WO1998001393A1 - Verfahren zur herstellung reiner alkali- und/oder ammonium-wolframat-lösungen - Google Patents
Verfahren zur herstellung reiner alkali- und/oder ammonium-wolframat-lösungen Download PDFInfo
- Publication number
- WO1998001393A1 WO1998001393A1 PCT/EP1997/003438 EP9703438W WO9801393A1 WO 1998001393 A1 WO1998001393 A1 WO 1998001393A1 EP 9703438 W EP9703438 W EP 9703438W WO 9801393 A1 WO9801393 A1 WO 9801393A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- molybdenum
- arsenic
- solution
- tungsten
- precipitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G41/00—Compounds of tungsten
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G39/00—Compounds of molybdenum
- C01G39/06—Sulfides
Definitions
- the present invention relates to a process for producing pure alkali and / or ammonium tungstate solutions from alkaline tungsten solutions contaminated with, in particular, silicon, phosphorus, arsenic, tin, antimony, vanadium, tantalum, niobium, titanium and molybdenum, the solution is acidified and then the precipitate formed without the addition of precipitation or precipitation aids is filtered.
- the solutions from the various digestion processes containing tungsten are contaminated with a number of different elements.
- the most common impurities besides molybdenum are phosphorus, arsenic, silicon, aluminum, vanadium, titanium, niobium and tantalum.
- Various precipitation processes are known for removing these impurities, the pH value of the previously strongly alkaline tungstate solution being reduced to values between 8 and 11 after addition of precipitation agents such as magnesium chloride or sulfate or precipitation aids such as aluminum sulfate.
- precipitation processes cannot be carried out quantitatively, in particular the arsenic remains largely in solution (Tungsten Symposium, San Francisco, June 1982, p. 77, Table 2).
- Such a precipitation product can hardly be used to advantage and therefore often has to be disposed of as special waste. Furthermore, the pH can only be adjusted with mineral acids, with large amounts of neutral salt being produced.
- the molybdenum is separated off as MoS 4 2 " by extraction with quaternary ammonium compounds at pH values between 7 and 9.
- arsenic is also extracted under these conditions, it can be separated from tungsten, but not from molybdenum. Since the stripping of the MoS ⁇ 2- is only possible using oxidative additives such as H 2 O 2 or NaOCl, there is no separation from the co-extracted tungsten, which increases the W losses. All that is obtained is a mixture of sodium molybdate and tungstate that is difficult to use and that is still contaminated with arsenic.
- the object of the present invention is to provide a method which makes it possible to selectively free contaminants from tungstate solutions, but at the same time to generate as little waste as possible, in particular hazardous waste.
- An economically usable molybdenum product should be able to be generated from the Mo contents.
- the present invention relates to a process for producing pure alkali and / or ammonium tungstate solutions from alkaline tungsten solutions contaminated with, in particular, silicon, phosphorus, arsenic, tin, antimony, vanadium, tantalum, niobium, titanium and molybdenum, the solution being acidified and then the precipitate formed without the addition of precipitation or precipitation aids is filtered, which is characterized in that the acidification is carried out up to a pH range of 7 to 10, the impurities mainly with the exception of the molybdenum and arsenic Ions are precipitated and filtered off, the remaining part of the impurities including the arsenic with the exception of the molybdenum ions are separated from the filtrate by means of a weak to medium base ion exchanger, this filtrate is mixed with sulfides to form thiomolybdate data and
- Acidification up to a pH range of 7 to 10 is preferably carried out using mineral acid (s), CO 2 and / or membrane electrolysis.
- a pH of 8 to 8.5 is preferably set here.
- a precipitation is inevitable. This precipitation can be carried out without the addition of precipitation or precipitation aids.
- the first exchange step then takes place using the weakly to medium-based ion exchanger.
- a weakly to moderately basic, solid ion exchanger in the OH form is preferably used here, that is to say an ion exchanger which predominantly has tertiary ammonium groups as active components. This exchange step removes arsenic, phosphorus, silicon, vanadium, titanium, niobium and
- the process according to the invention can advantageously be used starting from alkaline solutions from the various digestion processes (such as, for example, autoclave, melt, calcination). Tungsten contents of 80 to 100 g / l are preferably set here.
- a further cleaning with a weakly basic anion exchanger can advantageously be carried out in order to achieve the separation of the residual impurities after the precipitation, as well as the arsenic and the phosphorus.
- the solution pre-cleaned in this way is then advantageously mixed with 3 to 5 times the stoichiometric amount, based on the molybdenum, with sulfides to form the thiomolybdates. H 2 S are preferred as sulfides,
- NaHS, Na ⁇ (NH 4 ) 2 S or sulfide-releasing organic compounds are used.
