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

Method for preparation of methyl formate

A technology for methyl formate and methanol, applied in the field of preparing methyl formate, can solve the problems of difficulty in obtaining high yield, decreased selectivity of methyl formate, etc., and achieves cheap raw materials, high yield of methyl formate, and adjustable wide range of effects

Active Publication Date: 2014-09-03
PEKING UNIV
View PDF10 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the side reaction of formaldehyde over-oxidation, in the one-step preparation of methyl formate using bifunctional catalysts, the selectivity of methyl formate usually decreases sharply when the conversion rate is increased, and the over-oxidation product CO 2 increase, so it is difficult to obtain a high yield

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 preparation of methyl formate
  • Method for preparation of methyl formate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] 1) Prepare formaldehyde gas according to method one:

[0062] Paraformaldehyde (Sinopharm Chemical Reagent Beijing Co., Ltd.) was decomposed at 90° C., and the formaldehyde gas produced by the decomposition was mixed with N2 to obtain a mixed gas composed of formaldehyde and nitrogen with a molar concentration of formaldehyde of 4%.

[0063] 2) Place catalyst B industrial ZrO in reactor B 2 , feed a mixture of formaldehyde and nitrogen with a formaldehyde content of 4% to carry out the Tishchenko reaction, the temperature is 120 ° C, catalyst B is diluted with quartz sand to eliminate the thermal effect of the exothermic reaction, and the reaction gas flow rate is 30ml / min. In order to avoid product condensation, all pipelines connecting the reactor and the chromatograph are kept above 120°C.

[0064] The conversion rate of formaldehyde was 98%, the selectivity of methyl formate was 96%, the yield of methyl formate was 95%, and the yield of methyl formate remained stab...

Embodiment 2

[0066] 1) Prepare formaldehyde gas according to method two:

[0067] Use attached figure 1 of the reactor.

[0068] The reaction raw material gas is a mixed gas composed of methanol and air with a methanol molar concentration of 4%, and the reaction raw material gas is figure 1 Selective oxidation reaction is carried out in the reactor A (reaction tube inner diameter is 14mm) in the reactor A, and catalyst A is industrial iron-molybdenum composite metal oxide catalyst (with Mo and Fe mol ratio being 2.8 with ammonium molybdate and iron nitrate) : 1 After co-precipitation, the precipitate is collected and roasted in the air at 500°C), and the catalyst A is diluted with quartz sand to eliminate the thermal effect of the exothermic reaction, the reaction temperature T1 is 320°C, and the resulting formaldehyde gas is passed into the reactor B for follow-up response;

[0069] 2) Place catalyst B industrial ZrO in reactor B 2 , the formaldehyde produced by passing into reactor A...

Embodiment 3

[0072] 1) prepare formaldehyde gas according to the method of embodiment 1 step 1);

[0073] 2) Place catalyst B industrial ZrO2 in reactor B, and dilute catalyst B with quartz sand to eliminate the thermal effect of exothermic reaction, pass into formaldehyde to carry out Tishchenko reaction, in order to test the stability of catalyst under more severe reaction conditions, reduce the amount of catalyst , and the reaction temperature was increased to 150° C., and the reaction gas flow rate was 50 ml / min. In order to avoid product condensation, all pipelines connecting the reactor and the chromatograph are kept above 120°C.

[0074] The conversion rate of methanol was 93%, the selectivity of methyl formate was 96%, and the yield of methyl formate was 88%. Under the reaction conditions, the reaction activity did not decrease significantly after 80 hours, indicating that the catalyst had good stability.

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 discloses a method for preparation of methyl formate. The method comprises the following steps: conducting a Tishchenko reaction on formaldehyde gas or mixed gas containing formaldehyde gas in a reactor to obtain the methyl formate after the reaction. The method can efficiently convert methanol or dimethyl ether for synthesis of methyl formate, and the yield of methyl formate can reach more than 90%. The method employs cheap catalyst and simple equipment, can be applied to the current common industrial production conditions, and has good application prospect.

Description

technical field [0001] The present invention relates to a kind of method of preparing methyl formate. Background technique [0002] Methyl Formate (MF for short), also known as methyl formate, is a colorless, aromatic liquid with a melting point of -99°C, a boiling point of 32°C, and a relative density of 0.98. It is soluble in water, ethanol, and methanol. , ether, etc. Methyl formate has dual reactivity of aldehyde and ester, is an important chemical intermediate, can be used for hydrolysis to prepare formic acid, isomerization to prepare acetic acid, aminolysis to synthesize formamide or react with dimethylamine to prepare dimethylformamide ( DMF), and coupling with formaldehyde to synthesize ethylene glycol, etc. [0003] Taking methanol as a raw material, the traditional methods for synthesizing methyl formate are as follows: [0004] (1) direct esterification method, methyl alcohol and formic acid carry out esterification reaction and obtain methyl formate: [0005...

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
IPC IPC(8): C07C69/06C07C67/44
CPCC07C67/44C07C69/06
Inventor 刘海超陈文龙
Owner PEKING 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