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

Chromatographic column, preparation method thereof and application thereof to analysis of mixture comprising 1,2-dichloroethane, ethyl chloride, methyl chloride and/or vinyl chloride

A technique for analyzing dichloroethane and gas chromatography, which is applied in the field of preparing the chromatographic column, can solve the problems of high requirements for sample gas pretreatment, complicated methods, expensive equipment and the like, and achieves the effects of effective separation and accurate quantification.

Inactive Publication Date: 2012-07-11
CHINA PETROLEUM & CHEM CORP +1
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is complicated, the equipment is expensive, and the requirements for sample gas pretreatment are high

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
  • Chromatographic column, preparation method thereof and application thereof to analysis of mixture comprising 1,2-dichloroethane, ethyl chloride, methyl chloride and/or vinyl chloride
  • Chromatographic column, preparation method thereof and application thereof to analysis of mixture comprising 1,2-dichloroethane, ethyl chloride, methyl chloride and/or vinyl chloride
  • Chromatographic column, preparation method thereof and application thereof to analysis of mixture comprising 1,2-dichloroethane, ethyl chloride, methyl chloride and/or vinyl chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The feed gas stream with the following composition was fed for 4500 h -1 The space velocity is fed in the ethylene oxide industrial production device, and the bed layer of 26 tons of YS-7 type silver catalysts (Sinopec Catalyst Beijing Yanshan Branch) is housed in the device:

[0055] Ethylene 28.5 mol%;

[0056] Oxygen 7.90 mol%;

[0057] Carbon dioxide 6.50 mol%;

[0058] Ethane 0.35 mol%;

[0059] Methane 46.2 mol%;

[0060] Ethylene oxide 2.50 mol%.

[0061] Simultaneously, ethylene chloride was added as an inhibitor to the feed gas stream at a flow rate of 385 g / h, and ethylene and oxygen were reacted to generate ethylene oxide at a temperature of 225° C. and a pressure of 2.1 MPa. The product gas stream is withdrawn from the unit and the desired product ethylene oxide is separated off. A gas mixture comprising mainly unreacted ethylene and oxygen is recycled to the plant. At this point, the chlorides in the recycle gas stream that need to be analyzed by gas...

Embodiment 2

[0072] The feed gas stream with the following composition was fed for 5000 h -1 The space velocity is fed in the ethylene oxide industrial production unit, and the bed layer of 24 tons of YS-7 type silver catalysts (Sinopec Catalyst Beijing Yanshan Branch) is housed in said unit:

[0073] Ethylene 29.1 mol%;

[0074] Oxygen 8.10 mol%;

[0075] Carbon dioxide 5.50 mol%;

[0076] Ethane 0.25 mol%;

[0077] Methane 48.8 mol%;

[0078] Ethylene oxide 2.35 mol%.

[0079] At the same time, 1,2-dichloroethane was added to the feed gas stream at a flow rate of 150 g / h as an inhibitor, and ethylene and oxygen were reacted to generate ethylene oxide at a temperature of 238° C. and a pressure of 2.1 MPa. The product gas stream is withdrawn from the unit and the desired product ethylene oxide is separated off. A gas mixture comprising mainly unreacted ethylene and oxygen is recycled to the plant. At this point, the chlorides in the recycle gas stream that need to be analyzed by gas...

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
The inside diameter ofaaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a chromatographic column for performing gas chromatographic analysis on a mixture comprising 1,2-dichloroethane, ethyl chloride, methyl chloride and / or vinyl chloride. A fixed phase is a mixture of GDX 502 of 60-80 meshes and Porapak P of 80-100 meshes, wherein the weight ratio of GDX 502 to Porapak P is (0.3-0.6):1. The invention further relates to a method for preparing the chromatographic column, which comprises the following step of: preparing a mixture of GDX 502 of 60-80 meshes and Porapak P of 80-100 meshes for serving as the fixed phase. The invention further relates to a method for performing gas chromatographic analysis on the mixture comprising 1,2-dichloroethane, ethyl chloride, methyl chloride and / or vinyl chloride, which comprises the following step of: making the mixture pass through the chromatographic column. The GDX 502 with a good separating effect on methyl chloride and Porapak P with good separating effects on ethyl chloride and vinyl chloride are combined together, and the mixture is taken as the fixed phase, so that 1,2-dichloroethane, ethyl chloride, methyl chloride and / or vinyl chloride in the mixture can be separated effectively and quantified accurately.

Description

technical field [0001] The present invention relates to a chromatographic column for gas chromatographic analysis of a mixture comprising 1,2-dichloroethane, chloroethane, methyl chloride and / or vinyl chloride, and further relates to a method for preparing the chromatographic column and The application of the chromatographic column in gas chromatographic analysis of a mixture containing 1,2-dichloroethane, ethyl chloride, methyl chloride and / or vinyl chloride. Background technique [0002] The production of ethylene oxide by reacting ethylene with oxygen over a silver catalyst is an important industrial process. A trace amount of 1,2-dichloroethane or ethyl chloride needs to be added to the feed gas as an inhibitor. The 1,2-dichloroethane or ethyl chloride in the feed gas is partially reacted to produce methyl chloride, ethyl chloride and vinyl chloride when passing through the silver catalyst bed, and is recycled to the feed gas with unreacted ethylene and oxygen . In in...

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): G01N30/60G01N30/02
Inventor 蒋文贞孙雪莲李金兵陈建设张志祥蒋军代武军
Owner CHINA PETROLEUM & CHEM CORP
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