A processing technology for producing olefins and aromatics from inferior heavy oil

A low-quality heavy oil and processing technology technology is applied in the processing technology of aromatic hydrocarbons and the field of producing olefins from low-quality heavy oil. , the effect of improving the reaction efficiency

Active Publication Date: 2020-12-29
上海竣铭化工工程设计有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of this, the present invention aims to propose a method for producing olefins and aromatics from inferior heavy oil, so as to solve the problems in the prior art that inferior heavy oil is difficult to utilize, the catalyst is easily deactivated during the treatment process, and the coking rate of equipment is high. Olefins, Aromatics

Method used

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  • A processing technology for producing olefins and aromatics from inferior heavy oil
  • A processing technology for producing olefins and aromatics from inferior heavy oil
  • A processing technology for producing olefins and aromatics from inferior heavy oil

Examples

Experimental program
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Effect test

Embodiment 1

[0074] When the content of metal impurities in inferior heavy oil is ≥400ppm and the content of Kang’s residual carbon is >20%, the combined hydrogenation technology of 3 ebullating beds connected in series is used for raw material pretreatment, see the attached figure 2 , the whole process is described as follows:

[0075] S1: Pump low-quality heavy oil into the hydrogenation reaction unit through the main pipeline 14, open the first feed pipe 112, the first series pipe 111, and the second series pipe 121 in sequence, and simultaneously close the second feed pipe 122 and the third feed pipe. The pipe 132 is pumped into the third ebullating bed 11, the first ebullating bed 12, and the second ebullating bed 13 in sequence, and is respectively mixed with hydrogen to carry out reaction hydrogenation; the catalyst is a Ni-Mo-based microsphere catalyst, and the reaction conditions are: Pressure 16MPa, inlet temperature 250℃, volume space velocity 0.9h -1 , Reaction temperature 39...

Embodiment 2

[0084] Such as image 3 As shown, in this example, on the basis of Example 1, the non-aromatic components of naphtha extracted from aromatics are subjected to catalytic cracking in a fixed-bed reactor to produce olefins.

[0085] When 15% of the inferior heavy oil is less than the content of Kang’s residual carbon and less than 20%, and the content of metal impurities is less than 150ppm, the combined hydrogenation technology of two ebullating beds in series is used for raw material pretreatment. The whole process is described as follows:

[0086] S1: Pump the inferior heavy oil into the hydrogenation reaction unit through the main pipeline 14, close the first feed pipe 112, the first series pipe 111, and the third feed pipe 132, and the inferior heavy oil passes through the second feed pipe 122, the second series pipe Pipe 121 is then pumped into the first ebullating bed 12 and the second ebullating bed 13 in sequence, and then mixed with hydrogen for reaction and hydrogenati...

Embodiment 3

[0096] Such as Figure 4 As shown, on the basis of Example 1, this example is combined with a butene aromatization reactor. This process belongs to a local process optimization under the conditions that both the processing capacity of butene and the market of aromatics are applicable. Does not affect the scope of protection of this patent.

[0097] When the content of Kang’s residual carbon in inferior heavy oil is less than 15%, and the content of metal impurities is less than 150ppm, a combined hydrogenation technology with a series of fluidized beds is used for raw material pretreatment. The whole process is described as follows:

[0098] S1: The inferior heavy oil is pumped into the second hydrogenation reaction zone 10 of the hydrogenation reaction unit through the main pipeline 14, the first feed pipe 112, the second feed pipe 122, and the second series pipe 121 are closed, and the inferior heavy oil passes through the third feed The pipe 132 enters the second ebullatin...

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Abstract

The invention provides a method for producing olefins and aromatics from inferior heavy oil. The method for producing the olefins and the aromatics from the inferior heavy oil comprises the steps thatthe inferior heavy oil is subjected to boiling bed hydrogenation, catalytic cracking is performed in a catalytic cracking riser reactor, and a reaction product enters a fractionation absorption and stabilization unit; the gas fraction obtained by fractionation enter a gas fine separation unit, the separated C2+ alkane gas is fed to a steam cracking unit to further produce the olefins; and naphthaobtained by fractionation enters an aromatics extraction unit to obtain benzene, toluene and xylene products; and heavy circulating oil obtained by fractionation and oil slurry are returned to a pre-treatment process. According to the method for producing the olefins and the aromatics from the inferior heavy oil, the requirements on raw materials is reduced to the greatest extent, the conversionratio of the inferior heavy oil into the high-value-added olefins and aromatics is improved, the problems of catalyst deactivation and coking are effectively alleviated, the operating cycle of production equipment is prolonged, and the economic benefit is maximized.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, in particular to a processing technology for producing olefins and aromatics from inferior heavy oil. Background technique [0002] Ethylene, propylene, and butadiene are basic raw materials in the petrochemical industry. With the development of the economy, their usage is increasing rapidly year by year. In order to meet the needs of these low-carbon olefins, conventional steam cracking technology is still being constructed and developed, and it is still the largest source of low-carbon olefins. At the same time, the technology of catalytic cracking to produce more olefins has also been developed rapidly and has become one of the sources of low-cost olefins. However, its output is limited and has no decisive impact on the market supply of low-carbon olefins. Aromatic hydrocarbons represented by benzene, toluene and xylene are also important organic chemical raw materials, widely used in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G69/04
CPCC10G69/04C10G2400/30
Inventor 韩保平张小康刘江张琪
Owner 上海竣铭化工工程设计有限公司
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