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Process for the preparation of aromatic hydrocarbons and compositions obtained by the process

A technology of aromatics and logistics, applied in the field of aromatics preparation, can solve the problems of low carbon utilization rate, high hydrogen consumption, high cost of raw materials, etc., and achieve the effect of low total consumption

Active Publication Date: 2019-01-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the problems of low carbon utilization rate, high hydrogen consumption and high raw material cost in the prior art, and a new method for preparing aromatics is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw material is 1 ton of bagasse, and the dry base cellulose content is 52%. After fully pulverizing the bagasse, stir and mix with 3.5 tons of 1.5% hydrochloric acid aqueous solution, then add 1.2 kg of ferric chloride, and keep the mixed solution at 1.0 MPa and 180°C for 10 minutes under microwave heating conditions to complete the acid reaction. During the hydrolysis process, 248 kilograms of levulinic acid and 95 kilograms of formic acid can be obtained after the liquid phase product is separated. 95 kg of formic acid can be decomposed to obtain 4.1 kg of hydrogen.

[0028] On 2% Ru / C catalyst, the reaction pressure is 1.2MPa, the reaction temperature is 130°C, the molar ratio of hydrogen / levulinic acid is 20, and the space velocity of levulinic acid is 0.3h -1 , the conversion rate of levulinic acid was 98%, and the molar selectivity to methyl tetrahydrofuran was 97.3%. 248 kg of levulinic acid undergoes hydrogenation reaction to generate 175.3 kg of methyl t...

Embodiment 2

[0033] The raw material is 1 ton of rice straw, and the dry base cellulose content is 42.5%. After these rice straws are fully pulverized, add 2.8kg tin tetrachloride, stir and mix with 5 tons of 3.2% sulfuric acid aqueous solution, make the mixed solution keep 30 minutes under the condition of 2.0MPa, 205 ℃ under stirring condition and promptly finish the acidolysis process, The liquid phase product can obtain 169 kilograms of levulinic acid and 70.3 kilograms of formic acid after separation. 70.3 kg of formic acid was decomposed to obtain 3 kg of hydrogen.

[0034] Immerse copper nitrate and nickel nitrate aqueous solution in 150 g ZrO 2 , the mass of metal Cu and Ni used accounted for ZrO 2 15% and 3% by mass, the mixture was impregnated at room temperature for 48 hours, and dried in an oven for 24 hours. The obtained dried catalyst precursor was then placed in a tube furnace for reduction at 500°C for 2 hours. In Cu-Ni / ZrO 2 On the catalyst, the reaction pressure is 3...

Embodiment 3

[0039] The raw material is 1 ton of cellulose, and the dry basis cellulose content is 98.3%. Stir and mix these celluloses with 3.5 tons of 3.7% sulfuric acid aqueous solution, and keep the mixed solution at 3.0MPa and 205°C for 30 minutes under stirring conditions to complete the acidolysis process. After the liquid phase product is separated, 511 kg of acetyl propionic acid and 194 kg formic acid. 194 kg of formic acid was decomposed to obtain 8.3 kg of hydrogen.

[0040] Copper nitrate and zinc nitrate aqueous solutions are impregnated on the alumina-silicon oxide carrier, the quality of the metal copper and zinc used account for 10% and 2% of the carrier mass respectively, the mixture is impregnated at room temperature for 24 hours, and put into an oven Let dry for 24 hours. The obtained dried catalyst precursor was then placed in a tube furnace for reduction at 400°C for 2 hours. In Cu-Zn / SiO 2 On the catalyst, the reaction pressure is 4.0MPa, the reaction temperature...

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Abstract

The invention relates to an aromatic hydrocarbon preparation method and a composition prepared by the aromatic hydrocarbon preparation method. The aromatic hydrocarbon preparation method comprises that a, acetylpropionic acid contacts with a hydrogenation catalyst under hydrogenation conditions and undergoes a reaction to produce a methyltetrahydrofuran flow and b, the methyltetrahydrofuran flow contacts with an aromatization catalyst under aromatization conditions and undergoes a reaction to produce an aromatic hydrocarbon flow containing benzene, toluene and xylene. The preparation method can be used for industrial production of aromatic hydrocarbons such as benzene, toluene and xylene from cellulose-containing biomass raw materials.

Description

technical field [0001] The present invention relates to a method for preparing aromatic hydrocarbons and the composition obtained by the method. Background technique [0002] Aromatics such as benzene, toluene and xylene (BTX) are important basic organic chemical raw materials, and are widely used in many fields that promote national economic and social development. Currently, BTX is produced using petrochemical resources as raw materials, mainly through catalytic reforming and ethylene cracking by-products, and a small amount through coal chemical processes. In the long run, traditional petrochemical raw materials are non-renewable, and the use of petrochemical resources also increases greenhouse gas emissions, which is not in line with the green and low-carbon development strategy. [0003] Biomass is mainly composed of cellulose, hemicellulose and lignin. It is a renewable resource obtained through photosynthesis in nature. It has a wide range of sources and huge reserve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C1/20C07C15/04C07C15/06C07C15/08
CPCY02P20/54
Inventor 郑均林宋奇孔德金徐旋
Owner CHINA PETROLEUM & CHEM CORP
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