Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Technology for preparing 2-ethylanthraquinone

A technology for producing ethylanthraquinone and a production process, which is applied in the field of production process for 2-ethylanthraquinone, can solve problems such as inability to realize large-scale industrial production, difficult sources of raw materials, cumbersome synthesis steps, etc., achieve low cost and increase production efficiency, easy preparation

Inactive Publication Date: 2018-03-02
QINZHOU UNIV
View PDF4 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot achieve large-scale industrial production due to cumbersome synthesis steps and difficult sources of raw materials.

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
  • Technology for preparing 2-ethylanthraquinone
  • Technology for preparing 2-ethylanthraquinone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1. Preparation of 2-ethylanthracene:

[0037] Mix the raw material MWW structure molecular sieve, transition metal salt solution, tetramethylammonium hydroxide, pentamethyleneimine, and deionized water uniformly to obtain the ratio of the amount of substances as H 2 0 / Si0 2 = 5, R1 / Si0 2 = 0.015, R2 / Si0 2 =0.5, and the mixture was crystallized at 180°C for 5h and recovered. The prepared catalyst was contacted and reacted with anthracene and ethylene at a temperature of 180°C and a pressure of 1MPa to obtain 2-ethyl Anthracene

[0038] Step 2. Preparation of 2-ethylanthraquinone. The Y-type molecular sieve catalyst is treated in glycerol at 150°C for 5 hours, and then mixed with the resulting mixture, inorganic directing agent, and transition metal salt solution at 80°C for 2 hours, and then placed in a closed reactor Treated at 120°C for 20h, take out the product under normal temperature and pressure, dry and roast to obtain mesoporous Y-type molecular sieve with a pore...

Embodiment 2

[0040] Step 1. Preparation of 2-ethylanthracene. A conventional MWW structure catalyst is reacted with anthracene and ethylene at a temperature of 180°C and a pressure of 1MPa to obtain 2-ethylanthracene;

[0041] Step 2. Preparation of 2-ethylanthraquinone. The Y-type molecular sieve catalyst is treated in glycerol at 150°C for 5 hours, and then mixed with the resulting mixture, inorganic directing agent, and transition metal salt solution at 80°C for 2 hours, and then placed in a closed reactor Treated at 120℃ for 20h, take out the product under normal temperature and pressure, dry and calcined to obtain mesoporous Y molecular sieve with pore diameter centered on 5-7nm; the mass mixing ratio of Y molecular sieve and glycerol is 1:5, Y molecular sieve and inorganic The mass mixing ratio of the directing agent is 1:0.5. Under the conditions of a temperature of 180°C and a pressure of 1 MPa, 2-ethylanthracene and hydrogen peroxide are contacted and reacted with the prepared catalys...

Embodiment 3

[0043] Step 1. Preparation of 2-ethylanthracene. The raw material MWW structure molecular sieve, transition metal salt solution, nitrogen-containing organic base Rl, organic amine R2, and deionized water are mixed uniformly to obtain the ratio of the amount of substance to H 2 0 / Si0 2 = 5, R1 / Si0 2 = 0.015, R 2 / Si0 2 =0.5, and the mixture was crystallized at 180°C for 5h and recovered. The prepared catalyst was contacted and reacted with anthracene and ethylene at a temperature of 180°C and a pressure of 1MPa to obtain 2-ethyl Anthracene

[0044] Step 2. Preparation of 2-ethylanthraquinone. At a temperature of 180°C and a pressure of 1MPa, 2-ethylanthracene and hydrogen peroxide are contacted and reacted with a conventional mesoporous Y-type molecular sieve catalyst to obtain 2- Ethyl anthraquinone.

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
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a technology for preparing 2-ethylanthraquinone from anthracene and ethylene. The technology comprises the following steps: alkylating anthracene and ethylene by using a transition metal oxide supported MWW type molecular sieve catalyst to prepare 2-ethylanthracence; and oxidizing the 2-ethylanthracence by using a molybdena supported Y type molecular sieve catalyst to prepare the 2-ethylanthraquinone. The technology has the advantages of facilitation of the proceeding of the reactions, low cost and high yield.

Description

Technical field [0001] The invention belongs to the technical field of chemical processes, and specifically relates to a production process of 2-ethylanthraquinone. Background technique [0002] At present, the production of 2-ethylanthraquinone mainly has the following three methods: 2-ethylanthracene direct oxidation method, 2-formylanthraquinone conversion method and phthalic anhydride method. [0003] Ethylanthracene direct oxidation method. The biggest advantage of this process is that there is no "three wastes". The main disadvantage is that the source of the raw material 2-ethylanthracene is limited. There is very little 2-ethylanthracene in nature, but 2-ethylanthracene used for production is converted from 2-ethylanthraquinone. Therefore, the reaction can only be extracted from coal tar, and coal tar contains other The content is also very low, and the separation process is very complicated, which requires high engineering equipment and manual operation. The price of the...

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): C07C46/04C07C50/16
CPCC07C2/66C07C46/04C07C2529/72C07C50/16C07C15/28
Inventor 王伟建李红昕刘子杰蔡成翔石海信罗祥生晁会霞张海燕韦金广何坤欢贾贞健
Owner QINZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com