Supercharge Your Innovation With Domain-Expert AI Agents!

Methanol recovery method in rectification process for preparing ethylene glycol from synthesis gas and methanol recovery tower

A methanol recovery tower, methanol recovery technology, applied in chemical instruments and methods, preparation of hydroxyl compounds, preparation of organic compounds, etc., can solve the problems of complex process, large equipment occupation, high energy consumption, optimize process pipelines, reduce The effect of thermal energy consumption and equipment space saving

Pending Publication Date: 2022-02-18
XINJIANG TIANYE GRP +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Methanol recovery is an indispensable part of the coal-to-ethylene glycol process technology. The traditional methanol recovery tower is equipped with a material feed port, and two materials of different purity (crude methanol, crude ethylene glycol containing methanol) Carrying out rectification to separate methanol, and making the methanol content in the ethylene glycol product reach the target requires two towers to complete, the process is complicated, the energy consumption is high, and the equipment occupies a large area

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
  • Methanol recovery method in rectification process for preparing ethylene glycol from synthesis gas and methanol recovery tower
  • Methanol recovery method in rectification process for preparing ethylene glycol from synthesis gas and methanol recovery tower
  • Methanol recovery method in rectification process for preparing ethylene glycol from synthesis gas and methanol recovery tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] combine figure 1 , figure 2 The present invention is further described. refer to figure 1 As shown, the present invention provides a methanol recovery tower for methanol recovery in the synthesis gas-to-ethylene glycol rectification process in combination with on-site process conditions and the different characteristics of methanol content in crude methanol and crude ethylene glycol, which includes an outer tower body 1, Inner tower body 19, reboiler a14, reboiler b6 and reboiler c9, the tower diameter of described inner tower body 19 is less than the tower diameter of outer tower body 1, and inner tower body 19 is arranged on the lower end of outer tower body 1 In the skirt 16, the upper end of the inner tower body 19 is fixed on the inner wall of the skirt 16 by reducing the diameter, and the tower still of the outer tower body 1 is communicated with the tower top of the inner tower body 19; the outer tower body 1 is made of carbon steel and Made of composite mate...

Embodiment 2

[0041] (1) Crude methanol with a purity of 90% from the crude methanol storage tank and crude ethylene glycol with a purity of 85% from the crude ethylene glycol storage tank enter the outer tower body 1 from crude methanol inlet 11 and crude ethylene glycol inlet 12 respectively In the process, flow downward from the surface of the packing in the outer tower body 1 and contact the gas phase evaporated in the outer tower body for countercurrent mass transfer and heat transfer, the process gas phase flows out from the gas phase outlet 2 at the top of the outer tower body, and the refined methanol comes from the refined methanol recovery outlet 4 Flow out and enter the refined methanol storage tank;

[0042] (2) The temperature of the process gas phase at the top of the methanol recovery tower is controlled at 57°C, and the process gas phase flows out from the gas phase outlet 2 at the top of the outer tower body 1 and passes through the primary cooler of the methanol recovery to...

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

PropertyMeasurementUnit
purityaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of methanol refining, and particularly provides a methanol recovery method and a methanol recovery tower in a rectification process for preparing ethylene glycol from synthesis gas, and the method comprises the following steps: rectifying and separating two materials with different concentrations, namely crude methanol and crude ethylene glycol, in the methanol recovery tower at the same time, and laterally extracting refined methanol; wherein meanwhile, the content of methanol in tower kettle liquid flowing out of the inner tower body meets the index requirement; according to the method, the methanol recovery tower comprises an outer tower body, an inner tower body, a reboiler a, a reboiler b and a reboiler c, the tower diameter of the inner tower body is smaller than that of the outer tower body, and the tower top of the inner tower body is communicated with a tower kettle of the outer tower body through reducing; a crude methanol inlet formed in the outer tower body is higher than a crude ethylene glycol inlet and is formed in different packing layers, so that separation and purification of crude methanol and methanol in crude ethylene glycol are facilitated; and the tower diameter of the inner tower body is small, the gas-liquid two-phase short circuit phenomenon during low load can be effectively avoided on the filler surface of the inner tower body, meanwhile, the process pipeline is optimized, the occupied area of equipment is saved, and the heat consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of methanol refining, and specifically provides a methanol recovery method and a methanol recovery tower in the rectification process for producing ethylene glycol from synthesis gas. Background technique [0002] Ethylene glycol is an important chemical basic organic raw material, mainly used in the production of polyester (which can further produce polyester fiber, beverage bottles, films, etc.), antifreeze, etc. Polyester is the main consumption area of ​​ethylene glycol in my country, and its consumption currently accounts for about 94% of the total domestic consumption. The polyester carbon fiber produced by it has high strength and corrosion resistance, and is recognized as a non-hazardous high-tech engineering material in the world. [0003] The traditional ethylene glycol production method is to follow the petrochemical route, that is, ethylene is obtained from petroleum processing, and then ethylene...

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): B01D3/32B01D3/42C07C29/80C07C31/04C07C31/20
CPCB01D3/32B01D3/42C07C29/80C07C31/04C07C31/202
Inventor 宋晓玲张立金华李伟徐大魁付军之曹志晔成金平陈玉玲魏玉杰叶展乔玉山贾利军巨文章
Owner XINJIANG TIANYE GRP
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