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

Catalyst for synthesizing methyl acetal and its preparation method and application

A catalyst, methylal technology, applied in the preparation of organic compounds, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve problems such as troublesome separation and purification, and achieve a simple preparation method, mild reaction conditions, and easy operation. Effect

Inactive Publication Date: 2009-12-09
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will bring some troubles to the separation and purification of the product

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

[0020] Add to 0.5mol / L Cu(NO 3 ) 2 Add 2.5 mol / L NaOH solution to the solution until the precipitation is complete, filter the solution, wash and dry the filter cake, and then calcinate at 300°C for 4 hours to obtain the carrier CuO. CuO powder was added to the 13.9% ammonium perrhenate solution for immersion for 15h. Then the catalyst was moved into an oven and dried at 90 °C for 30 h. Then the dried catalyst was pressed into tablets and ground, and granules of 20-40 mesh were taken and filled into a fixed-bed reactor. Under the protection of Ar, the temperature was raised to 300°C at a heating rate of 2°C / min, and after a constant temperature of 8 hours, When the temperature is lowered to 205°C, the reaction can be started by feeding the reaction gas. CH 3 OH%=4.0v%, GHSV=5.6×10 3 h -1 , The reactivity of the catalyst is shown in Table 2.

Embodiment 2

[0022] Add to 2.0mol / L Cu(NO 3 ) 2 Add 1.0 mol / L NaOH solution to the solution until the precipitation is complete, filter the solution, wash and dry the filter cake, and then calcinate at 360° C. for 3 h to obtain the carrier CuO. CuO powder was added to the 12.5% ​​ammonium perrhenate solution for immersion for 12h. Then the catalyst was moved into an oven and dried at 70 °C for 30 h. Then the dried catalyst was pressed into tablets and ground, and the particles of 20-40 mesh were taken and filled into a fixed-bed reactor. Under the protection of Ar, the temperature was raised to 400°C at a heating rate of 8°C / min, and after a constant temperature of 3 hours, When the temperature is lowered to 220°C, the reaction can be started by feeding the reaction gas. CH 3 OH%=5.0v%, GHSV=1.12×10 4 h -1 , The reactivity of the catalyst is shown in Table 2.

Embodiment 3

[0024] Add to 1.5mol / L Cu(NO 3 ) 2 Add 2.0 mol / L NaOH solution to the solution until the precipitation is complete, filter the solution, wash and dry the filter cake, and then calcinate at 400° C. for 2 h to obtain the carrier CuO. CuO powder was added to 15.2% ammonium perrhenate solution for immersion for 15h. Then the catalyst was moved into an oven and dried at 60 °C for 48 h. Then the dried catalyst was pressed into tablets and ground, and the particles of 20-40 mesh were taken and filled into a fixed-bed reactor. Under the protection of Ar, the temperature was raised to 360°C at a heating rate of 6°C / min. After constant temperature for 6 hours, down to 205°C, adjust methanol feed rate and Ar rate, CH 3 OH%=7.7v%, GHSV=1.68×10 4 h -1 , The reactivity of the catalyst is shown in Table 2.

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

A catalyst for synthesizing methylal is composed of ReOx and CuO, wherein the mass percentage of Re element on the catalyst is 5.56-10.5%. Add NaOH solution to the Cu(NO3)2 solution under stirring until the precipitation is complete, filter, and the filter cake is washed, dried and roasted to obtain the carrier CuO; the ammonium perrhenate is made into a product with a mass concentration between 10.0 and 17.6%. The aqueous solution is used to immerse the CuO powder in an equal volume for 12-18 hours, dried, pressed into tablets, and ground, and the particles of 20-40 meshes are used as catalysts. The preparation method of the catalyst provided by the invention is simple and easy to operate. Realized the advantages of methanol dehydrogenation under anaerobic conditions to obtain methylal and mild reaction conditions.

Description

technical field [0001] The invention belongs to a solid catalyst for synthesizing methylal by direct dehydrogenation of methanol, a preparation method and an application. Background technique [0002] Compared with tert-butyl methyl ether, as an oil additive, methylal not only has a high oxygen content, is not limited by the production of isobutylene, and has no environmental problems; in addition, it is also a good choice in cosmetics, pharmaceuticals, paints and rubber industries. organic solvents; as a cleaning agent, methylal can replace chlorinated solvents and reduce the emission of volatile organic compounds; methylal can also be used to synthesize high-purity formaldehyde. [0003] The traditional industrial methylal synthesis process is mainly divided into two steps starting from methanol. First, methanol is oxidized to formaldehyde, and then methanol and formaldehyde are condensed to form methylal. The former step is catalyzed by silver (600-650°C) or iron-molybde...

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): B01J23/889C07C43/303C07C41/50
Inventor 孙予罕魏伟曹虎管莲秀赵宁
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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