- This solution is preferably stirred for several hours, preferably 4 to 10 hours, at elevated temperature, preferably 50 to 95 ° C., the pH value being advantageously adjusted to values from 8 to 8.5 using mineral acid or CO 2 .
- This solution is then advantageously passed in an upflow over an exchange column with a weakly basic anion exchanger, the weakly basic anion exchanger having previously been treated with H 2 S water to pH ⁇ 7 to form the sulfide form.
- the breakthrough begins.
- the loading process is then ended, the exchanger is washed largely free of tungstate and then eluted with dilute sodium hydroxide solution.
- the exchanger is then washed with water. Elution and washing are preferably carried out downstream.
- the eluted exchanger is then re-formed with H 2 S water from the scrubber to pH ⁇ 7 and is thus prepared for the next cycle.
- the cleaned tungstate solution can be further acidified with mineral acid, CO 2 or membrane electrolysis and processed further using known methods. After using an extraction process, the tungsten content can be further processed to ammonium paratungstate.
- the molybdenum-containing eluate is preferably adjusted to a pH of 2 to 3 with mineral acid, the molybdenum then being precipitated as MoS 3 . Due to the previous cleaning of the arsenic from the tungsten solutions by means of the first exchange step, this MoS 3 is pure, contains only a little tungsten and can be used in molybdenum metallurgy.
- the H 2 S gas formed during the acidification of the tungstate solutions and the eluates is preferably collected by means of gas scrubbers with H 2 O and used to form the anion exchanger.
- the solution was passed up through the exchange column at 0.5 bed volume per hour (150 ml / h).
- 0.5 l of the eluate was adjusted to pH 2 with 35 ml of semi-concentrated H 2 SO 4 , stirred at 70 ° C. for about 3 hours, suction filtered, washed and dried.
- the solution was passed up through the exchange column at 0.5 bed volume (BV) per hour (150 ml / h).
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Catalysts (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0906397A AT408543B (de) | 1996-07-05 | 1997-07-01 | Verfahren zur herstellung reiner alkali- und/oder ammonium-wolframat-lösungen |
| JP10504731A JP2000514030A (ja) | 1996-07-05 | 1997-07-01 | 純粋なアルカリ金属および/またはアンモニウムのタングステン酸塩の製造法 |
| HK00100671.6A HK1021727B (en) | 1996-07-05 | 1997-07-01 | Process for preparing pure alkali and/or ammonium tungstate solutions |
| US09/214,284 US6113868A (en) | 1996-07-05 | 1997-07-01 | Process for treating tungstate solutions to reduce molybdenum impurity and other impurity content |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19627063 | 1996-07-05 | ||
| DE19627063.4 | 1996-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998001393A1 true WO1998001393A1 (de) | 1998-01-15 |
Family
ID=7798991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1997/003438 Ceased WO1998001393A1 (de) | 1996-07-05 | 1997-07-01 | Verfahren zur herstellung reiner alkali- und/oder ammonium-wolframat-lösungen |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6113868A (de) |
| JP (1) | JP2000514030A (de) |
| CN (1) | CN1071716C (de) |
| AT (1) | AT408543B (de) |
| CA (1) | CA2259461A1 (de) |
| DE (1) | DE19724183C2 (de) |
| WO (1) | WO1998001393A1 (de) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10341727A1 (de) * | 2003-09-10 | 2005-04-28 | Starck H C Gmbh | Reinigung von Ammoniummetallat-Lösungen |
