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Method for preparing aromatic hydrocarbon and cyclopentenone from biomass derivative gamma-valerolactone by catalytic conversion

A technology for catalytic conversion and cyclopentenone, applied in chemical instruments and methods, preparation of heterocyclic compounds, organic chemistry, etc., can solve problems such as poor stability, improve dehydrogenation performance, selectively promote, and inhibit partial polymerization reactions Effect

Inactive Publication Date: 2014-12-24
湖南清欣绿色环保有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Patent CN103664475A discloses a method for aromatization of low-carbon hydrocarbons, which mainly solves the problem of poor stability of low-carbon aromatization catalysts in the prior art

Method used

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  • Method for preparing aromatic hydrocarbon and cyclopentenone from biomass derivative gamma-valerolactone by catalytic conversion
  • Method for preparing aromatic hydrocarbon and cyclopentenone from biomass derivative gamma-valerolactone by catalytic conversion
  • Method for preparing aromatic hydrocarbon and cyclopentenone from biomass derivative gamma-valerolactone by catalytic conversion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] GVL aromatization: The thermal decomposition of GVL was carried out in a tubular reactor made of quartz glass, and the experimental results are shown in Table 1.

[0024] Table 1 The reaction results of GVL under various catalysts

[0025]

[0026] Reaction conditions: reaction temperature, 500 °C; catalyst, 0.5 g; GVL, 2.5 g (flow rate 2.4 ml / h) and N 2 , 30 ml / min; reaction time: 60 min.

[0027] Carbon Yield%

[0028] It can be seen from Table 1 that Zn / ZSM-5 can obtain 99.53% aromatic hydrocarbon yield, and HZSM-5 can obtain 10.83% cyclopentenone yield.

Embodiment 2

[0030] The GVL aromatization method is the same as in Example 1, except that 1.3% Zn / ZSM-5 is selected as the catalyst, and the influence of different catalyst dosages on the reaction yield is investigated. The experimental results are shown in Table 2.

[0031] Table 2 Effect of catalyst dosage on GVL catalytic conversion products

[0032]

[0033] Reaction conditions: reaction temperature, 500 ℃; catalyst 1.3%Zn / ZSM-5; GVL, 4.6 g (flow rate 2.4 ml / h); N 2 , 30 ml / min; reaction time: 100 min.

[0034] Carbon Yield %.

[0035] It can be seen from Table 2 that when the amount of catalyst used increases gradually, the conversion rate of the product increases, the yield of aromatics increases, the yield of cyclopentenone first decreases and then increases, the percentage of liquid products increases first and then decreases, and the percentage of gas gradually increases. reduce.

Embodiment 3

[0037] The GVL aromatization method is the same as in Example 1, except that 1.3% Zn / ZSM-5 is selected as the catalyst, and the yield of the product at different temperatures is investigated. The experimental results are shown in Table 3.

[0038] Table 3 Catalytic conversion of GVL at different temperatures

[0039]

[0040] Reaction conditions: Catalyst 1.3%Zn / ZSM-5, 0.5 g; GVL, 2.5 g (flow rate 2.4 ml / h) and N 2 , 30 ml / min; reaction time: 60 min.

[0041] Carbon Yield %.

[0042] It can be seen from Table 3 that, generally, at 450 °C, the GVL conversion and the yield of aromatics are lower, and the yield of aromatics increases at higher temperatures. Generally, at 500°C, the highest yield of aromatic products is obtained. However, at 550 °C, the yield of aromatics starts to decrease, because aromatics at this temperature can also undergo thermal decomposition, resulting in more gas products. The yields of benzene and toluene increased gradually, while the yields of...

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Abstract

The invention relates to a method for preparing aromatic hydrocarbon and cyclopentenone from biomass derivative gamma-valerolactone by catalytic conversion, which comprises the following steps: (1) using biomass derivative gamma-valerolactone as a raw material, which is prepared by carrying out hydrogenation reaction on levulinic acid; (2) introducing one or more transition metals into a zeolite molecular sieve, and preparing a reaction catalyst at the reaction temperature of 350-550 DEG C by using a fixed bed or fluid bed as a reactor; (3) in an inert or reducing atmosphere, carrying out contact reaction on the raw material gamma-valerolactone and catalyst under the reaction pressure of 0-10 MPa; and (4) after the pyrolysis gas is condensed, collecting the liquid product in the condensation receiver, thereby obtaining the aromatic hydrocarbon product (of benzene, toluene and xylene) and the cyclopentenone product. By using the renewable biomass derivative gamma-valerolactone as the raw material, the method has the advantage of milder reaction conditions, and the catalyst is simple to prepare and easy to recover and reuse.

Description

technical field [0001] The invention relates to a method for preparing aromatic hydrocarbons and cyclopentenone by catalytic conversion of biomass derivative gamma-valerolactone. Background technique [0002] Using biomass as raw material to develop fuel alcohol, biodiesel, biohydrogen and other biomass energy and bio-based chemicals will provide a powerful technology to solve the foreseeable future energy crisis and resource crisis, and to ensure national security and economic development support. Biomass is the only renewable resource that can replace fossil resources to obtain liquid fuels and chemicals. In recent years, the research on catalytic conversion of biomass to prepare various platform compounds has attracted more and more attention. Like levulinic acid (LA), gamma -Valerolactone (GVL) is also considered as a new type of biomass-based platform compound with wide application potential, which is of great significance for its efficient catalytic conversion and ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/213C07C15/04C07C15/06C07C15/08C07C45/59C07C49/597
Inventor 夏海岸戴雨辰张军左宋林
Owner 湖南清欣绿色环保有限公司
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