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

Synthesis method of dimethyl malonate

A technology of dimethyl malonate and a synthesis method is applied in chemical instruments and methods, carbon monoxide or formate reaction preparation, organic compound/hydride/coordination complex catalyst, etc., and can solve high cost and environmental pollution. , complex process and other problems, to achieve the effect of changing performance

Pending Publication Date: 2021-01-19
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the problem of high cost, complex process and environmental pollution in the prior art; a new synthetic method of dimethyl malonate is provided, which uses methylal as raw material, and undergoes liquid phase One-step carbonylation to obtain dimethyl malonate, which has the advantages of easy-to-obtain raw materials, non-toxic and harmless, and environmental protection

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
  • Synthesis method of dimethyl malonate
  • Synthesis method of dimethyl malonate
  • Synthesis method of dimethyl malonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 3.14mmol cobalt carbonyl and 3.14mmol ligand (R is phenyl) in 314mmol sulfolane, transfer to a 100mL reactor, purging the reactor three times with nitrogen, add 31.4mmol methylal, and introduce carbon monoxide to make the system pressure It was 10.0MPa, and reacted at 120°C for 12 hours. After the reaction was completed, the reactor body was fully cooled to 0°C, and the pressure was slowly released to normal pressure. The reactor was purged three times with nitrogen, and samples were taken for analysis. The experimental results are shown in Table 1.

Embodiment 2

[0030] Dissolve 4mmol cobalt carbonyl and 4mmol ligand (R is phenyl) in 314mmol sulfolane, transfer to a 100mL reaction kettle, purge the reaction kettle three times with nitrogen, add 31.4mmol methylal, and pass in carbon monoxide to make the system pressure 10.0 MPa, react at 120°C for 12 hours. After the reaction was completed, the reactor body was fully cooled to 0°C, and the pressure was slowly released to normal pressure. The reactor was purged three times with nitrogen, and samples were taken for analysis. The experimental results are shown in Table 1.

Embodiment 3

[0032] Dissolve 6.28mmol cobalt carbonyl and 6.28mmol ligand (R is phenyl) in 314mmol sulfolane, transfer to a 100mL reactor, purging the reactor three times with nitrogen, add 31.4mmol methylal, and introduce carbon monoxide to make the system pressure It was 10.0MPa, and reacted at 120°C for 12 hours. After the reaction was completed, the reactor body was fully cooled to 0°C, and the pressure was slowly released to normal pressure. The reactor was purged three times with nitrogen, and samples were taken for analysis. The experimental results are shown in Table 1.

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 a synthesis method of dimethyl malonate, provides a novel carbonylation reaction synthesis route, and solves the problems of high cost, complex process and environmental pollution in the prior art. According to the technical scheme, the synthesis method of dimethyl malonate comprises the following steps: reacting cobalt carbonyl with a ligand to obtain a complex catalyst;and then adding methylal and carbon monoxide to react to obtain dimethyl malonate, wherein the ligand is a hexadentate chelated nitrogen ligand, and R is selected from n-octyl, phenyl, 4-methylphenylor phenoxy methyl. Therefore, the technical problem is well solved, and the method can be used for industrial production of dimethyl malonate.

Description

technical field [0001] The present invention relates to a kind of synthetic method of dimethyl malonate, specifically, relate to a kind of method that takes methylal and carbon monoxide as raw material to prepare dimethyl malonate. Background technique [0002] 1,3-Propanediol is an important organic fine chemical, which can be used as a raw material for the production of antifreeze, plasticizer, preservative and emulsifier, and is also widely used in industries such as food, cosmetics and pharmaceuticals. Its most important The application is to synthesize polytrimethylene terephthalate (PTT) polyester fiber as a monomer. Compared with the commonly used polyethylene terephthalate (PET) fiber, PTT fiber has light resistance, less water absorption, and stable It has excellent properties such as good resistance, and at the same time has the advantages of good resilience, easy biodegradation and little environmental pollution. It has a wide range of application prospects and is...

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): C07C67/37C07C69/38B01J31/22
CPCC07C67/37B01J31/1815B01J2531/0238B01J2531/845C07C69/38
Inventor 刘波吕建刚金照生王迪孙兰萍黄祖娟周海春
Owner CHINA PETROLEUM & CHEM CORP
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