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A method for preparing aromatic compounds from lignin

A technology of aromatic compounds and lignin, which is applied in the field of preparation of aromatic compounds from lignin, can solve problems such as harsh conditions, and achieve good performance and high selectivity

Active Publication Date: 2022-01-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the BCD process usually uses a metered amount of alkali, the conditions are harsh, and the pyrolysis temperature is between 270°C and 330°C, accompanied by relatively high pressure.

Method used

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  • A method for preparing aromatic compounds from lignin
  • A method for preparing aromatic compounds from lignin
  • A method for preparing aromatic compounds from lignin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 Preparation of nitrogen-containing porous organic polymer A

[0049] 1 g of p-osne dystenentonile and 1 g of zinc chloride were added to high temperature quartz pipes, and the vacuum seal was placed in a muffle in the muffle, the reaction temperature was 400 ° C, the reaction time was 40 h, and the solid obtained after natural cooling Dilute hydrochloric acid washing zinc chloride, and then placed at a vacuum oven at 80 ° C for 12 h to obtain a nitrogen-containing porous organic polymer A.

Embodiment 2

[0050] Example 2 Preparation of nitrogen-containing porous organic polymer B

[0051] 0.7 g of 2,5-dicyanosylbenzene and 0.7 g of zinc chloride were added to high temperature quartz tube, and the vacuum seal was added to the muffle furnace reaction, the reaction temperature was 400 ° C, the reaction time was 40 h, The resulting solids obtained after natural cooling was washed with zinc chloride, then placed at a vacuum oven at 80 ° C for 12 h to obtain a nitrogen-containing porous organic polymer B.

Embodiment 3

[0052] Example 3 Preparation of nitrogen-containing porous organic polymer C

[0053] In the high-temperature quartz tube, 1.0 g of phytonon nitrile and 1 g of zinc chloride were added. After the vacuum seal, the reaction temperature was placed in a muffle, the reaction temperature was 400 ° C, the reaction time was 40 h, and after natural cooling The solid was washed with zinc chloride by dilute hydrochloric acid, and then placed at a vacuum oven at 80 ° C for 12 h to obtain a nitrogen-containing porous organic polymer C.

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Abstract

The present application discloses a method for preparing aromatic compounds from lignin. The method at least includes: in an oxygen atmosphere, contacting a raw material containing lignin with a solid base catalyst to obtain an aromatic compound; the solid base catalyst includes a nitrogen-containing porous organic polymer and an alkali metal oxide supported on a nitrogen-containing porous organic polymer. The method for preparing aromatic compounds from lignin provided by this application can crack lignin with high selectivity to obtain aromatic compounds under mild conditions. The solid base catalyst used in the reaction is fully in contact with the raw materials, so that the reaction time period, conversion rate and selection Sex is higher.

Description

Technical field [0001] The present application relates to a method of preparing aromatic compounds for lignin, belonging to the technical chemical technology. Background technique [0002] Aromatic compound is an important type of chemical chemical raw material, widely used in pharmaceutical, polyester, plastic, cosmetics and other industries, and traditional synthetic routes are derived from petrochemicals. Lignin as an important part of renewable biomass lignocellulose, accounting for 15-30% by weight of its total. Considering that the lignin has a unique aromatic structure, an effective transformed lignin to an aromatic compound can prepare high value-added chemicals. However, lignin is an unsettled height cross-linking macromolecule, mainly with CC bonds and CO keys by complex connection such as β-O-4, β-5, β-β, β-1, α-O-4. Connect, these complex connections cause its key to break. The catalytic system for carrying out efficient catalytic cleavage is a necessary direction. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C27/00C07C37/52C07C39/04C07C51/255C07C63/06C07C67/00C07C69/78C07C69/738B01J27/24B01J31/06B01J35/10B01J37/08
CPCC07C37/52C07C51/255C07C67/00B01J27/24B01J37/088B01J37/082B01J31/06B01J35/643C07C39/04C07C63/06C07C69/78C07C69/738Y02P20/52
Inventor 徐杰朱国志石松高进杜文强赵丽
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI