Process method and system for combining hydrogenation and catalytic cracking

A technology for catalytic cracking and catalytic cracking of gasoline, applied in the field of hydrocarbon oil processing, can solve problems such as excessive gasoline cracking, loss of gasoline yield, and excessive gasoline condensation and coking, and achieve the effects of high efficiency conversion and high light oil yield

Active Publication Date: 2019-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] CN1388219A reduces the content of gasoline olefins by using the hydrogen donor components with a distillation range less than 400°C to react with gasoline, but when it is necessary to reduce the gasoline olefins and at the same time lighten the hydrogen donor, it cannot be balanced
However, since gasoline enters one of the risers separately to reduce olefins, there is a regenerated catalytic cracking catalyst with stro

Method used

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  • Process method and system for combining hydrogenation and catalytic cracking
  • Process method and system for combining hydrogenation and catalytic cracking

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specific Embodiment approach 1

[0054] Preferred embodiment 1: Combine all of the catalytically cracked heavy cycle oil from step (1) with all of the catalytically cracked light cycle oil from step (3) and all of the catalytically cracked heavy cycle oil from step (3) The cycle oil is introduced into the hydrogenation unit in step (2) for hydrogenation reaction.

specific Embodiment approach 2

[0055] Preferred embodiment 2: all the catalytic cracking heavy cycle oil from step (1), all the catalytic cracking light cycle oil from step (1), and all the catalytic cracking light cycle oil from step (3) The cycle oil and all the catalytically cracked heavy cycle oil from step (3) are introduced into the hydrogenation unit of step (2) for hydrogenation reaction.

[0056] In the aforementioned preferred embodiment 1, the catalytically cracked light cycle oil from step (1) and the low-olefin catalytically cracked gasoline from step (3) are taken out of the unit as diesel products and gasoline products, respectively.

[0057] Preferably, the present invention can also introduce all the catalytically cracked light cycle oil from step (1) into a hydrogenation unit for hydrogenation reaction, and use the low-olefin catalytically cracked gasoline from step (3) as gasoline The product comes out of the device.

[0058] Preferably, the catalytic cracking oil slurry obtained in step...

Embodiment 1

[0112] The residual hydrogenated tail oil A is used as the raw material, and its properties are shown in Table 1. use figure 1 The process flow shown is carried out.

[0113] Residue hydrogenation tail oil A enters the first riser of the double riser medium-sized catalytic cracking test device, and contacts with water vapor and the catalyst from the regenerator to perform the first catalytic cracking reaction. The conditions of the first catalytic cracking reaction are: reaction temperature The temperature is 480°C, the agent-to-oil weight ratio is 6, and the residence time in the first riser is 1.5 seconds. After the reaction, oil and gas are separated to separate dry gas, liquefied gas, first riser catalytic cracking gasoline, first riser catalytic cracking light cycle oil, first riser catalytic cracking heavy cycle oil and first riser catalytic cracking oil pulp. The first riser catalytic cracking light cycle oil is all used as diesel products. All the first riser catal...

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Abstract

The invention relates to the field of heavy oil processing, and discloses a process method and system for combining hydrogenation and catalytic cracking. The method comprises the following steps: (1)catalytic cracking raw oil is introduced into a catalytic cracking first lifting pipe to carry out a first catalytic cracking reaction, and a product of the catalytic cracking reaction is separated; (2) catalytic cracking heavy cycle oil and at least a part of optional catalytic cracking light cycle oil are added into a hydrogenation unit for carrying out a hydrogenation reaction, and a product ofthe hydrogenation reaction is separated to obtain hydrogenation cycle oil; and (3) a part of the hydrogenation cycle oil is introduced into the lower part of a catalytic cracking second lifting pipefor carrying out a catalytic cracking reaction; and a gasoline fraction and the other part of the hydrogenation cycle oil are introduced into the upper part of the catalytic cracking second lifting pipe and are subjected to a catalytic cracking reaction together with a catalyst and oil gas from the lower part of the second lifting pipe. Through the method provided by the invention, the heavy oil can be efficiently converted, low-olefin catalytic gasoline and catalytic diesel oil with a relatively high cetane number can be produced, the proportion of the diesel oil to the gasoline can be flexibly adjusted, and high yield of light oil can be achieved.

Description

technical field [0001] The invention relates to the field of hydrocarbon oil processing, in particular to a hydrogenation and catalytic cracking combined process method and a hydrogenation and catalytic cracking combined process system. Background technique [0002] At present, the world is facing the trend of crude oil becoming heavier and worse, while people's demand for heavy fuel oil is gradually decreasing, while the demand for light oil is greatly increasing. Therefore, refiners are pursuing the maximum conversion of residual oil. [0003] Among the various methods of lightening residual oil, high-quality paraffin-based heavy oil can be directly subjected to catalytic cracking to produce light oil products. Inferior high-sulfur and high-residual carbon residue oil is first subjected to hydrotreating, and the hydrogenated tail oil is then processed by catalytic cracking. The residue oil is hydrotreated to remove impurities such as metals, sulfur, nitrogen, etc., and t...

Claims

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Application Information

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IPC IPC(8): C10G69/04
Inventor 牛传峰张执刚戴立顺崔琰杨清河刘涛邵志才邓中活施瑢聂鑫鹏
Owner CHINA PETROLEUM & CHEM CORP
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