Co-production method of monophenol compound and activated carbon by lignin catalytic pyrolysis

A single phenolic compound, catalytic pyrolysis technology, applied in chemical instruments and methods, preparation of organic compounds, carbon compounds, etc., can solve the problem of insufficient conversion, harsh and complex research process, and the lack of by-products of thermal conversion of lignin. Improve utilization and other issues to achieve the effect of increasing productivity, simple process, improving utilization rate and utilization value

Active Publication Date: 2017-03-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for the co-production of monophenolic compounds and activated carbon by catalytic thermal cracking of lignin, in view of the harsh and complicated research process of lignin thermal conversion, insufficient conversion, and the by-products of lignin thermal conversion have not been well utilized and other problems, the present invention can obtain monophenolic compounds with high yield, and at the same time co-produce activated carbon with high specific surface area, which simplifies the process and promotes the resource conversion and multi-level utilization of lignin

Method used

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  • Co-production method of monophenol compound and activated carbon by lignin catalytic pyrolysis
  • Co-production method of monophenol compound and activated carbon by lignin catalytic pyrolysis
  • Co-production method of monophenol compound and activated carbon by lignin catalytic pyrolysis

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Embodiment 1

[0043] Taking the lignosulfonate raw material as an example to introduce the implementation process of the present invention is as follows:

[0044] Soak lignosulfonate in 0.1mol / L CuCl 2 5 hours in solution, lignosulfonate and anhydrous CuCl 2 The mass ratio is 1:0.01, and then dried at 120°C for 8 hours to obtain the supported CuCl 2 Lignosulfonate; supported CuCl 2 Lignosulfonate soaked in 1mol / L ZnCl 2 10 hours in solution, loaded with CuCl 2 The mass ratio of lignosulfonate to anhydrous zinc chloride is 1:0.5, and then vacuum-dried at 60°C and hydrogen chloride protective gas for 5 hours, and after drying, thermal cracking reaction is carried out at 450°C and 0.5 second reaction time, Generate high-temperature pyrolytic carbon and pyrolysis steam; pyrolysis steam is condensed in two stages, the first stage is condensed at a condensation temperature of 5°C to obtain a first-stage phenolic liquid, and the second stage is electro-captured at a voltage of 10kV Condensate...

Embodiment 2

[0047] Taking the mixture of kraft lignin and hydrolyzed lignin as a raw material to introduce the implementation process of the present invention as follows:

[0048] Soak kraft lignin in 0.3mol / L FeCl 3 7 hours in solution, kraft lignin with anhydrous FeCl 3 The mass ratio was 1:0.05, and then dried at 125°C for 5 hours to obtain the loaded FeCl 3 Kraft lignin; loaded with FeCl 3 Kraft lignin soaked in 3mol / L ZnCl 2 20 hours in solution, loaded with FeCl 3 The mass ratio of kraft lignin to anhydrous zinc chloride is 1:1, and then vacuum-dried at 65°C and hydrogen chloride protective gas for 6 hours, and after drying, thermal cracking reaction is carried out at 500°C with a reaction time of 3 seconds to generate High-temperature pyrolytic carbon and pyrolysis steam; pyrolysis steam is condensed in two stages, the first stage is condensed at a condensation temperature of 2°C to obtain a phenolic liquid, and the second stage is condensed by electric capture at a voltage of ...

Embodiment 3

[0051] Taking the alkali lignin raw material as an example to introduce the implementation process of the present invention is as follows:

[0052] Soak the alkali lignin in NiCl with a concentration of 0.5mol / L 2 10 hours in solution, alkali lignin and anhydrous NiCl 2 The mass ratio is 1:0.1, and then dried at 130°C for 5 hours to obtain the loaded NiCl 2 Alkali lignin; loaded NiCl 2 Alkali lignin soaked in ZnCl with a concentration of 5mol / L 2 40 hours in solution, loaded with NiCl 2 The mass ratio of alkali lignin to anhydrous zinc chloride is 1:1.5, and then vacuum-dried at 70°C and hydrogen chloride protective gas for 5 hours. After drying, thermal cracking reaction is carried out at 650°C and 2.5 seconds reaction time to generate Pyrolytic carbon and pyrolysis steam; pyrolysis steam is condensed in two stages, the first stage is condensed at a condensation temperature of 0°C to obtain a phenolic liquid, and the second stage is condensed by electric capture at a volt...

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Abstract

The invention discloses a co-production method of monophenol compound and activated carbon by lignin catalytic pyrolysis, and belongs to the technical field of biomass energy sources. For the problems that in current lignin thermal transition research, a process is harsh and complex, transition is insufficient, lignin thermal transition by-products are not well utilized, and the like, the method can be used to obtain the monophenol compound with high yield and meanwhile co-produce the activated carbon with high specific surface area, the process is simplified, and recycling transformation and multistage utilization of lignin are facilitated.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, and in particular relates to a method for co-producing monophenolic compounds and activated carbon by catalytic pyrolysis of lignin. Background technique [0002] Lignin is one of the important components of biomass, and it is a renewable carbon source second only to cellulose in abundance on earth. At present, the source of lignin is mainly industrial lignin, which is a by-product of the pulp and paper industry. According to different pulp preparation processes, industrial lignin can be divided into lignosulfonate, alkali lignin, dealkalized lignin, and organic solvent lignin. Su and so on. The annual amount of lignin from the paper industry in the world is more than 50 million tons, and only a small part of it is effectively used. Therefore, it is more and more important to develop efficient utilization methods of lignin and promote the high-value conversion of lignin. [0003] There a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/336C01B32/348C07C37/54C07C39/02C07C39/00
CPCC01P2006/12C07C37/54C07C39/02C07C39/00
Inventor 王文亮李新平韩卿薛白亮侯青青
Owner SHAANXI UNIV OF SCI & TECH
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