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Process for catalytic cracking of hydrocarbons to produce olefins and aromatic hydrocarbons without steam as diluent

A technology for aromatic hydrocarbons and diluents, which is applied in the field of catalytic cracking of hydrocarbons and can solve the problems of increased reaction time and decreased catalyst activity.

Pending Publication Date: 2022-04-15
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, when catalyst activity decreases, reaction time increases and coking leads to further decrease in catalyst activity
This technical problem is the main obstacle to the industrialization of olefins and aromatics produced by catalytic cracking of molecular sieves

Method used

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  • Process for catalytic cracking of hydrocarbons to produce olefins and aromatic hydrocarbons without steam as diluent
  • Process for catalytic cracking of hydrocarbons to produce olefins and aromatic hydrocarbons without steam as diluent
  • Process for catalytic cracking of hydrocarbons to produce olefins and aromatic hydrocarbons without steam as diluent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (using H 2 Catalytic cracking of naphtha as diluent gas. )

[0040] The reaction condition of embodiment 1 comprises the reaction temperature of 630 ℃ to 670 ℃, 1.2h -1 raw material space velocity, 0.6m 3 / kg gas-oil ratio.

[0041] The results obtained in Example 1 are shown in Table 2. In each cycle, as the reaction time increases, the amount of coking increases and the activity decreases. After regeneration, the initial activity can be restored (burning in air at 700°C for 2 hours). In the initial stage, the target yield can reach 70%. The way in which the reaction temperature is controlled affects the yield and duration of a single operation cycle.

[0042] Table 2: With H 2 Yield of product for 8 cycles of diluent gas

[0043]

Embodiment 2

[0045] (using H 2 +CH 4 Catalytic cracking of naphtha as diluent gas. )

[0046] The reaction condition of embodiment 2 comprises the reaction temperature of 630 ℃ to 660 ℃, 1.2h -1 Raw material space velocity, 0.83m 3 / kg gas-oil ratio and H 2 :CH 4 =1:1. The results obtained in Example 2 are shown in Table 3.

[0047] Table 3: With H 2 :CH 4 Yield for the product of the dilution gas

[0048] Response time (hours) 0.5 2.1 3.7 5.3 6.9 temperature(°C) 630 630 640 650 660 CH 4

Embodiment 3

[0050] (using CH 4 Catalytic cracking of naphtha as diluent gas. )

[0051] The reaction condition of embodiment 3 comprises the reaction temperature of 630 ℃ to 660 ℃, 1.2h -1 The raw material space velocity and 0.6m 3 / kg gas-oil ratio.

[0052] The results obtained in Example 3 are shown in Table 4.

[0053] Table 4: In CH 4 Yield for the product of the dilution gas

[0054] Response time (hours) 0.5 2.1 3.7 5.3 6.9 temperature(°C) 630 630 640 650 660 CH 4

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PUM

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Abstract

A process for preparing olefins and / or aromatic hydrocarbons is disclosed. The process comprises catalyzing a hydrocarbon cracking reaction with a catalyst comprising a mixture of ZSM-5 zeolite modified with lanthanum and USY zeolite. The cracking process includes providing a diluent comprising predominantly methane to the reactor, wherein no steam is provided as diluent to the reactor.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 62 / 883,057, filed August 5, 2019, the entire contents of which are incorporated herein by reference in their entirety. technical field [0003] The present invention generally relates to the catalytic cracking of hydrocarbons. More specifically, the present invention relates to the catalytic cracking of hydrocarbons to produce olefins and / or aromatics under steam-free conditions. Background technique [0004] Light olefins (ethylene, propylene, and butene) and aromatics (benzene, toluene, and xylene (BTX)) are important building blocks for the preparation of other chemical products. Therefore, a large part of the petrochemical industry is involved in the production process of these basic materials. Currently, low-carbon olefins and aromatics are mainly produced by pyrolysis and aromatization (steam cracking) of naphtha. Steam cracking of hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05B01J29/80
CPCB01J29/088B01J29/405B01J29/80C10G11/05C10G2400/30C10G2400/20C10G2300/805B01J2229/24Y02P30/40C10G2300/4006C10G2300/4018C10G2300/708C10G2300/80
Inventor 谢鹏李铭芝刘中民刘海涛李金哲塔拉勒·卡勒德·阿尔沙马里
Owner SABIC GLOBAL TECH BV
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