Process for implementing tetrafluoroethylene monomer continuous analysis applying on-line chromatographic technique

A tetrafluoroethylene and chromatographic technology, which is used in the analysis field of on-line gas chromatography in the continuous production process of tetrafluoroethylene monomer, can solve the problems such as difficulty in analyzing the content of main impurities in the purity of tetrafluoroethylene monomer, and achieves improved real-time sexual effect

Inactive Publication Date: 2005-06-29
JUHUA GRP +1
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Problems solved by technology

[0008] In order to solve the problem of difficulty in analyzing the purity of tetrafluoroethylene monomer and the content of main impurities in the production process of polytetrafluoroethylene, the present invention provides a method for continuous analysi

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  • Process for implementing tetrafluoroethylene monomer continuous analysis applying on-line chromatographic technique

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Embodiment Construction

[0019] Specific embodiments of the present invention will be described in detail below.

[0020] The present invention adopts VISTA2000 online chromatograph of ABB company, FID detector,

[0021] 1) Selection conditions: chromatographic column: a packed column with a ratio of 30% of Apisone immobilized on activated alumina; chromatographic column temperature: 70°C; detector temperature: 80°C; carrier gas: 99.9999% by volume Nitrogen; gas: hydrogen with a volume percentage of 99.9999%; supporting gas: air; carrier gas pressure and flow matching are operated according to the instructions;

[0022] 2) Standard sample preparation: Inject 5ml of tetrafluoroethylene with a volume percentage greater than 99.99% in the sampling bladder full of nitrogen, inject each 5ml of difluorochloromethane (CHF) with a volume percentage greater than 99.99% with a syringe 2 Cl), trifluoromethane (CHF 3 ) and difluoromethane (CH 2 f 2 ), measure the total volume of gas in the bladder by the drai...

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Abstract

This invention discloses a method to continuously analyze the perfluoroethylene monomer by use of on-line chromatogram technique, which comprises the following steps: to choose conditions; sample alignment; analysis process; column system combination; control procedure. The trifluoromethane, dichlorodifluoromethane and chloromethane in the perfluoroethylene single body by the method effectively improve the real-time property of the TFE single body quality monitoring.

Description

technical field [0001] The present invention relates to the analysis method of gas chromatography, more specifically relates to a kind of analysis method that online gas chromatography is used in the continuous production process of tetrafluoroethylene monomer. Background technique [0002] Gas chromatographic analysis methods are widely used in industry, and the usual method is to take samples from the workshop and send the samples to the laboratory for chromatographic analysis, that is, offline (off-line) analysis. For example, the content disclosed in the article "Organic Fluorine Industry" 2001, (2): 33-34 "Research on the Detection of Tetrafluoroethylene Monomer" is the research on the detection of tetrafluoroethylene monomer by off-line gas chromatography. Since off-line analysis is applied in the continuous industrial production process, the content of each component in the device cannot be obtained at any time, and the factors affecting product quality in the product...

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Application Information

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IPC IPC(8): G01N30/06G01N30/60G01N30/88
Inventor 李志永
Owner JUHUA GRP
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