Method for preparing phenol compound

A technology for phenolic compounds and catalysts is applied in the field of preparing phenolic compounds, which can solve the problems of reducing the selectivity and difficulty of phenolic compounds, and achieve the effects of high efficiency, simple preparation and high reaction conversion rate.

Active Publication Date: 2017-03-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation of phenolic compounds by the lignin route reduces the dependence on petrochemical phenols, there are still some difficulties
Lignin depolymerization is usually achieved by hydrogenation route, which easily causes excessive hydrogenation of benzene ring and reduces the selectivity of phenolic compounds

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing phenol compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 200g of ammonium cerium nitrate and bake it at 500°C for 5h under air atmosphere to obtain cerium dioxide. Fill the 14-25 mesh catalyst with cerium oxide forming sieve into a reaction tube with an inner diameter of 7mm, fill it with a 15cm bed, and under normal pressure, prepare the reaction solution of acetic acid, formaldehyde and ethanol according to the molar ratio of 1:5:1. Raw materials, the feed rate is 0.03mL·min -1 , nitrogen as the carrier gas, the flow rate is 30mL·min -1 , reacted at 350°C for 12h, and separated the liquid after the reaction, and the oil phase and water phase obtained were analyzed by chromatography respectively. The conversion of acetic acid was 70% and the overall selectivity to phenolic compounds was 75%.

Embodiment 2

[0029] Weigh 200g of ammonium cerium nitrate and bake it at 500°C for 5h under air atmosphere to obtain cerium dioxide. Fill the 14-25 mesh catalyst of ceria forming sieve into a reaction tube with an inner diameter of 8 mm, fill it with a 25 cm bed, and under normal pressure, use the reaction solution prepared by acetic acid and formaldehyde according to the molar ratio of 1:5 as the raw material, and feed The speed is 0.03mL·min -1 , nitrogen as the carrier gas, the flow rate is 30mL·min -1 , reacted at 350°C for 12h, and separated the liquid after the reaction, and the oil phase and water phase obtained were analyzed by chromatography respectively. The conversion of acetic acid was 80%, and the overall selectivity to phenolic compounds was 73%.

Embodiment 3

[0031] Weigh 50g of cerium nitrate and dissolve it in 4L of water, use 25wt% ammonia water as a precipitating agent, adjust the pH of the system to 9, centrifuge the obtained precipitate, dry it, and roast it at 500°C for 3 hours to obtain cerium oxide. Fill the 14-25 mesh catalyst with cerium oxide forming sieve into a reaction tube with an inner diameter of 7mm, fill it with a 9cm bed, and under normal pressure, the reaction solution prepared by acetic acid, formaldehyde and methanol according to the molar ratio of 1:5:1 is Raw materials, the feed rate is 0.03mL·min -1 , nitrogen as the carrier gas, the flow rate is 30mL·min -1 , reacted at 350°C for 12h, and separated the liquid after the reaction, and the oil phase and water phase obtained were analyzed by chromatography respectively. The conversion of acetic acid was 100%, and the overall selectivity to phenolic compounds was 85%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
heightaaaaaaaaaa
Login to view more

Abstract

The invention relates to a method for preparing a phenol compound. According to the method, acetic acid and methanal, or acetic acid, methanal and methyl alcohol are adopted as reactants, and th phenol compound is prepared under the catalytic effect of cerium dioxide (CeO2). Reaction is conducted in a fixed bed reactor under normal pressure with the reaction temperature being 300-550 DEG C. According to the method, the reaction conversion percent is high, the maximum reaction conversion percent reaches 100%, and the overall selectivity of the phenol compound reaches 85%; and in addition, the CeO2 is selected as the catalyst which is low in cost, easy to prepare, high in efficiency and capable of being regenerated through calcination and carbon deposit removal, and the method has potential application prospects.

Description

technical field [0001] The invention relates to a method for preparing phenolic compounds, in particular to a method for catalytically preparing phenolic compounds by using acetic acid, formaldehyde and / or methanol as reactants. Background technique [0002] Phenolic compounds are an important class of organic chemical raw materials. Phenol is one of the important derivatives of propylene, mainly used in the production of phenolic resin, caprolactam, bisphenol A, adipic acid, aniline, alkylphenol, salicylic acid, etc.; methylphenol is mainly used in phenolic resin, electrical insulating paint, Dyes, surfactants and lubricant additives, etc. In addition, phenolic compounds play a major role in the life activities of the human body and plants, such as anti-oxidation and anti-virus. [0003] At present, the main sources of phenolic compounds are petrochemical crude oil and plants. Crude oil is distilled at atmospheric pressure to obtain light oil, which is hydrogenated, then...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/07C07C39/07
CPCY02P20/52C07C37/07C07C39/07
Inventor 王峰王业红徐杰张健张志鑫张晓辰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap