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Method for efficient preparation of biomass based aromatic hydrocarbon

A technology based on biomass and aromatics, applied in chemical instruments and methods, hydrocarbon production from oxygen-containing organic compounds, bulk chemical production, etc., can solve the problems of long reaction steps, low yield of aromatics, low energy consumption, etc.

Active Publication Date: 2016-04-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The third technical problem to be solved by the present invention is to provide a method for aromatizing biomass-based compounds to produce aromatics with a catalyst corresponding to the first technical problem and the second technical problem, which has the advantages of low energy consumption, atom economy High adaptability and wide adaptability, solve the problems of low yield of aromatics and long reaction steps in the process of producing aromatics from biomass in the past, and provide a new method for producing aromatics from biomass

Method used

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  • Method for efficient preparation of biomass based aromatic hydrocarbon
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 35 grams of ZSM-5 with a silicon-aluminum ratio of 25 and mix it with 35 grams of γ-alumina additive, add 2.7 grams of scallop powder, and mix well. Then add 48 grams of nitric acid aqueous solution with a mass percentage of nitric acid of 5.5%, knead and shape, and extrude. The obtained catalyst precursor was dried at 120° C. for 8 hours and calcined at 500° C. for 2 hours to obtain a molecular sieve catalyst. Catalyst activity evaluation is carried out on a fixed bed, the reaction conditions are 3 grams of catalyst mass, 2,5-dimethylfuran as the reaction substrate, and 1.0 hour weight space velocity -1 , hydrogen pressure 1.0MPa, flow 50mlmin -1 , temperature 400°C. After the reaction, the conversion rate of the reaction substrate was 49%, and the selectivity of BTX was 66%.

Embodiment 2

[0024] Weigh 35 grams of Y molecular sieve with a silicon-aluminum ratio of 6 and mix with 35 grams of γ-alumina additive, add 2.7 grams of scallop powder, and mix well. Then add 48 grams of nitric acid aqueous solution with a mass percentage of nitric acid of 5.5%, knead and shape, and extrude. The obtained catalyst precursor was dried at 120° C. for 8 hours and calcined at 500° C. for 2 hours to obtain a molecular sieve catalyst. Catalyst activity evaluation is carried out on a fixed bed, the reaction conditions are 3 grams of catalyst mass, 2,5-dimethylfuran as the reaction substrate, and 1.0 hour weight space velocity -1 , hydrogen pressure 1.0MPa, flow 50mlmin -1 , temperature 400°C. After the reaction, the conversion rate of the reaction substrate was 44%, and the selectivity of BTX was 62%.

Embodiment 3

[0026] Weigh 35 grams of beta molecular sieve with a silicon-aluminum ratio of 30 and mix with 35 grams of γ-alumina additive, add 2.7 grams of scallop powder, and mix well. Then add 48 grams of nitric acid aqueous solution with a mass percentage of nitric acid of 5.5%, knead and shape, and extrude. The obtained catalyst precursor was dried at 120° C. for 8 hours and calcined at 500° C. for 2 hours to obtain a molecular sieve catalyst. Catalyst activity evaluation is carried out on a fixed bed, the reaction conditions are 3 grams of catalyst mass, 2,5-dimethylfuran as the reaction substrate, and 1.0 hour weight space velocity -1 , hydrogen pressure 1.0MPa, flow 50mlmin -1 , temperature 400°C. After the reaction, the conversion rate of the reaction substrate was 46%, and the selectivity of BTX was 56%.

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Abstract

The invention relates to a method for efficient preparation of biomass based aromatic hydrocarbon, and mainly solves the problem of low aromatization efficiency in the process of preparing aromatic hydrocarbon from biomass based furan derivatives. According to a technical scheme, a multicomponent composite molecular sieve with synergistic effect is employed for aromatization of a furan compound, the reaction temperature is 300-800DEG C, the hydrogen pressure is 0.1-5MPa, and the weight space velocity is 0.3-10h<-1>. Catalytic aromatization is carried out on the furan compound to perform high selectivity preparation of benzene, toluene, xylene and other aromatic compounds, the raw material conversion rate and the selectivity of benzene, toluene and xylene all reach more than 80%. Through the synergistic effect of the molecular sieve in the catalyst, the method improves the aromatization efficiency of the furan compound, well solves the problem of low efficiency in preparation of benzene, toluene and xylene from biomass based furan compounds, and can be used for the field of preparation of aromatic hydrocarbon from non-fossil resources.

Description

technical field [0001] The invention relates to a method for efficiently preparing biomass-based aromatic hydrocarbons, especially a method for converting them into important basic organic chemical raw materials such as benzene, toluene and xylene. Background technique [0002] BTX is the abbreviation of three types of aromatic hydrocarbons, benzene, toluene and xylene. BTX is an important basic organic chemical raw material for social development. Various product chains can be derived from itself or through reproduction. The products are widely used in many fields such as polyester, chemical fiber, rubber, medicine and fine chemicals, and the domestic consumption has reached thousands. It has an important impact on the development of the national economy. 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...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/08B01J29/70B01J29/80C07C1/20C07C15/08C07C15/04C07C15/06
CPCY02P20/52
Inventor 宋奇孔德金郑均林
Owner CHINA PETROLEUM & CHEM CORP
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