WO2010066190A1 - 添加铬或同时添加铬、钒之钨基体中铬含量的测定方法 - Google Patents
添加铬或同时添加铬、钒之钨基体中铬含量的测定方法 Download PDFInfo
- Publication number
- WO2010066190A1 WO2010066190A1 PCT/CN2009/075418 CN2009075418W WO2010066190A1 WO 2010066190 A1 WO2010066190 A1 WO 2010066190A1 CN 2009075418 W CN2009075418 W CN 2009075418W WO 2010066190 A1 WO2010066190 A1 WO 2010066190A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- solution
- chromium
- add
- vanadium
- standard solution
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/79—Photometric titration
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/22—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using chemical indicators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the invention relates to a method for determining the chromium content in a tungsten matrix in which chromium or vanadium is added.
- the term "optimization of analytical conditions" in the present invention refers to a novel redox system, which makes the classical redox titration method successfully applied to the accurate determination of constant chromium in a tungsten system, and the method is simple, accurate and fast.
- the interference between chromium and vanadium can be accurately and quantitatively eliminated during the analysis, and the accurate determination of chromium and vanadium content in the tungsten matrix with simultaneous addition of chromium and vanadium can be completed.
- matrix is also referred to as “medium” or “matrix” in this specification.
- tungsten matrix means that all other substances and components other than the analyte in the analysis sample are tungsten, such as tungsten carbide or the like. Background technique
- Most enterprises use the classical redox titration method to measure the constant chromium in the tungsten system, that is, in the acidic medium, using silver nitrate as the catalyst, the manganese salt indicating, using ammonium persulfate as the oxidant to oxidize the low-valent chromium, and the sodium chloride to destroy the high-priced manganese.
- the chromium content is determined by titration with a ferrous standard solution.
- the classical redox titration method for determining the chromium content in a tungsten-added tungsten matrix is as follows:
- the method is applicable to the determination of the amount of chromium in a tungsten matrix separately added with chromium, and the measurement range is 0.05 to 1.00%.
- the sample was dissolved in sulfuric acid and ammonium sulfate, and silver nitrate was used as a catalyst in a sulfuric acid medium to oxidize with ammonium persulfate, and chromium was titrated with a ferrous standard solution.
- V 2 Transfer the volume of ammonium ferrous sulfate solution, ml.
- the sieve was crushed and passed through a 0.18 mm sieve in a mortar which did not change the composition of the sample.
- V the volume of the ferrous standard solution, ml
- the object of the present invention is to provide a method for determining the chromium content in a tungsten matrix added with chromium or simultaneously adding chromium and vanadium, which is used in the redox process to eliminate chromium during the redox process.
- the precipitate makes the measurement completely in clear and transparent state, and completely eliminates the interference of vanadium, and improves the detection accuracy and detection speed of the chromium content in the tungsten matrix of chromium or vanadium alone or simultaneously.
- the present invention provides a method for determining the chromium content in a tungsten or vanadium-containing tungsten matrix, either separately or simultaneously, characterized in that the sample is smeared with sodium hydroxide and hot water; and the sodium peroxide is simultaneously It also acts as an oxidant to oxidize all chromium to high-valent chromium. It is complexed with ammonium hydrogen fluoride to avoid the precipitation of tungstic acid. The whole analysis process avoids the precipitation and turbidity. The titration can be carried out in a completely clear and transparent state. The titration result Accurate and reliable.
- the clear and transparent of the titration solution is very important for the accuracy of the titration analysis; the solution of the whole measurement process is always clear and transparent, which ensures the accurate quantitative elimination of vanadium interference when measuring the ruthenium; the interference of vanadium is oxidized with potassium permanganate, and sulfuric acid is used.
- the ferrous ammonium standard solution is titrated and subtracted.
- the invention does not use the reagents such as silver nitrate, ammonium persulfate, manganese salt and sodium chloride used in the chromium oxide measurement by the classical redox titration method, but uses a complexing agent and an oxidizing agent to successfully complete the process.
- the redox process can keep the solution clear and transparent throughout the analysis process, and can accurately eliminate the mutual interference between chromium and vanadium, so that the detection accuracy is improved by one grade, and the detection result is accurate, fast and reproducible. This is because:
- the oxidizing agent can prevent the sample solution from generating any precipitate during the heating process
- the sample solution is always clear and transparent, which ensures that the mutual interference between chromium and vanadium is quantitatively eliminated during the measurement; the accurate determination of the content of chromium and vanadium in the tungsten matrix with simultaneous addition of chromium and vanadium is achieved;
- the analysis cycle is greatly shortened, and only about 1/4 of the analysis time of the classical redox titration method is required, which greatly improves the work efficiency.
- the classical method is time-consuming due to dissolution of the sample, plus subsequent repeated heating and cooling, and confirmation of whether the excess oxidant reducing agent has been completely destroyed, etc., making the analysis process particularly time consuming, at least for 3 or more hours, if there is a sediment splash loss.
