating conditions, product distribution and gasoline product properties are listed in Table 2, Table 3, and Table 4, respectively.

Embodiment 3

[0053] Repeat the steps of Example 1, except that the catalyst entering the upper reaction zone is the cooled regenerated catalyst from the external heat extractor of the second stage regenerator in the two-stage regenerator.

[0054] The specific operating conditions, product distribution and gasoline product properties are listed in Table 5, Table 6, and Table 7, respectively.

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Abstract

The invention relates to a catalytic cracking method of hydrocarbon oil. The processes are carried out in a riser tube or a fluidized bed reactor at least comprising upper and lower reaction zones. The method comprises the following steps: leading raw gasoline and a spent catalyst and / or a semi-regenerated catalyst in the lower reaction zone to carry out contact reaction; and leading heavy raw materials and a regenerated catalyst in the upper reaction zone to carry out contact reaction with the oil and gas and the catalyst from the lower reaction zone. The method can increase the yield of theliquid and simultaneously improve the quality of the gasoline.

Description

technical field [0001] The invention relates to a method for catalytic cracking of hydrocarbon oil. Background technique [0002] Catalytic cracking is one of the important means of petroleum secondary processing, which is used to produce gasoline, diesel, liquefied petroleum gas, etc. from heavy crude oil. Modern catalytic cracking processes use molecular sieve catalysts and the reaction / regeneration process is continuous. The raw oil is atomized with water vapor and sprayed into the riser reactor, where it contacts with the high-temperature catalyst (550-700°C) from the regenerator, and then undergoes catalytic cracking reaction. The residence time of the oil and gas generated by the catalytic cracking reaction in the riser reactor is very short, generally only a few seconds. The reaction product leaving the riser reactor is separated from entrained catalyst in a settler, and then goes to a fractionation column for product separation. The coke-laden catalyst falls into ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/20C10G11/18C10G11/14
Inventor 侯典国张久顺毛安国
Owner CHINA PETROLEUM & CHEM CORP
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