CN105784782A - Online detection for trace moisture of anhydrous hydrogen fluoride - Google Patents
Online detection for trace moisture of anhydrous hydrogen fluoride Download PDFInfo
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- CN105784782A CN105784782A CN201610196156.0A CN201610196156A CN105784782A CN 105784782 A CN105784782 A CN 105784782A CN 201610196156 A CN201610196156 A CN 201610196156A CN 105784782 A CN105784782 A CN 105784782A
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- hydrogen fluoride
- anhydrous hydrogen
- trace moisture
- moisture content
- flowing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/048—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance for determining moisture content of the material
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The invention relates to the online detection for trace moisture of anhydrous hydrogen fluoride. A flowing conductive battery used for detecting trace moisture according to a conductive method is composed of a stainless steel shell with an interlayer, a polytetrafluoroethylene liner, a platinum electrode, a seal ring and a valve; the flowing conductive battery is in parallel connection with an anhydrous hydrogen fluoride dewatering production line in a form of bypass; the temperature of the flowing conductive battery is controlled to be 0 DEG C; in a detection process, a tee joint is turned to the bypass and a conductivity meter is used for recording and calculating test data; the flowing conductive battery has the characteristics of capability of realizing the online detection for trace moisture of anhydrous hydrogen fluoride, safety, accuracy and reliability.
Description
Art
The present invention relates to the inspection of inorganic fluoriding chemical product, more specifically to the mensuration of trace moisture content in anhydrous hydrogen fluoride product.
Background technology
Anhydrous hydrogen fluoride has severe corrosive because of it, strong toxicity, strong reactivity, strongly hydrophilic, so the trace moisture determination of anhydrous hydrogen fluoride product is extremely difficult, particularly on-line checking is just more difficult. and the mensuration of anhydrous hydrogen fluoride trace moisture content is generally adopted two kinds of methods both at home and abroad at present, i.e. conductance method and karr Fei Xiufa.It is big that karr Fei Xiufa measures the moisture error in anhydrous hydrogen fluoride, and is difficulty with on-line determination.The detection of the trace moisture content of product generally more adopts conductance method, but up to this point, not yet finds the on-line checking having trace moisture content in the production process of anhydrous hydrogen fluoride.
Summary of the invention
In order to realize the on-line checking of anhydrous hydrogen fluoride trace moisture content, the present invention devises the flowing conductance cell of a kind of By Means of Electrical Conductivity trace moisture content, and this flowing conductance cell is corrosion-resistant, good airproof performance, it is possible to temperature control, in that context it may be convenient to install on a production line.
The on-line checking of a kind of anhydrous hydrogen fluoride trace moisture content of the present invention, mainly includes one and can be used for eonductometric flowing conductance cell, and conductance cell is made up of the stainless steel casing of sandwich, polytetrafluoroethyllining lining, platinum electrode, sealing ring and valve.
Flowing conductance cell is connected in parallel on anhydrous hydrogen fluoride dehydration production line with the form of bypass, and the temperature of flowing conductance cell controls at 0 DEG C, it is necessary to during detection, threeway turns to bypass, after system balancing, with conductivity meter record and calculate test data.
This flowing conductance cell provides the benefit that can realize on-line checking in situation convenient, safe and accurate, reliable to the trace moisture content in anhydrous hydrogen fluoride product, shortens production cycle limit, reduces production cost.
Detailed description of the invention
Embodiment 1
On anhydrous hydrogen fluoride dehydration production line, it is 260ppm for the anhydrous hydrogen fluoride water content dewatered.The test temperature of flowing conductance cell is 0 DEG C.It is first shut off bypass p-wire, start the circulating production line that dewaters, after 3 hours, close production line, start p-wire, after half an hour, read the test data of conductivity meter continuously, obtain after stablizing data, close bypass p-wire, unlatching production line works on, after 3 hours, repeat the test program of last time and record data, amounting in triplicate, calculating test result on the standard curve of the anhydrous hydrogen fluoride water content that test data are drawn when temperature is 0 DEG C, water content is 92.3PPM, 45.7PPM and 46.5PPM respectively.