- the test solution, leading to retesting takes nearly one day, and the efficiency is very low. This method only needs to be heated for 3 to 5 minutes when the leaching solution is not completely immersed in warm water, so that it is completely dissolved, and then it is kept in a cold state, and there is no problem of splashing, and the analysis takes only time.
- the entire analysis process avoids the formation of sedimentation and turbidity, and the titration can be carried out in a completely clear and transparent state, and the titration result is accurate and reliable.
- the clear and transparent of the titration solution is very important for the accuracy of the titration analysis; the solution is always clear and transparent throughout the measurement process, ensuring the quasi-determination of vanadium interference when measuring chromium.
- This method is applicable to the determination of chromium is added alone or simultaneously added chromium, vanadium, tungsten and tungsten carbide matrix chromium content redox titration, measuring range: 0 .o5 ⁇ i.oo%.
- the sample is melted with sodium peroxide, leached with hot water, sodium peroxide is also used as an oxidant, and all chromium is oxidized to high-valent chromium.
- the main body of tungsten is complexed with ammonium hydrogen fluoride, and the alkali solution is neutralized to the appropriate acidity to diphenylamine.
- Sodium sulfonate was used as an indicator and titrated with a standard solution of ammonium ferrous sulfate.
- the interference of vanadium is oxidized with potassium permanganate, titrated with ammonium ferrous sulfate, and subtracted by subtraction.
- V 2 - consumption of ammonium ferrous sulfate solution volume mL.
- the sieve was crushed and passed through a 0.18 mm sieve in a mortar which did not change the composition of the sample.
- Vl_ separately added chrome titration consumption of ferrous standard solution volume or simultaneous addition of chromium vanadium titration chrome vanadium co-consumption volume of ferrous standard solution, mL;
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020117012339A KR101372067B1 (ko) | 2008-12-12 | 2009-12-09 | 크롬이 첨가되거나 크롬 및 바나듐이 동시에 첨가된 텅스텐 매트릭스에서 크롬 함유량을 결정하기 위한 방법 |
EP09831467.7A EP2360468A4 (en) | 2008-12-12 | 2009-12-09 | METHOD OF MEASURING CHROMIUM CONTENT IN A CHROME / CHROME VANADIUM-ENRICHED TUNGSTEN MATRIX |
JP2011539881A JP2012511700A (ja) | 2008-12-12 | 2009-12-09 | クロムを付加したまたはクロム及びバナジウムを同時に付加したタングステンマトリクス内のクロム含有量決定方法 |
US13/139,032 US8557594B2 (en) | 2008-12-12 | 2009-12-09 | Method for determining chromium content in a tungsten matrix with added chromium or simultaneously added chromium and vanadium |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008102398215A CN101430287B (zh) | 2008-12-12 | 2008-12-12 | 添加铬或同时添加铬、钒之钨基体中铬含量的测定方法 |
CN200810239821.5 | 2008-12-12 |
Publications (1)
Publication Number | Publication Date |
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WO2010066190A1 true WO2010066190A1 (zh) | 2010-06-17 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2009/075418 WO2010066190A1 (zh) | 2008-12-12 | 2009-12-09 | 添加铬或同时添加铬、钒之钨基体中铬含量的测定方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8557594B2 (zh) |
EP (1) | EP2360468A4 (zh) |
JP (1) | JP2012511700A (zh) |
KR (1) | KR101372067B1 (zh) |
CN (1) | CN101430287B (zh) |
WO (1) | WO2010066190A1 (zh) |
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CN102279162A (zh) * | 2011-04-25 | 2011-12-14 | 湖北神舟化工有限公司 | 一种有机铬中铬含量的检测方法 |
CN109870335A (zh) * | 2019-01-29 | 2019-06-11 | 辽宁省农业科学院 | 一种可溶性腐植酸含量快速检测装置和检测方法 |
CN110836888A (zh) * | 2018-08-15 | 2020-02-25 | 张家港市国泰华荣化工新材料有限公司 | 有机硅产品中金属杂质的测定方法 |
CN110907433A (zh) * | 2019-12-17 | 2020-03-24 | 天津索克汽车试验有限公司 | 一种吸附了钒和钨气态化合物的γ-Al2O3中钒和钨含量的测定方法 |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1472822A1 (ru) * | 1986-11-11 | 1989-04-15 | Московский институт тонкой химической технологии им.М.В.Ломоносова | Способ определени ванади (ш,1у,у) в твердых материалах |
