Sodium methoxide and dimethyl ether combined production technology

A technology for sodium methoxide and dimethyl ether, which is applied in the field of co-production technology for preparing sodium methoxide and dimethyl ether, can solve the problems of high energy consumption and large thermal energy consumption, and achieves the advantages of reducing energy consumption and equipment investment and reducing production costs. Effect

Inactive Publication Date: 2015-02-11
黄志忠
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the recovered methanol is evaporated from the top of the methanol pressurized rectification tower and then condensed, and requires a certain reflux ratio, which consumes a lot of heat energy; and the recovered methanol is in the liquid phase, and it needs to be heated when it is returned as a raw material Vaporization also consumes a lot of heat energy
Therefore, this method consumes a lot of energy

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
  • Sodium methoxide and dimethyl ether combined production technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The raw material methanol is 85 (wt)% methanol, and in the synthesis tower, the reaction temperature of methanol and sodium hydroxide is 80°C, and the reaction pressure is 0.5MPa; in the dimethyl ether reactor, the reaction temperature is 215°C, and the reaction pressure is 0.5MPa, methanol liquid volume space velocity is 1.8 hours -1 , the reaction product enters the middle and lower part of the dimethyl ether rectification tower to realize the separation of dimethyl ether and methanol, and obtains a still liquid containing methanol, water, etc. grade dimethyl ether products. The dimethyl ether rectification tower is a plate tower with a total of 92 theoretical trays, of which the rectification section has 68 trays, the top pressure is 0.70MPa, the top temperature is 25°C, and the reflux ratio is 1.8. Among them, the dehydration catalyst used in the dimethyl ether reactor is based on ZSM-5 molecular sieve, and it is impregnated in NaBF containing 1.0wt% 4 and 2.0wt% ...

Embodiment 2

[0025] The raw material methanol is 85 (wt)% methanol, and in the synthesis tower, the reaction temperature of methanol and sodium hydroxide is 80°C, and the reaction pressure is 0.5MPa; in the dimethyl ether reactor, the reaction temperature is 215°C, and the reaction pressure is 0.5MPa, methanol liquid volume space velocity is 1.8 hours -1 , the reaction product enters the middle and lower part of the dimethyl ether rectification tower to realize the separation of dimethyl ether and methanol, and obtains a still liquid containing methanol, water, etc. grade dimethyl ether products. The dimethyl ether rectification tower is a plate tower with a total of 92 theoretical trays, of which the rectification section has 68 trays, the top pressure is 0.70MPa, the top temperature is 25°C, and the reflux ratio is 1.8. Among them, the dehydration catalyst used in the dimethyl ether reactor is based on ZSM-5 molecular sieve, and it is impregnated in NaBF containing 1.0wt% 4 and 2.0wt% ...

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 sodium methoxide and dimethyl ether combined production technology, which comprises the following steps: a raw material methanol is introduced in a methanol vaporization tower for vaporization, the vaporized methanol in introduced in a synthetic tower, sodium hydroxide and methanol in the synthetic tower are reacted to obtain reaction products containing sodium methoxide, methanol steam and water, sodium methoxide is discharged from the bottom of the synthetic tower and then collected, the aqueous methanol steam is introduce4d in a dimethyl ether reactor, after dehydration reaction, dimethyl ether is extracted from upper side line of a dimethyl ether rectifying tower, methanol and water are introduced in a methanol rectifying tower, and the rectified methanol is recovered and utilized in the methanol vaporization tower. According to the invention, a dimethyl ether production apparatus is used for producing a lot of absolute methanol steam, the absolute methanol steam is introduced in a sodium methoxide synthesis reaction tower, sodium methoxide is generated at bottom of the tower, and the aqueous methanol steam from the tower top is send to the dimethyl ether reactor for producing dimethyl ether. The technology effectively use the heat released through sodium methoxide generation reaction by methanol, energy consumption and equipment investment are reduced, and the dimethyl ether and sodium methoxide production cost can be reduced.

Description

technical field [0001] The invention relates to the field of chemical industry, more specifically, the invention relates to a co-production process for preparing sodium methoxide and dimethyl ether with methanol as raw material. Background technique [0002] Sodium methoxide is an important organic synthesis intermediate, widely used in medicine, chemical industry, pesticide, fuel and other industries. [0003] The preparation method of sodium methylate is to adopt sodium hydroxide and methanol reaction dehydration to generate sodium methylate, and its reaction equation is as follows: [0004] NaOH+CH 3 OH→CH 3 ONa+H 2 o [0005] The reaction is exothermic and reversible, and sodium methoxide will decompose into sodium hydroxide and methanol when it meets water. Therefore, how to remove the water produced by the reaction is the key technology. In the traditional industry, a large amount of anhydrous methanol vapor is introduced at the bottom of the reaction synthesis t...

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): C07C31/30C07C29/70C07C43/04C07C41/09
CPCC07C29/70C07C41/09
Inventor 郑秋鉴庄明强陈亚辉廖启武段存成张辉游杰
Owner 黄志忠
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
PatSnap group products

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