Method for producing light arene and light alkane from hydrocarbon raw material

A technology for light aromatics and light alkanes, which is applied in the treatment of hydrocarbon oil, petroleum industry, hydrotreating processes, etc. High degree of base, good activity and stability, and the effect of increasing concentration

Active Publication Date: 2009-01-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the process of separating aromatics from traditional hydrocarbon raw materials requires solvent extraction, the process is complicated,

Method used

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  • Method for producing light arene and light alkane from hydrocarbon raw material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Use tetrapropylammonium hydroxide (TPAOH) solution, tetraethylorthosilicate (TEOS) and water according to (TPA) 2 O: 5.5TEOS: 90H 2 The molar ratio of O was mixed and stirred evenly, aged and refluxed at 80° C. for three days to obtain the ZSM-5 seed crystal directing agent. Take by weighing 180 grams of white carbon black, 10 grams of squash powder, aqueous solution containing 19.7 grams of sodium aluminate and 40 grams of ZSM-5 seed crystal directing agent, then add 230 grams of silica sol (40% by weight) and an appropriate amount of water to carry out After kneading and forming, drying is carried out to obtain a cylindrical precursor. A mixture of 35 grams of ethylenediamine and 5 grams of distilled water was added to the reaction kettle in advance, and 150 grams of the above-prepared cylindrical precursor was placed in the reaction kettle above the porous stainless steel mesh and sealed at 160 ° C for 5 days. . The product was washed and dried with distilled wate...

Embodiment 2

[0024] Take by weighing 100 grams of white carbon black and 20 grams of ultra-stable Y zeolite zeolite (SiO 2 / Al 2 o 3 Molar ratio is 16) the ZSM-5 seed crystal directing agent of 20 grams among the mixed embodiment 1, adds the Al containing 26 grams 2 (SO 4 ) 3 18H 2 An aqueous solution of O was used to adjust the silicon-aluminum ratio of the mixture, and 150 grams of silica sol (40% by mass) was added for kneading and shaping, followed by drying to obtain a cylindrical precursor. A mixture of 34 grams of ethylamine and distilled water was added to the reaction kettle in advance, and 100 grams of the above-prepared cylindrical precursor was placed in the reaction kettle above the porous stainless steel mesh, sealed, and then subjected to gas-solid phase treatment at 180° C. for 5 days. After the product was taken out, it was washed with distilled water, dried in the air, and then calcined at 550° C. in an air atmosphere to obtain a binder-free ZSM-5 / USY zeolite. Then ...

Embodiment 3

[0026] Take by weighing 180 grams of white carbon black and 140 grams of beta type zeolite (SiO 2 / Al 2 o 3 The mol ratio is 20) the ZSM-5 seed crystal directing agent of 40 grams among the mixed embodiment 1, adds and contains 110 grams of Al 2 (SO 4 ) 3 18H 2 The O aqueous solution adjusted the silicon-aluminum ratio of the mixture, and then added 220 grams of silica sol (40% by mass) for kneading and shaping, and then dried to obtain a cylindrical precursor. A mixture of 40 grams of ethylamine and distilled water was pre-added into the reaction kettle, and 100 grams of the above-prepared cylindrical precursor was placed in the reaction kettle above the porous stainless steel mesh and sealed, and then gas-solid phase treatment was performed at 150 ° C for 7 days. After the product was taken out, it was washed with distilled water, dried in the air, and then calcined at 550° C. in an air atmosphere to obtain a binder-free ZSM-5 / beta zeolite. Then carry out ion exchange ...

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Abstract

The invention relates to a method for producing lightweight arene and lightweight alkane by utilizing a hydrocarbon material, which mainly solves the technical problems that the hydrocarbon material needs a solvent for extraction in the prior separation process and has the complex process and high cost; and heavyweight arene and the separated non-arene have low utilization value. The method comprises the following technical proposal: in the presence of a zeolite catalyst containing Pt or Pd, the hydrocarbon material with a boiling point of between 30 and 250 DEG C is adopted; the heavyweight arene in the hydrocarbon material has transalkylation reaction with the lightweight arene by hydrodealkylation groups; the lightweight arene is subjected to isomerization reaction and transformed into a component abundantly containing BTX(B is benzene, T is toluene and X is xylene) lightweight arene; non-arene has hydrocracking reaction to generate lightweight alkane ; in a distillation tower, according to different boiling points, liquid phase products can be respectively separated into benzene, toluene, xylene and C9<+> arene; and the lightweight arene can be separated from gas phase products, thereby well solving the problems and being used in the industrial production of the lightweight arene.

Description

technical field [0001] The invention relates to a method for producing light aromatics and light alkanes from hydrocarbon raw materials. Background technique [0002] In industry, the reformed product produced by the reforming process and the pyrolysis gasoline obtained from naphtha cracking are generally separated by solvent extraction to separate BTX aromatics and non-aromatics. This process is based on the extreme concentration of aromatics and non-aromatics in the used solvent different properties to achieve the purpose of separating the target aromatics. Although solvent extraction of BTX can obtain higher purity BTX aromatics, it requires a complex solvent extraction device, and the extraction solvent needs to be continuously replenished during the extraction operation, so the solvent extraction process occupies a large part of the system. Take a huge percentage of the cost of BTX aromatics. US Patent No. 4,058,454 relates to a solvent extraction method for separatin...

Claims

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Application Information

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IPC IPC(8): C10G69/10
Inventor 刘仲能王德举李学礼汪哲明
Owner CHINA PETROLEUM & CHEM CORP
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