Method for producing light aromatic hydrocarbon

A technology for light aromatic hydrocarbons and products, applied in the field of light aromatic hydrocarbon production, can solve the problems of low yield of light aromatic hydrocarbons, etc., and achieve the effects of high selectivity, content reduction, and economical improvement

Active Publication Date: 2021-07-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention provides a method for producing light aromatics to at l

Method used

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  • Method for producing light aromatic hydrocarbon
  • Method for producing light aromatic hydrocarbon
  • Method for producing light aromatic hydrocarbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 produces the method for light aromatics

[0048] figure 1 It is a schematic diagram of the technological process for increasing the production of light aromatics in this embodiment, such as figure 1 As shown, the method for producing light aromatics in the present embodiment comprises the steps:

[0049] 1) In the presence of the first catalyst, perform a first aromatization reaction on the material to be reacted including low-carbon oxygen-containing organic compounds to obtain a first aromatization product;

[0050] Specifically, the materials to be reacted and the dilution gas are mixed according to a certain mass ratio (to form raw material gas), and after being properly preheated, they are passed into the first reactor 1 equipped with the first catalyst, and the materials to be reacted are contacted with the first catalyst, Under certain conditions of temperature, pressure (inlet pressure of the reactor), and mass space velocity (including the mass s...

Embodiment 2

[0060] The preparation of embodiment 2 catalyst

[0061] Prepare the first catalyst A1-A5, the second catalyst B1-B5 according to the following process:

[0062] 1) A1-A2 preparation process:

[0063] Primary metal modification: ZSM-5 molecular sieves are impregnated with equal volumes in a solution containing the first metal element, followed by drying and calcining to obtain the corresponding first catalyst.

[0064] 2) A3-A4 preparation process:

[0065] (1) Primary metal modification: the ZSM-5 molecular sieve is impregnated with an equal volume of a solution containing the first metal element, followed by drying and roasting to obtain a metal-modified ZSM-5 molecular sieve;

[0066] (2) Secondary metal modification: using a solution containing the first metal element to impregnate the metal-modified ZSM-5 molecular sieve with an equal volume, followed by drying and roasting to obtain the corresponding first catalyst.

[0067] 3) B1-B5 preparation process:

[0068] (1)...

Embodiment 3- Embodiment 7

[0077] Embodiment 3-Example 7 respectively use the first catalysts A1-A5 / second catalysts B1-B5 of Example 2, and produce aromatics according to the method of Example 1.

[0078] Specifically, in Example 3-Example 7, the low-carbon oxygen-containing organic compound used, the mass ratio of the material to be reacted and the diluent gas, the first reactor, and the temperature in the first aromatization reaction condition (ie step 1) , pressure, mass space velocity), the second reactor, the mol ratio of alkane component and preheated methanol, the reaction parameters such as temperature, pressure, mass space velocity) in the second aromatization reaction conditions (ie step 4) are all as Shown in Table 3, the product composition of the final reaction product of embodiment 3-embodiment 8 is shown in table 4.

[0079]The reaction parameter of table 3 embodiment 3-embodiment 7

[0080]

[0081] Table 4 embodiment 3-embodiment 7 final reaction product composition

[0082]

...

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Abstract

The invention provides a method for producing light aromatic hydrocarbon, which comprises the following steps: 1) in the presence of a first catalyst, carrying out first aromatization reaction on a to-be-reacted material containing a low-carbon oxygen-containing organic compound to obtain a first aromatization product; 2) separating the first aromatization product to separate an olefin component and an alkane component from the first aromatization product to obtain a target product; 3) returning the olefin component to the step 1) to carry out a first aromatization reaction; 4) in the presence of a second catalyst, carrying out a second aromatization reaction on the alkane component and methanol to obtain a second aromatization product; and 5) returning the second aromatization product and combining the second aromatization product into the first aromatization product for separation. The method for producing the light aromatic hydrocarbon has the advantages of high yield of the light aromatic hydrocarbon, great economic benefit and the like.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and in particular relates to a method for producing light aromatic hydrocarbons. Background technique [0002] Aromatic hydrocarbons are hydrocarbons containing a benzene ring structure in the molecule. Light aromatic hydrocarbons BTX (benzene, toluene, xylene) are important organic chemical raw materials, of which benzene and xylene are used for the manufacture of various synthetic resins, synthetic rubbers, and synthetic fibers. raw material, while toluene can be converted to xylene and benzene. At present, light aromatics BTX mainly comes from petroleum resources, and the shortage of petroleum resources in my country determines the shortage of aromatics resources. Therefore, a new technology to replace petrochemical production of aromatics is urgently needed. At this stage, the direct conversion of resource-rich methanol to aromatics is an important research direction. [0003] The re...

Claims

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Application Information

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IPC IPC(8): C07C1/20C07C15/08C07C15/04B01J29/44B01J29/40B01J29/48
CPCC07C1/20B01J29/44B01J29/405B01J29/48C07C15/08C07C15/04Y02P20/52
Inventor 徐亚荣冯丽梅蒋斌波许磊刘键张力贺春梅林春兴
Owner PETROCHINA CO LTD
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