Method for preparing polyoxymethylene dimethyl ether carboxylate and methyl methoxy acetate
A technology of polyoxymethylene dimethyl ether and carbonylate, applied in the field of polyoxymethylene dimethyl ether carbonylate, which can solve the problem of short catalyst life, low concentration of methylal, and conversion rate of methylal to methyl methoxyacetate The ester selectivity is not ideal enough to achieve the effect of long catalyst life, high selectivity and high conversion rate
Active Publication Date: 2015-06-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF5 Cites 21 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the catalyst life is short, the concentration of methylal in the feed gas is low, the conversion rate of methylal and the selectivity of methyl methoxyacetate are not ideal enough, and there is still a considerable distance from industrialization [Angew.Chem.Iht.Ed., 2009, 48, 4813-4815; J.Catal., 2010, 270, 185-195; J.Catal., 2010, 274, 150-162; WO2010 / 048300A1]
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0053] 50 g of MCM-22 molecular sieves with a sodium-type silicon-aluminum ratio of 40:1 were converted into acidic molecular sieves using standard operating procedures, which were recorded as catalyst A, as shown in Table 1.
Embodiment 2
[0055] 100 g of MCM-22 molecular sieve with a sodium-type silicon-aluminum ratio of 40:1 was treated with steam at 550°C for 4 hours, and then converted into an acidic molecular sieve using standard operating procedures, which was designated as catalyst B, see Table 1.
Embodiment 3
[0057] Treat 100g of MCM-22 molecular sieve with a sodium-type silicon-alumina ratio of 40:1 in 500ml of 0.1mol / L hydrochloric acid solution at 60°C for 1 hour, and then convert it into an acidic molecular sieve using standard operating procedures, which is recorded as catalyst C, see 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
Login to view more Abstract
The invention provides a method for preparing polyoxymethylene dimethyl ether carboxylate and / or methyl methoxy acetate which serves as an intermediate for producing ethylene glycol. The method comprises the step of enabling a raw material, namely polyoxymethylene dimethyl ether or methylal, together with carbon monoxide and hydrogen gas to react in a dealuminzation modified acidic molecular sieve catalyst loaded reactor under appropriate reaction conditions without adding other solvents, so as to prepare corresponding products, wherein a reaction process is of gas-liquid-solid three-phase reaction. According to the method provided by the invention, the conversion ratio of the raw material polyoxymethylene dimethyl ether or methylal is high, the selectivity of each product is high, the service life of a catalyst is long, external solvents are not required to be used, reaction conditions are relatively mild, and continuous production can be carried out, so that the method has industrial application potential. Furthermore, the obtained products can be used for producing ethylene glycol through hydrolyzing after hydrogenating or hydrogenating after hydrolyzing.
Description
technical field [0001] The invention relates to a method for preparing polymethoxy dimethyl ether carbonylate and methyl methoxyacetate as intermediates for producing ethylene glycol. Background technique [0002] Ethylene glycol is an important chemical raw material and strategic material in the country. It is used in the manufacture of polyester (which can further produce polyester, PET bottles, films), explosives, glyoxal, and can be used as antifreeze, plasticizer, hydraulic fluid and solvent Wait. In 2009, China's ethylene glycol imports exceeded 5.8 million tons. It is estimated that my country's ethylene glycol demand will reach 11.2 million tons in 2015, with a production capacity of about 5 million tons, and a supply-demand gap of 6.2 million tons. Therefore, my country's ethylene glycol production The development and application of new technologies has a good market prospect. Internationally, ethylene oxide from petroleum cracking is mainly oxidized to obtain ethy...
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
Login to view more Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/708C07C67/37C07C31/20C07C29/10
CPCY02P20/52C07C67/37C07C29/10C07C29/149C07C41/01C07C31/202C07C43/135C07C43/132C07C69/708
Inventor 倪友明朱文良刘勇刘红超刘中民孟霜鹤李利娜刘世平周慧
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
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