Method of refining synthetic methanol with heat integration

A technology for synthesizing methanol and a refining method, applied in the field of synthetic methanol refining, can solve the problems of increased steam unit consumption, large reflux ratio and high degree of separation in an atmospheric column, and achieve the advantages of reducing dosage, reducing reflux ratio and increasing feed concentration. Effect

Inactive Publication Date: 2007-08-08
ZHEJIANG UNIV
View PDF0 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Through analysis and research, we found that the common three-tower process also has the following disadvantages: 1) Since the concentration of methanol discharged from the bottom of the pressurized tower is lower than that of the feed methanol, the separation degree of the atmospheric column is lower than that of the atmospheric column in the two-tower process. The degree of separation is high, and the reflux ratio required to achieve the same product purity is larger, thereby causing an increase in

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 of refining synthetic methanol with heat integration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The crude methanol feed flow rate is 14000kg / h, the composition is shown in Table 1, and the tower equipment parameters are shown in Table 2. Tables 3 to 6 show the comparison data of the two three-tower processes, among which Table 3 is the comparison of material flow, Table 4 is the comparison of feed composition of the atmospheric tower, Table 5 is the comparison of steam consumption, and Table 6 is the comparison of soft water consumption.

[0014] Table 1 crude methanol composition (mass fraction)

[0015] Methanol

Dimethyl ether

ethanol

water

Fusel oil

formic acid

Methyl formate

Acetone

n-Hexane

n-octane

0.934

0.007

5.70×l0 -4

0.056

0.001

1.00×10 -5

1.00×10 -5

8.56×10 -5

4.00×10 -4

2.86×10 -4

[0016] Table 2 Tower Equipment Parameters

[0017] Pre-tower

pressurized tower

Atmospheric tower

Top pressure

Column...

Embodiment 2

[0027] The crude methanol feed flow rate is 14000kg / h, the composition is shown in Table 1, and the tower equipment parameters are shown in Table 2. Tables 3 to 6 show the comparison data of the two three-tower processes, among which Table 3 is the comparison of material flow, Table 4 is the comparison of feed composition of the atmospheric tower, Table 5 is the comparison of steam consumption, and Table 6 is the comparison of soft water consumption.

[0028] Table 1 crude methanol composition (mass fraction)

[0029] Methanol

Dimethyl ether

ethanol

water

Fusel oil

formic acid

Methyl formate

Acetone

n-Hexane

n-octane

0.87

0.02

3.0×10 -4

0.1

0.0068

1.00×10 -5

1.00×10 -3

2.77×10 -3

3.90×10 -6

1.00×10 -4

[0030] Table 2 Tower Equipment Parameters

[0031] Pre-tower

pressurized tower

Atmospheric tower

Top pressure

Column pressu...

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 finishing method to synthesize carbinol, which is characterized by the following: rectifying rough carbinol in the pre-tower; adding extracting water from the top of pre-tower; discharging light component from the top of pre-tower; entering rought carbinol into middle part of pressurizing tower to rectify; making residual rough carbinol into middle part of normal pressure tower to rectify; draining waste water from the bottom of tower; dividing the steam of pressurizing tower into two parts to transmit into reboiler on the bottom of pre-tower and reboiler on the bottom of normal pressure tower as heat providing dielectric.

Description

technical field [0001] The invention relates to a method for refining synthetic methanol with heat integration. It belongs to resource and energy saving chemical production technology. Background technique [0002] Methanol is an important organic chemical raw material and new energy fuel, and has a wide range of uses in the fields of chemical industry, light industry and clean energy. In the industrial production process of synthetic methanol, the refining of crude methanol is not only an important process that determines the quality of methanol products, but also the energy consumption of the refining process is one of the key factors affecting the production cost of methanol. Therefore, under the condition of ensuring the quality of methanol products, it is of great significance to save energy and reduce consumption in the methanol refining process. At present, the energy-saving refining process that has been widely used in the synthetic methanol industry is the three-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
IPC IPC(8): C07C29/74C07C31/04
Inventor 吴嘉周志超胡晓萍陈露林子昕
Owner ZHEJIANG UNIV
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