Embodiment 2
On anhydrous hydrogen fluoride dehydration production line, it is 395ppm for the anhydrous hydrogen fluoride water content dewatered.Repeat the operation of embodiment 1 completely, water content respectively 122.8PPM, 47.3PPM and 44.9PPM after three times measure.
Claims (4)
1. the on-line checking of an anhydrous hydrogen fluoride trace moisture content, it is characterized in that: be made up of the stainless steel casing of sandwich, polytetrafluoroethyllining lining, platinum electrode, sealing ring and valve with the flowing conductance cell of By Means of Electrical Conductivity trace moisture content, flowing conductance cell is connected in parallel on anhydrous hydrogen fluoride dehydration production line with the form of bypass, the temperature of flowing conductance cell controls, at 0 DEG C, to be realized the on-line checking of anhydrous hydrogen fluoride trace moisture content by switch valve.
2. the on-line checking of an anhydrous hydrogen fluoride trace moisture content, it is characterised in that: flowing conductance cell is made up of the stainless steel casing of sandwich, polytetrafluoroethyllining lining, platinum electrode, sealing ring and valve.
3. the on-line checking of an anhydrous hydrogen fluoride trace moisture content, it is characterised in that: flowing conductance cell is connected in parallel on anhydrous hydrogen fluoride dehydration production line with the form of bypass, is realized the on-line checking of anhydrous hydrogen fluoride trace moisture content by switch valve.
4. the on-line checking of an anhydrous hydrogen fluoride trace moisture content, it is characterised in that: the temperature of flowing conductance cell controls at 0 ± 0.1 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610196156.0A CN105784782A (en) | 2016-03-18 | 2016-03-18 | Online detection for trace moisture of anhydrous hydrogen fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610196156.0A CN105784782A (en) | 2016-03-18 | 2016-03-18 | Online detection for trace moisture of anhydrous hydrogen fluoride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105784782A true CN105784782A (en) | 2016-07-20 |
Family
ID=56395496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610196156.0A Pending CN105784782A (en) | 2016-03-18 | 2016-03-18 | Online detection for trace moisture of anhydrous hydrogen fluoride |
Country Status (1)
| Country | Link |
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| CN (1) | CN105784782A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595758A (en) * | 2020-11-09 | 2021-04-02 | 中核四0四有限公司 | Measuring device suitable for moisture content in anhydrous hydrogen fluoride |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07107521B2 (en) * | 1988-02-10 | 1995-11-15 | 東ソー株式会社 | Electric conductivity meter |
| CN103344676A (en) * | 2013-07-26 | 2013-10-09 | 森田化工(张家港)有限公司 | Method for determining trace moisture in hydrogen fluoride |
-
2016
- 2016-03-18 CN CN201610196156.0A patent/CN105784782A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07107521B2 (en) * | 1988-02-10 | 1995-11-15 | 東ソー株式会社 | Electric conductivity meter |
| CN103344676A (en) * | 2013-07-26 | 2013-10-09 | 森田化工(张家港)有限公司 | Method for determining trace moisture in hydrogen fluoride |
Non-Patent Citations (1)
| Title |
|---|
| 中国标准出版社总编室: "《中国国家标准汇编 1997年修订 7》", 31 December 1999, 中国标准出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112595758A (en) * | 2020-11-09 | 2021-04-02 | 中核四0四有限公司 | Measuring device suitable for moisture content in anhydrous hydrogen fluoride |
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| CB02 | Change of applicant information |
Address after: 515071 A06 block office building, Shantou Free Trade Zone, Guangdong Applicant after: Guangdong high tech Limited by Share Ltd Address before: 515071 golden light industrial zone, Shantou Free Trade Zone, Guangdong Applicant before: Shantou Jinguang Gaoke Co., Ltd. |
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| COR | Change of bibliographic data | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160720 |