Supercharge Your Innovation With Domain-Expert AI Agents!

Process for the preparation of dimethyl ether

A technology of dimethyl ether and methanol, which is applied in the field of preparation of dimethyl ether, can solve the problems of high cost

Inactive Publication Date: 2014-05-28
HALDOR TOPSOE AS
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Removing CO2 from the DME product downstream of the synthesis reactor can become very expensive

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
  • Process for the preparation of dimethyl ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0031] Using the above and shown in figure 1 The effects of the methods in are summarized in Tables 1-3 below. Product mixture 3, which had been cooled to 130°C, had the composition shown in Table 1.

[0032] Table 1

[0033] components

N m 3 / h

Volume %

H 2

37361

17.53

h 2 o

1255

0.59

N 2

19182

9.00

CO

35582

16.69

CO 2

69187

32.46

Methanol

3173

1.49

DME

47386

22.23

[0034] The treated effluent 5 of the absorbent unit 4 , which has been washed with potassium carbonate, is at a temperature of 71° C. when it is introduced to the solid adsorbent 6 . The composition of Effluent 5 is shown in Table 2 and the composition of Effluent 7 from Adsorbent 6 is shown in Table 3.

[0035] Table 2

[0036] components

N m 3 / h

Volume %

H 2

37361

26.17

h 2 o

165

0....

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

Process for the preparation of dimethyl ether product by catalytic conversion of synthesis gas to dimethyl ether comprising contacting a stream of synthesis gas comprising carbon dioxide with one or more catalysts active in the formation of methanol and the dehydration of methanol to dimethyl ether to form a product mixture comprising the components dimethyl ether, methanol, carbon dioxide and unconverted synthesis gas, washing the product mixture comprising carbon dioxide and unconverted synthesis gas in a scrubbing zone with a liquid solvent being rich in potassium carbonate or amine and thereby selectively absorbing carbon dioxide in the liquid solvent, subjecting the thus treated product mixture to a distillation step to separate methanol and water from dimethyl ether and unconverted synthesis gas stream with a reduced content of carbon dioxide and separating the unconverted synthesis gas from the dimethyl ether product.

Description

technical field [0001] The invention relates to a method for preparing dimethyl ether from synthesis gas. In particular, the present invention relates to an improved dimethyl ether synthesis process utilizing chemical scrubbing of the crude product effluent from an ether synthesis step to remove carbon dioxide from the crude product, thereby increasing the process yield and final dimethyl ether produced. purification. Background of the invention [0002] The process of the invention relates to the purification of dimethyl ether produced from synthesis gas comprising carbon oxides and hydrogen. [0003] The conversion of synthesis gas to dimethyl ether is carried out in one or more reactors, wherein the synthesis gas is catalytically converted to methanol as shown in equation (1) and dimethyl ether as shown in equation (2). A transfer reaction also occurs and is shown in equation (3). [0004] CO+2H 2 →CH 3 OH (1) [0005] 2CH 3 OH→CH 3 OCH 3 +H 2 O (2) [0006] CO...

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): C07C43/04C07C41/01
CPCC07C41/01C07C41/09C07C41/36C07C43/043
Inventor J·马德森
Owner HALDOR TOPSOE AS
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com