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Method for preparing aromatic hydrocarbon-rich compound by pyrolysis of mixed shredded cloth

A technology for aromatic hydrocarbon compounds and rich aromatic hydrocarbons, which is used in the preparation of liquid hydrocarbon mixtures, the treatment of hydrocarbon oils, the petroleum industry, etc., to achieve the effect of simple and efficient synthesis.

Inactive Publication Date: 2021-05-07
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese invention patent CN109251777A reports that waste cloth strips and sludge are blended and granulated to prepare fuel particles. CN 111270354A discloses a device for separating fibers from non-woven fabrics or waste fabrics, and uses pyrolysis to convert mixed cloth into pieces Research for high-value chemicals has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The mixed cloth and ZSM-5 are uniformly ground and mixed at a mass ratio of 1:1. At a pyrolysis temperature of 450°C, a heating rate of 10 4 ℃ / s, the pyrolysis atmosphere is pyrolysis under argon, and the pyrolysis time is 20s. The relative content of pyrolysis products is analyzed by gas chromatography-mass spectrometry, including 7.5% of benzene, 21.4% of toluene, 4.5% of naphthalene and 2- Methylnaphthalene 9.8%.

Embodiment 2

[0011] The mixed cloth and ZSM-5 are uniformly ground and mixed at a mass ratio of 1:5, at a pyrolysis temperature of 750°C, and a heating rate of 10 2 ℃ / s, the pyrolysis atmosphere is pyrolysis under argon, and the pyrolysis time is 20s. The relative content of pyrolysis products is analyzed by gas chromatography-mass spectrometry, including 15.5% of benzene, 26.2% of toluene, 6.8% of naphthalene and 2- Methylnaphthalene 12.4%.

Embodiment 3

[0013] The mixed cloth and MCM-41 are uniformly ground and mixed at a mass ratio of 1:12, at a pyrolysis temperature of 550°C, and a heating rate of 10 4 ℃ / s, the pyrolysis atmosphere is pyrolysis under argon, and the pyrolysis time is 20s. The relative content of pyrolysis products is analyzed by gas chromatography-mass spectrometry, including 7.5% of benzene, 20.2% of toluene, 4.1% of naphthalene and 2- Methylnaphthalene 5.5%.

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Abstract

The invention discloses a method for preparing an aromatic hydrocarbon-rich compound by pyrolysis of mixed shredded cloth, which comprises the following steps: mixing the mixed shredded cloth and a molecular sieve according to a mass ratio of 1:1 to 1:15, and carrying out catalytic pyrolysis at 450-750 DEG C in an inert atmosphere environment to prepare the aromatic hydrocarbon compound, wherein the molecular sieve is selected from one or more of MCM-41, ZSM-5, ZSM-35, SBA-15 and H[beta] zeolite, the aromatic hydrocarbon compound comprises benzene, methylbenzene, naphthalene and 2-methylnaphthalene. The molecular sieve is utilized to catalyze selective thermal conversion of the mixed shredded cloth, efficient synthesis of the specific aromatic hydrocarbon compound is facilitated, resource utilization and volume reduction and quantity reduction of the mixed shredded cloth can be achieved, and the total yield of aromatic hydrocarbon can reach 60% or above. In addition, the method is simple and easy to implement, and can be further popularized and applied to resource utilization of other fiber-containing organic solid wastes.

Description

Technical field: [0001] The invention belongs to the field of comprehensive utilization of solid waste, and in particular relates to a method for preparing aromatic-rich compounds by pyrolyzing mixed cloth scraps. Background technique: [0002] The waste textiles produced in my country every year can reach 20 million tons, and mixed cloth scraps are an important part of waste textiles, and their chemical composition mainly includes chemical fibers and natural fibers. At present, there are relatively few studies on the high-value resource utilization of this type of organic solid waste, mainly focusing on the use as solid fuel and chemical fiber regeneration. Chinese invention patent CN109251777A reports that waste cloth strips and sludge are blended and granulated to prepare fuel particles. CN 111270354A discloses a device for separating fibers from non-woven fabrics or waste fabrics, and uses pyrolysis to convert mixed cloth fragments. Research on high-value chemicals has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/10C10G1/02
CPCC10G1/02C10G1/08C10G1/10C10G2300/1003
Inventor 袁浩然张军顾菁王舒笑
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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