JPH05142149A (ja) * | 1991-11-18 | 1993-06-08 | Meidensha Corp | 限流素子中のバナジウムの定量分析方法 |
CN101173916A (zh) * | 2007-11-30 | 2008-05-07 | 攀钢集团攀枝花钢铁研究院 | 消除硫酸亚铁铵容量法测定钒时失误的方法 |
CN101430287A (zh) * | 2008-12-12 | 2009-05-13 | 江西稀有稀土金属钨业集团有限公司 | 添加铬或同时添加铬、钒之钨基体中铬含量的测定方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2960387A (en) * | 1958-03-14 | 1960-11-15 | Horizous Inc | Removal of chromium from titanium dioxide product |
US4305754A (en) * | 1980-04-15 | 1981-12-15 | Cabot Corporation | Chromium recovery from scrap alloys |
US4608235A (en) * | 1985-03-21 | 1986-08-26 | Gte Products Corporation | Recovery of cobalt |
JPS62198737A (ja) * | 1986-02-26 | 1987-09-02 | Babcock Hitachi Kk | バナジウム分析方法 |
US4798708A (en) * | 1988-02-16 | 1989-01-17 | Gte Products Corporation | Process for recovering chromium and other metal values from chromium bearing material |
US4966760A (en) * | 1988-08-26 | 1990-10-30 | Ladd Judith A | Method for recovering chromium from chromium-bearing material |
US5106795A (en) * | 1989-05-26 | 1992-04-21 | Corhart Refractories Corporation | Chromic oxide refractories with improved thermal shock resistance |
JPH04354898A (ja) * | 1991-05-31 | 1992-12-09 | Nisshin Steel Co Ltd | ステンレス鋼の脱スケール用中性塩電解浴の成分濃度測定方法 |
JP3385505B2 (ja) * | 1998-05-27 | 2003-03-10 | ティーディーケイ株式会社 | 酸化物磁性体の製造方法 |
JP3550666B2 (ja) * | 2001-10-09 | 2004-08-04 | 独立行政法人物質・材料研究機構 | イリジウム合金の分析方法 |
US7220394B2 (en) * | 2002-10-30 | 2007-05-22 | Council Of Scientific And Industrial Research | Process for simultaneous recovery of chromium and iron from chromite ore processing residue |
CN101424644B (zh) * | 2008-12-12 | 2011-05-04 | 江西稀有稀土金属钨业集团有限公司 | 添加钒或同时添加铬、钒之钨基体中钒含量的测定方法 |
-
2008
- 2008-12-12 CN CN2008102398215A patent/CN101430287B/zh not_active Expired - Fee Related
-
2009
- 2009-12-09 KR KR1020117012339A patent/KR101372067B1/ko not_active IP Right Cessation
- 2009-12-09 WO PCT/CN2009/075418 patent/WO2010066190A1/zh active Application Filing
- 2009-12-09 JP JP2011539881A patent/JP2012511700A/ja active Pending
- 2009-12-09 EP EP09831467.7A patent/EP2360468A4/en not_active Withdrawn
- 2009-12-09 US US13/139,032 patent/US8557594B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1472822A1 (ru) * | 1986-11-11 | 1989-04-15 | Московский институт тонкой химической технологии им.М.В.Ломоносова | Способ определени ванади (ш,1у,у) в твердых материалах |
JPH05142149A (ja) * | 1991-11-18 | 1993-06-08 | Meidensha Corp | 限流素子中のバナジウムの定量分析方法 |
CN101173916A (zh) * | 2007-11-30 | 2008-05-07 | 攀钢集团攀枝花钢铁研究院 | 消除硫酸亚铁铵容量法测定钒时失误的方法 |
CN101430287A (zh) * | 2008-12-12 | 2009-05-13 | 江西稀有稀土金属钨业集团有限公司 | 添加铬或同时添加铬、钒之钨基体中铬含量的测定方法 |
Non-Patent Citations (1)
Title |
---|
LI, HUI LING ET AL.: "Study of Measuring Method for the Mixture Added Chromiun and Vanadium", SICHUAN NONFERROUS METALS, no. 2, June 2007 (2007-06-01), pages 37 - 39, XP008147160 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102279162A (zh) * | 2011-04-25 | 2011-12-14 | 湖北神舟化工有限公司 | 一种有机铬中铬含量的检测方法 |
CN110836888A (zh) * | 2018-08-15 | 2020-02-25 | 张家港市国泰华荣化工新材料有限公司 | 有机硅产品中金属杂质的测定方法 |
CN109870335A (zh) * | 2019-01-29 | 2019-06-11 | 辽宁省农业科学院 | 一种可溶性腐植酸含量快速检测装置和检测方法 |
CN109870335B (zh) * | 2019-01-29 | 2023-09-15 | 辽宁省农业科学院 | 一种可溶性腐植酸含量快速检测装置和检测方法 |
CN110907433A (zh) * | 2019-12-17 | 2020-03-24 | 天津索克汽车试验有限公司 | 一种吸附了钒和钨气态化合物的γ-Al2O3中钒和钨含量的测定方法 |
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JP2012511700A (ja) | 2012-05-24 |
US8557594B2 (en) | 2013-10-15 |
CN101430287B (zh) | 2011-08-10 |
EP2360468A4 (en) | 2014-12-10 |
US20110300634A1 (en) | 2011-12-08 |
CN101430287A (zh) | 2009-05-13 |
EP2360468A1 (en) | 2011-08-24 |
KR101372067B1 (ko) | 2014-03-07 |
KR20110089324A (ko) | 2011-08-05 |
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