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A method for the synthesis of aromatic hydrocarbons by aromatization

A technology of chemical synthesis and aromatization, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc.

Active Publication Date: 2019-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the conversion of levulinic acid is mainly concentrated in the conversion to fine chemicals such as alcohols and esters, and there are few reports on the conversion of levulinic acid to aromatics such as benzene, toluene, and xylene.

Method used

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  • A method for the synthesis of aromatic hydrocarbons by aromatization
  • A method for the synthesis of aromatic hydrocarbons by aromatization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 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.

[0023] Weigh 5 g of SO2 that was dried at 120°C for 12 hours 4 2－ / ZrO 2 Catalyst, loaded into a fixed bed reactor. The reaction substrate is levulinic acid Weight airspeed 0.3 hours -1 , hydrogen pressure 1.0MPa, flow 50ml 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 reaction substrate conversion rate is 99%, and the ...

Embodiment 2

[0025] Weigh 5 g of S 2 o 8 2－ / ZrO 2 Catalyst, loaded into a fixed bed reactor. The reaction substrate is acetoacetic acid Weight Airspeed 1.0 Hours -1 , hydrogen pressure 1.0MPa, flow rate 20ml 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 reaction substrate conversion rate is 90%, and the selectivity of BTX is 93%.

Embodiment 3

[0027] Weigh 5 g of SO2 that was dried at 120°C for 12 hours 4 2－ / TiO 2 Catalyst, loaded into a fixed bed reactor. The reaction substrate is levulinic acid Weight Airspeed 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 rate of the reaction substrate was 89%, and the selectivity of BTX was 87%.

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Abstract

The invention relates to a method for preparing aromatic hydrocarbons through aromizing. Raw materials are in contact with solid strong acid catalysts, under aromizing conditions, to prepare the aromatic hydrocarbon material flow, which contains benzenes, methyl benzenes and xylenes. The raw materials have a structural formula (I) shown in the description. In the formula (I), R 1 is optional substitutive linear or branched alkyl from C 1 to C 8; R 2 is hydrogen, optional substitutive linear or branched alkyl from C 1 to C 10; and n is positive integers from 1 to 6. The method can be applied to the preparation field of aromatic hydrocarbons through non-fossil resources.

Description

technical field [0001] The invention relates to a method for aromatizing and synthesizing aromatic hydrocarbons, in particular to a method for preparing benzene, toluene and xylene light aromatic hydrocarbons by aromatizing. 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 aromatic hydrocarbons. Benzene is a versatile basic petrochemical raw material that can be used to produce numerous products derived from it, including ethylbenzene / styrene, cumene / phenol, and more. Paraxylene is mainly used in the manufacture of terephthalic acid, via terephthalic acid (PTA) or diethyl terephthalate (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/207C07C15/04C07C15/06C07C15/08
Inventor 宋奇孔德金祁晓岚郑均林
Owner CHINA PETROLEUM & CHEM CORP