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Method for preparing low-carbon olefin and arene by catalytic cracking of raw oil

A catalytic cracking and carbon olefin technology, which is used in the refining and cracking process of multi-stage series, the petroleum industry, and the treatment of hydrocarbon oil, etc. The effect of low agent consumption and low steam consumption

Inactive Publication Date: 2019-02-22
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology cannot solve the cracking problem of polycyclic aromatic hydrocarbons

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  • Method for preparing low-carbon olefin and arene by catalytic cracking of raw oil
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  • Method for preparing low-carbon olefin and arene by catalytic cracking of raw oil

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Embodiment 1

[0035] Reaction experiments were carried out with desalted Russian crude oil and Daqing crude oil respectively. The main properties of the two crude oils are shown in Table 1. Before carrying out the reaction, the light components (naphtha) were extracted by atmospheric distillation respectively, with initial boiling point ~ 200 ° C, wherein the naphtha extracted from Russian crude oil was 23wt%, and the naphtha extracted from Daqing crude oil was 12wt% %.

[0036] Table 1. Main properties of Russian crude oil and Daqing crude oil

[0037]

[0038] The reaction is carried out on a circulating fluidized bed device, the catalyst storage capacity of the reverse regeneration system is 30kg, and the catalyst regeneration temperature is 800°C.

[0039] Attached figure 2 Partition feeding method shown. The operating conditions and reaction product distribution are shown in Table 2. Catalyst oxide composition: SiO 2 / Al 2 o 3 / MgO / Fe 2 o 3 / Na 2 O / V 2 o 5 It is 51 / 42 / 4...

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Abstract

The invention provides a method for preparing low-carbon olefin and arene by catalytic cracking of raw oil. The method is characterized by comprising the following steps: 1) after desalting and dewatering, the raw oil enters a heating furnace for heating, then enters a distilling tower to be divided into light components and heavy components, and the cutting point is between 150 DEG C and 300 DEGC; 2) the light components coming from the tower top and the heavy components coming from the tower bottom carry out reaction at different reaction zones of a same reactor; the light components, namely lightweight fed materials, are firstly contacted and react with a high-temperature regeneration catalyst, and then the heavy components, namely heavyweight fed materials are contacted and react withthe catalyst. Compared with the prior art, the method for preparing the low-carbon olefin and arene by catalytic cracking of the raw oil, provided by the invention, has the following advantages: 1) the adaptability of the raw materials is strong; 2) the metal-pollution resistance of the catalyst is strong, and hydrothermal deactivation can not occur, so that the preparation consumption is low; 3)compared with steam cracking, the energy consumption is low; 4) the single-pass conversion ratio is high and the olefin selectivity is high.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to a method for preparing light olefins and aromatics by catalytic cracking of crude oil. Background technique [0002] The rapid development of new energy vehicles has continuously squeezed the market space of traditional fuel vehicles, which directly affects the refined oil market. In order to adapt to the development of the situation, the transformation from oil refining to chemical industry is inevitable. [0003] Catalytic cracking technology can convert olefins above C4 and heavy oil into ethylene and propylene, and is an ideal refining and chemical integration technology. However, this technique also has limitations. First, the current catalytic cracking technology cannot process residue oil with high metal content, especially residue oil with high vanadium (V) content. When the content exceeds 1 μg / g, the molecular sieve active component of the catalyst will be signif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06
CPCC10G55/06C10G2300/10C10G2400/20C10G2400/30
Inventor 李春义喀山·巴沙尔王国玮李康苗陪陪杨春潮许乃文张强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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