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Method and device for preparing ethylene through crude oil catalytic conversion

A technology for catalytic conversion and crude oil, which is used in hydrocarbon cracking to produce hydrocarbons, chemical recovery, organic chemistry, etc. It can solve problems such as affecting the target product, reducing the effect of catalytic cracking, and difficult to activate.

Active Publication Date: 2021-04-02
QINGDAO JINGRUN PETROCHEM DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Crude oil to ethylene requires a higher reaction temperature, generally higher than 650°C; due to the wide range of crude oil components, the reaction process is a process of gradual cracking and molecular weight reduction; the smaller molecules are difficult to activate, the higher the reaction temperature required, High temperature naturally reheats the cracking reaction, which affects the selectivity of the target product; how to allocate the reaction temperature and the molecular characteristics of crude oil, balance the catalytic cracking reaction and thermal cracking reaction, and realize the limit control of the reaction is of great significance; the desired reaction process Yes, increase the proportion of catalytic reaction as much as possible in the cracking stage of heavy oil and other macromolecules, limit thermal cracking, and gradually increase the temperature and increase the proportion of thermal cracking reactions in the lower molecular cracking stage; It is a gradual cooling process, especially for the reaction of ethylene production. Due to the high reaction temperature required, the reaction temperature in the initial stage, that is, the heavy oil cracking stage in the lower part of the reactor, is higher, and the heavy components are directly subjected to thermal cracking reaction, which reduces the catalytic cracking reaction. Effect

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  • Method and device for preparing ethylene through crude oil catalytic conversion
  • Method and device for preparing ethylene through crude oil catalytic conversion
  • Method and device for preparing ethylene through crude oil catalytic conversion

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Effect test

Embodiment approach 1

[0054] The method for producing ethylene by catalytic conversion of crude oil in this embodiment adopts figure 1 In the shown device, a reaction system and a catalyst regeneration system are arranged downstream of the crude oil heating furnace or the heat exchanger A0 and the crude oil separation tower or the flash tower T00; the reaction system includes the first reactor R10 and the second reactor R20, specifically implemented When, the first reactor R10 and the second reactor R20 are selected from a single or composite reactor of a riser and a fluidized bed, and the reactors in this embodiment are all risers; the catalyst regeneration system is provided with a regenerator G10, a settler D10 and stripping section S10; using crude oil F0 as raw material, the desalted and dehydrated crude oil F0 is preheated in the crude oil heating furnace or heat exchanger A0, and then separated into two components according to the boiling point by the crude oil separation tower or flash tower...

Embodiment 1

[0067] use figure 1 The device shown is used to produce ethylene by catalytic conversion of crude oil;

[0068] Crude oil F0 properties: density 0.85, hydrogen content 13.0, K value 12.5, Ni content less than 3.0ppm, V content 0.3ppm; crude oil F0 temperature 135°C; crude oil is fractionated according to the boiling point into crude oil light components with a boiling point below 200°C and crude oil recombination Minute;

[0069] The reaction conditions of the first reactor:

[0070] Crude oil heavy fraction, heated to 355°C, steam atomized;

[0071]The reaction temperature in the lower reaction zone is 520°C, and the reaction time is 1.6 seconds; the reaction temperature in the upper reaction zone is 670°C, and the reaction time is 1.0 seconds; the atomized steam accounts for 10% of the heavy components of crude oil; the total steam volume of the first reactor is 1% of the heavy components of crude oil 35%;

[0072] Second reactor reaction conditions:

[0073] For the li...

Embodiment approach 2

[0081] The method for producing ethylene by catalytic conversion of crude oil in this embodiment adopts figure 2 In the shown device, a reaction system and a catalyst regeneration system are set downstream of the crude oil heating furnace or heat exchanger A0 and the crude oil separation tower or flash tower T00; the reaction system includes a first reactor R10, a second reactor R20, and catalyst regeneration The system is equipped with a regenerator G10, a settler D10, and a stripping section S10; using crude oil F0 as raw material, the desalted and dehydrated crude oil F0 is preheated in the crude oil heating furnace or heat exchanger A0, and the crude oil separation tower or flash tower T00 is used to Separation into two components according to the boiling point, i.e. crude oil heavy component R12 and crude oil light component FOG, the crude oil heavy component R12 and crude oil light component FOG all enter the catalytic conversion ethylene production device for catalytic ...

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Abstract

The invention relates to a method for preparing ethylene through crude oil catalytic conversion, and belongs to the technical field of crude oil catalytic conversion. The crude oil enters a crude oilseparation tower or a flash tower after being heated by a heating furnace or a heat exchanger, and is divided into crude oil light components and crude oil heavy components with higher boiling pointsaccording to the boiling points, and the heavy components are subjected to graded catalytic conversion according to conditions suitable for different components after being further heated; and the crude oil heavy components and light components are subjected to graded catalytic conversion in two reactors respectively, and catalytic cracking and cracking combined crude oil is used for directly preparing ethylene and propylene.

Description

technical field [0001] The invention belongs to the technical field of catalytic conversion of crude oil, and in particular relates to a method for producing ethylene by catalytic conversion of crude oil. The invention also provides a device corresponding to the above method. Background technique [0002] Low-carbon olefins represented by ethylene and propylene are the most basic raw materials in the chemical industry. The existing catalytic conversion technology is to produce low-carbon olefins while producing gasoline and diesel, which is far from meeting the current market demand for organic chemical raw materials. Aromatics is an important organic chemical raw material second only to ethylene and propylene in terms of output and scale. Its derivatives are widely used in the production of chemical products and fine chemicals such as chemical fibers, plastics and rubber. With the continuous development of petrochemical and textile industries, the world's Demand for aromati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C11/04
CPCC07C4/06C07C11/04Y02P20/584Y02P20/10
Inventor 石宝珍李荻郭江伟
Owner QINGDAO JINGRUN PETROCHEM DESIGN INST CO LTD