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Method for preparing phenolic compound through bagasse lignin

A technology of phenolic compounds and lignin, which is applied in the field of high-efficiency catalytic conversion of lignin and resource utilization, can solve the problems of low lignin utilization efficiency, emission or burning of the environment, and avoid environmental pollution and resource waste, improve Effect of high-value utilization and high catalytic conversion activity

Active Publication Date: 2016-06-08
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing phenolic compounds from bagasse lignin, which is used to solve the problems of low lignin utilization efficiency, discharge or burnt pollution of the environment

Method used

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  • Method for preparing phenolic compound through bagasse lignin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 6.9304gLa(NO 3 ) 3 ·6H 2 O, 0.8492gSr(NO 3 ) 2 , 8.0827gFe(NO 3 ) 3 9H 2 O. Dissolve in 300mL distilled water in turn, add a certain amount of NH 3 ·H 2 O adjust the pH of the solution to 10, add 0.06g cetyltrimethylammonium bromide, transfer the solution to a 500mL polytetrafluoroethylene-lined reactor, place the kettle to crystallize in an oven, and the crystallization temperature is The crystallization time at 180°C is 18hr. After the sample was cooled to room temperature, it was transferred to a beaker, and the upper liquid was transferred to a centrifuge tube for centrifugation at a speed of 8000r / min for 5 minutes, washed with distilled water for 3 times, dried at 120°C for 8hrs, and roasted at 800°C for 5hrs to obtain La 0.8 Sr 0.2 FeO 3 solid.

[0023] Weigh 2.5g bagasse lignin and 2.5gLa 0.8 Sr 0.2 FeO 3 After fully mixing, use a powder tablet press to compress the tablets at a pressure of 20 MPa for 10 minutes to obtain a tablet mixture, w...

Embodiment 2

[0026] Weigh 4.7230gCa(NO 3 ) 2 ·6H 2 O, 6.8691gZr(NO 3 ) 4 ·5H 2 O, 1.6160gFe(NO 3 ) 3 9H 2 O was dissolved in 300mL distilled water in turn, and a certain amount of NH 3 ·H 2 O adjust the pH of the solution to 10.5, add 0.03g cetyltrimethylammonium bromide, transfer the solution to a 500mL polytetrafluoroethylene-lined reaction kettle, place the still in an oven for crystallization, and the crystallization temperature is The crystallization time at 180°C is 18hr. After the sample is cooled to room temperature, it is transferred to a beaker, and the upper layer liquid is transferred to a centrifuge tube for centrifugation at a speed of 6000r / min for 8 minutes, washed 3 times with distilled water, dried at 120°C for 8hrs, and roasted at 800°C for 5hrs to obtain CaZr 0.8 Fe 0.2 o 3 Solid, its scanning electron microscope picture is as follows figure 1 .

[0027] Weigh 2.5g bagasse lignin and 2.5gCaZr 0.8 Fe 0.2 o 3 After fully mixing, use a powder tablet press ...

Embodiment 3

[0030] Weigh 4.3300gLa(NO 3 ) 3 ·6H 2 O, 2.1163gSr(NO 3 ) 2 , 8.0800gFe(NO 3 ) 3 9H 2 O was dissolved in 300mL distilled water in turn, and a certain amount of NH 3 ·H 2 O adjust the pH of the solution to 8, add 0.09g cetyltrimethylammonium bromide, transfer the solution to the reaction kettle of the 500mL polytetrafluoroethylene liner, place the still in an oven for crystallization, and the crystallization temperature is The crystallization time at 250°C is 12hr. After the sample was cooled to room temperature, it was transferred to a beaker, and the upper liquid was transferred to a centrifuge tube for centrifugation at a speed of 12000r / min for 5min, washed with distilled water for 3 times, dried at 120°C for 8hr, and roasted at 800°C for 6hr to obtain La 0.5 Sr 0.5 FeO 3 solid.

[0031] Weigh 0.4g bagasse lignin and 4.0gLa 0.5 Sr 0.5 FeO 3 After fully mixing, use a powder tablet press to compress tablets at a pressure of 10 MPa for 30 minutes to obtain a tab...

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Abstract

The invention relates to a method for preparing a phenolic compound through bagasse lignin. The method for preparing the phenolic compound through bagasse lignin comprises the steps that the bagasse lignin and a nano micro-size perovskite type catalyst are sufficiently mixed, pressed into pieces to be formed and pulverized into particles, wherein the mass ratio of the bagasse lignin to the catalyst is 0.1: 1-5: 1, and catalytic conversion is conducted through the bagasse lignin under the conditions that the reaction temperature is 300-700 DEG C and the reaction time is 1-3 hours, so that a liquid product containing the phenolic compound is obtained. The catalyst is LaxSr1-xFeO3 or CaZrxFe1-xO3, wherein x is less than or equal to 0 and greater than or equal to 1, and the catalyst is nano micro-size perovskite type metal oxide which is prepared through hydro-thermal synthesis. The nano micro-size perovskite type catalyst prepared through a hydro-thermal synthesis method has high catalytic conversion activity for bagasse lignin, and selectivity of the phenolic compound is greater than 60%.

Description

technical field [0001] The invention relates to the field of high-efficiency catalytic conversion and resource utilization of lignin, in particular to a method for preparing phenolic compounds from bagasse lignin. Background technique [0002] In nature, lignin is the second largest biomass besides cellulose, and according to statistics, the annual regeneration of lignin can reach 5.0×10 10 Ton. The sugarcane waste residue produced in the sugar industry contains a large amount of lignin. Because of its molecular structure with oxygen-containing functional groups such as phenolic hydroxyl, aldehyde, and carboxyl, it has become a degradable biomass resource with potential application value. The conversion of bagasse lignin to produce phenolic compounds is of great significance for the realization of high value and resource utilization of bagasse lignin. [0003] At present, the conversion and utilization of lignin are mostly concentrated in the fields of biochemistry and cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/54B01J23/83B01J23/78
CPCY02P20/52C07C37/54B01J23/002B01J23/78B01J23/83B01J2523/00B01J2523/24B01J2523/3706B01J2523/842B01J2523/23B01J2523/48
Inventor 韩洪晶陈彦广宋华王海英闫伟宁张雷
Owner NORTHEAST GASOLINEEUM UNIV
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