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Catalytic cracking method

A catalytic cracking and catalyst technology, which is used in the petroleum industry, processing hydrocarbon oil, etc., can solve the problems of high dry gas yield and low conversion rate of heavy oil, reduce yield, increase the depth of heavy oil conversion, and suppress dry gas and coke. generated effect

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a high yield of dry gas and a low conversion rate of heavy oil

Method used

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  • Catalytic cracking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment illustrates: with raw material B as reaction feed (the present invention is also called fresh feed, the same below), using MMC-2 catalyst in continuous reaction-regeneration operation medium-sized double riser+fluidized bed combined reactor test device (The first riser reactor is introduced into the second regeneration agent to form two reaction zones) The situation of the catalytic conversion test.

[0037] The inner diameter of the first riser of this medium-sized device is 16 mm, and the height is 3800 mm. The opening at 1200 mm from the bottom of the first riser is set up to introduce the second regenerated catalyst route; the inner diameter of the second riser is 16 mm, and the height is 3200 mm. mm. The outlet of the riser is connected to the fluidized bed reactor. The inner diameter of the fluidized bed reactor is 64 mm and the height is 600 mm. Its configuration is as follows figure 1 shown. The test is operated in the way of back refining. Th...

Embodiment 2

[0041] This embodiment illustrates: take raw material B as reaction feed, use MMC-2 catalyst in the medium-sized double riser+fluidized bed combined reactor test device of continuous reaction-regeneration operation (the first riser does not introduce the second strand Regenerant) on the catalytic conversion test.

[0042] The medium-sized device used in this comparative example is basically similar to the device in Example 1, the difference is that the first riser is not set up to introduce the second regenerated catalyst route. The main operating conditions and results of the experiments are listed in Table 3.

Embodiment 3

[0044] This embodiment illustrates: take raw material B as reaction feed, use MMC-2 catalyst in the continuous reaction-regeneration operation medium-sized double riser+fluidized bed combined reactor test device (introduce the second regeneration on the first riser Agents form two reaction zones) in the case of catalytic conversion tests.

[0045] The test device is the same as that in Example 1. Compared with Example 1, in addition to adjusting the operating conditions, the reclamation conversion of the C4 fraction is also increased, that is, the C4 fraction participating in the reclamation from the separation system is introduced into the second riser and the pre-riser to contact with the catalyst. The main operating conditions and results of the experiments are listed in Table 4.

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Abstract

The invention relates to a catalytic cracking method which comprises the following steps: a heavy raw material is in contact with a catalyst containing shape-adaptive zeolite with the average pore size of less than 0.7nm in a first riser reactor with at least two reaction zones to perform cracking reaction; and a light raw material and cracked heavy oil are in contact with the catalyst containing shape-adaptive zeolite with the average pore size of less than 0.7nm in a second riser reactor and a fluidized bed reactor to perform cracking reaction. The method is used for the catalytic cracking of heavy oil; and the conversion rate of heavy oil and the yield of propylene are higher, and the yields of dry gas and coke are low.

Description

technical field [0001] The invention relates to a catalytic cracking method. Background technique [0002] Small molecule olefins such as ethylene, propylene and butene are the most basic raw materials for organic synthesis. At present, the production of small molecular olefins in the world mainly adopts the steam cracking method, but because the high temperature cracking furnace is easy to coke, this method is only suitable for processing light raw material oils, such as natural gas, naphtha and light diesel oil. Due to the relatively heavy crude oil in my country and the low yield of naphtha and other light oils, the contradiction between supply and demand of raw materials for steam cracking and catalytic reforming has become increasingly serious. Since the mid-1980s, Sinopec Research Institute of Petroleum and Chemical Industry has been engaged in the research of catalytic cracking family technology for producing light olefins from heavy oil, and successfully developed t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G55/00
Inventor 谢朝钢高永灿鲁维民龙军崔琰张久顺杨轶男马建国朱根权姜楠
Owner CHINA PETROLEUM & CHEM CORP
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