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Preparation method of aromatic hydrocarbons

A technology for aromatic hydrocarbons and aromatization, applied in the direction of oxidative preparation of carboxylic acids, chemical instruments and methods, carbon compound catalysts, etc., can solve the problems of unavoidable generation of olefin species, catalyst deactivation, etc. The effect of reducing the frequency of regeneration and prolonging the service life

Active Publication Date: 2021-03-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is the inevitable generation of olefin species in the aromatization process of levulinic acid compounds, thereby generating carbon deposition and causing catalyst deactivation, and providing a new method for preparing aromatic hydrocarbons

Method used

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  • Preparation method of aromatic hydrocarbons
  • Preparation method of aromatic hydrocarbons

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Experimental program
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Effect test

Embodiment 1

[0038] Weigh 50 grams of bagasse, place in an autoclave and add 500 grams of water, then add a 5mol / L hydrochloric acid solution with 5% water mass, heat up to 180°C and react for 1 hour, then cool, and the cooled reaction Liquid filtration, obtain filter cake and filtrate, and filtrate is the hydrolyzate of cellulose, and after reaction finishes, adopts mass spectrometry to identify reaction result and main product is levulinic acid, and its production amount is 16 grams.

[0039] Weigh 5 grams of WO that has been dried at 120°C to remove water for 12 hours 3 / ZrO 2 Catalyst, loaded into a fixed bed reactor. The reaction substrate is levulinic acid + methanol (60 / 40), gravimetric space velocity 0.3 hours -1 , hydrogen pressure 1.0MPa, flow 50ml min -1 , temperature 450°C. After the reaction, the qualitative analysis of the reaction results was carried out by mass spectrometry, and the quantitative analysis of the reaction results was carried out by chromatography. The ...

Embodiment 2

[0041] Weigh 5 grams of WO that has been dried at 120°C to remove water for 12 hours 3 / ZrO 2 Catalyst, loaded into a fixed bed reactor. The reaction substrate is acetoacetic acid + Ethanol (90 / 10), gravimetric space velocity 1.0 hours -1 , hydrogen pressure 2.0MPa, flow rate 20ml min -1 , temperature 420°C. After the reaction, the qualitative analysis of the reaction results was carried out by mass spectrometry, and the quantitative analysis of the reaction results was carried out by chromatography. Acetoacetic acid conversion was 94% with a T60 of 947 hours.

Embodiment 3

[0043] Weigh 5 grams of WO that has been dried at 120°C to remove water for 12 hours 3 / ZrO 2 Catalyst, loaded into a fixed bed reactor. The reaction substrate is levulinic acid + methanol (99 / 1), gravimetric space velocity 3.0 hours -1 , hydrogen pressure 1.0MPa, flow rate 20ml min -1 , temperature 400°C. After the reaction, the qualitative analysis of the reaction results was carried out by mass spectrometry, and the quantitative analysis of the reaction results was carried out by chromatography. The conversion of levulinic acid was 97%, and the T60 was 1004 hours.

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Abstract

The invention relates to a method for preparing aromatic hydrocarbons. The method comprises the step of preparing the aromatic hydrocarbons through subjecting an oxygen-containing raw material and a composite metallic oxide catalyst to contact under aromatization reaction conditions in the presence of an alcoholic compound R3OH, wherein the oxygen-containing raw material has a structural formula (I) shown in the description. In the formula (I), R1 is optional substituted C1-8 linear-chain or branched-chain alkyl or optional substituted C2-8 linear-chain or branched-chain alkenyl; R2 is H or optional substituted C1-10 linear-chain or branched-chain alkyl, wherein n is a positive integer of 1 to 6; R3 is optional substituted C1-20 linear-chain or branched-chain alkyl, optional substituted C2-20 linear-chain or branched-chain alkenyl or optional substituted C3-20 linear-chain or branched-chain cycloalkyl.

Description

technical field [0001] The invention relates to a method for preparing aromatic hydrocarbons, in particular to a method for producing BTX aromatic hydrocarbons. The present invention further relates to a method for producing p-xylene and terephthalic acid based on the method for producing aromatic hydrocarbons. Background technique [0002] Aromatic products are widely used in many fields such as polyester, chemical fiber, rubber, medicine, and fine chemicals. The domestic consumption is considerable, which has an important impact on the development of the national economy. At the same time, it is an important basic organic chemical raw material for social development. Benzene, toluene, and xylene are three aromatic bulk chemicals widely used in aromatics, collectively referred to as light aromatics or BTX aromatics. Benzene is a versatile basic petrochemical raw material that can be used to produce numerous products derived from it, including ethylbenzene / styrene, cumene / p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/207C07C15/08C07C15/04C07C15/06C07C51/16C07C63/26
CPCC07C1/207C07C51/16C07C2523/30C07C15/08C07C15/04C07C15/06C07C63/26
Inventor 宋奇孔德金郑均林
Owner CHINA PETROLEUM & CHEM CORP