Check patentability & draft patents in minutes with Patsnap Eureka AI!

Catalyst for ethanol dehydrogenation to ethyl acetate and co-production of acetaldehyde, preparation method and application thereof

An ethyl acetate and catalyst technology, which is applied in the field of ethanol dehydrogenation to ethyl acetate and acetaldehyde production, can solve problems such as toxicity and toxic ethanol conversion rate, and achieve the advantages of increasing economy, reducing market risks and green reaction process. Effect

Active Publication Date: 2021-07-27
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2001, Davy Company carried out the reaction of ethanol dehydrogenation to ethyl acetate on a copper-chromium catalyst. At 220°C and 3.0 MPa, the selectivity of ethyl acetate was about 94%, but the conversion rate of ethanol was only about 27%. Toxic Chromium Catalyst
[0005] Although the above-mentioned catalysts all realize the dehydrogenation of ethanol to ethyl acetate, the catalysts used are either poisonous or have a low conversion rate of ethanol

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1.45 g Cu(NO 3 ) 2 .3H 2 O, 61.54 g Mg(NO 3 ) 2 .6H 2 O, 12.53 g Al(NO 3 ) 3 .9H 2 O and 3.51 gNa 3 AlF 6 Dissolved in 500 ml deionized water to obtain a total concentration of metal ions of 0.60 mol / L, F - A metal salt solution with an ion concentration of 0.19mol / L. 24.00 g NaOH and 16.00 g Na 2 CO 3 Dissolve in 600.00 ml deionized water to give OH - The ion concentration is 1.00 mol / L, CO 3 2- Alkaline solution with an ion concentration of 0.25 mol / L

[0026] The metal salt solution and alkali solution obtained above were co-precipitated at 40 °C with a pH value of 10.6 for 40 min, and then dynamically aged at 80 °C for 10 h after the precipitation was completed. After aging, it was washed with water, dried at 100°C for 12 hours, and calcined at 450°C for 6 hours to obtain a molar composition of Cu:Mg:Al=2.0:80.0:16.7, F / Al 3+ =2.0 catalyst.

[0027] The catalyst obtained above is applied to a fixed-bed tubular reactor, and the catalyst is heated in...

Embodiment 2

[0029] 7.25 g Cu(NO 3 ) 2 .3H 2 O, 56.15 g Mg(NO 3 ) 2 .6H 2 O, 24.38 g Al(NO 3 ) 3 .9H 2 O and 2.10 gNa 3 AlF 6 Dissolved in 300 ml deionized water to obtain a total concentration of metal ions of 1.00 mol / L, F - A metal salt solution with an ion concentration of 0.20 mol / L. 24.00 g NaOH and 16.00 g Na 2 CO 3 Dissolve in 400.00 ml deionized water to give OH - The ion concentration is 1.50 mol / L, CO 3 2- Alkaline solution with an ion concentration of 0.38 mol / L

[0030] The metal salt solution and alkali solution obtained above were co-precipitated at 50 °C with a pH value of 11.0 for 30 min, and then dynamically aged at 90 °C for 6 h after the precipitation was completed. After aging, it was washed with water, dried at 100°C for 12 h, and calcined at 550°C for 4 h to obtain a molar composition of Cu:Mg:Al=10.0:73.0:25.0, F / Al 3+ =0.8 catalyst.

[0031] The catalyst obtained above is applied to a fixed-bed tubular reactor, and the catalyst is heated in H befo...

Embodiment 3

[0033] 3.62 g Cu(NO 3 ) 2 .3H 2 O, 57.69 g Mg(NO 3 ) 2 .6H 2 O, 18.76 g Al(NO 3 ) 3 .9H 2 O and 2.10 gNa 3 AlF 6 Dissolved in 200 ml deionized water to obtain a total concentration of metal ions of 1.50 mol / L, F - A metal salt solution with an ion concentration of 0.30mol / L. 35.00 g KOH and 20.00 g K 2 CO 3 Dissolve in 300.00 ml deionized water to give OH - The ion concentration is 2.08 mol / L, CO 3 2- Alkaline solution with an ion concentration of 0.60 mol / L

[0034] The metal salt solution and alkali solution obtained above were co-precipitated at 60 °C with a pH value of 11.5 for 20 min, and then dynamically aged at 85 °C for 10 h after the precipitation was completed. After aging, it was washed with water, dried at 100°C for 12 hours, and calcined at 600°C for 4 hours to obtain a molar composition of Cu:Mg:Al=5.0:75.0:20.0, F / Al 3+ =1.0 catalyst.

[0035] The catalyst obtained above is applied to a fixed-bed tubular reactor, and the catalyst is heated in H...

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

No PUM Login to View More

Abstract

The invention relates to the field of ethanol dehydrogenation to produce ethyl acetate and co-produce acetaldehyde. A catalyst for dehydrogenating ethanol to produce ethyl acetate and co-producing acetaldehyde. It is composed of copper Cu, metal M, aluminum Al and fluorine F. Calculating the mole fraction of the catalyst composition, copper Cu accounts for 1 to 10 parts, and metal M accounts for 1 to 10 parts. 74 to 83.3 parts, aluminum accounts for 16.7 to 25.0, and fluorine F accounts for 8.35 to 50.0. The invention also relates to the preparation method and application of the catalyst. The catalyst of the invention is cheap, has a simple preparation method and is easy to operate.

Description

technical field [0001] The invention relates to the field of ethanol dehydrogenation to ethyl acetate and co-production of acetaldehyde. Background technique [0002] Ethyl acetate is an important green organic solvent, which is mainly used as an active solvent in the formulation of coatings (paints and enamel), inks and adhesives, and also as a process solvent for pharmaceutical and organic chemical synthesis. Ethyl acetate is a national major basic bulk fine chemical product. According to incomplete statistics, it accounts for about 10% of the total amount of major basic bulk fine chemical products. [0003] The traditional production process of ethyl acetate is the esterification of ethanol and acetic acid. This process uses sulfuric acid as a catalyst, which has problems such as serious equipment corrosion, difficult separation of catalyst and product, large amount of waste water, and high maintenance costs. Therefore, it is of great significance to develop new green et...

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 Patents(China)
IPC IPC(8): B01J27/138B01J37/03C07C45/00C07C47/06C07C67/40C07C69/14C07C27/00
CPCB01J27/138B01J37/03C07C45/002C07C67/40C07C69/14C07C47/06
Inventor 李德宝郭荷芹侯博贾丽涛陈从标肖勇
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com