| DE102007005287B4 (de) | 2007-02-02 | 2009-10-01 | H.C. Starck Gmbh | Verfahren zur Herstellung von Ammoniumparawolframattetrahydrat und hochreines Ammoniumparawolframattetrahydrat |
| CN101177303B (zh) * | 2007-11-02 | 2010-06-02 | 北京有色金属研究总院 | 一种从钨酸盐溶液中除钼、砷、锑、锡的方法 |
| CN101333598B (zh) * | 2008-01-17 | 2010-07-21 | 郴州钻石钨制品有限责任公司 | 一种从钨冶炼产生的除钼渣中分离提取金属钨、钼的方法 |
| JP5636142B2 (ja) * | 2009-03-02 | 2014-12-03 | 三菱マテリアル株式会社 | 高純度パラタングステン酸アンモニウムの製造方法 |
| JP5368834B2 (ja) * | 2009-03-11 | 2013-12-18 | 国立大学法人名古屋大学 | タングステン酸アンモニウム水溶液の製造方法 |
| CN101565778B (zh) * | 2009-05-22 | 2011-02-09 | 中南大学 | 一种从钨酸盐和钼酸盐的混合溶液中沉淀分离钨钼的方法 |
| JP5538953B2 (ja) * | 2010-02-26 | 2014-07-02 | 三菱マテリアル株式会社 | タングステン酸ナトリウム溶液の精製方法 |
| JP5624705B2 (ja) * | 2010-02-26 | 2014-11-12 | 三菱マテリアル株式会社 | タングステン酸アンモニウム溶液の製造方法 |
| CN102781841B (zh) * | 2010-03-05 | 2015-07-01 | 国立大学法人名古屋大学 | 钨酸铵水溶液的制备方法 |
| JP5662690B2 (ja) * | 2010-03-05 | 2015-02-04 | 国立大学法人名古屋大学 | タングステン酸アンモニウム水溶液の製造方法 |
| CN102381728A (zh) * | 2010-09-03 | 2012-03-21 | 中芯国际集成电路制造(上海)有限公司 | 提高钨酸铵储备溶液稳定性的方法及碱性的钨酸铵组合物 |
| CN102140578B (zh) * | 2011-03-07 | 2013-01-16 | 中南大学 | 钨湿法冶金中钼钨混合铵盐溶液的钼钨分离工艺 |
| JP5804275B2 (ja) * | 2012-03-17 | 2015-11-04 | 三菱マテリアル株式会社 | タングステン含有アルカリ溶液の精製方法 |
| JP2014221716A (ja) * | 2014-07-11 | 2014-11-27 | 国立大学法人名古屋大学 | タングステン酸アンモニウム水溶液の製造方法 |
| JP2014208592A (ja) * | 2014-07-11 | 2014-11-06 | 国立大学法人名古屋大学 | タングステン酸アンモニウム水溶液の製造方法 |
| CN104263976B (zh) * | 2014-10-09 | 2016-07-27 | 江西稀有金属钨业控股集团有限公司 | 全程无污染排放的钨矿物原料冶金工艺 |
| CN104294045B (zh) * | 2014-11-05 | 2016-10-05 | 中南大学 | 含钒钨酸盐溶液深度除钒的方法 |
| CN106517334A (zh) * | 2016-08-24 | 2017-03-22 | 宇辰新能源材料科技无锡有限公司 | 一种六棱柱形钨酸盐的制备方法 |
| CN108588417B (zh) * | 2018-01-26 | 2019-09-27 | 中南大学 | 一种从钨酸盐溶液中萃取分离钼的方法 |
| CN113801997A (zh) * | 2020-06-12 | 2021-12-17 | 杭州临安慧尔钼业科技有限公司 | 一种低钼萃余液钼回收生产钼酸铵及沉钼剂循环再利用的方法 |
| CN113802020B (zh) * | 2021-10-21 | 2025-03-11 | 江西钨业股份有限公司 | 钨酸盐溶液的深度除锑的方法 |
| CN114855000B (zh) * | 2022-04-28 | 2023-08-22 | 湖北绿钨资源循环有限公司 | 一种钨冶炼过程中钨、钼分离除杂的方法 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3173754A (en) * | 1962-09-19 | 1965-03-16 | Union Carbide Corp | Separation of molybdenum from tungsten values |
| US4278642A (en) * | 1979-05-14 | 1981-07-14 | Gte Products Corporation | Method for removing molybdenum from tungstate solutions by solvent extraction |
| DE19500057C1 (de) * | 1995-01-03 | 1996-02-29 | Starck H C Gmbh Co Kg | Verfahren zur Herstellung von reinen Wolframat- und/oder Molybdat-Lösungen |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320245B2 (de) * | 1974-03-22 | 1978-06-26 | ||
| US4115513A (en) * | 1977-08-16 | 1978-09-19 | Westinghouse Electric Corp. | Processing of ammonium paratungstate from tungsten ores |
| US4288413A (en) * | 1979-05-14 | 1981-09-08 | Gte Products Corporation | Separating molybdenum values from an aqueous solution containing tungsten by solvent extraction |
| ZA803651B (en) * | 1979-06-22 | 1981-06-24 | Boart Int Ltd | Molybdenum precipitation |
| US4279869A (en) * | 1979-12-13 | 1981-07-21 | Kerr-Mcgee Corporation | Process for recovering concentrated, purified tungsten values from brine |
| HU203132B (en) * | 1985-10-15 | 1991-05-28 | Mta Mueszaki Fiz Kutato Inteze | Process for producing purified volfram and/or molybden isopolyacids or salts from impure alkalic volfram and/or molybden metal-salt solutions |
| SU1797290A1 (ru) * | 1991-04-03 | 1996-04-20 | Ленинградский Технологический Институт Им.Ленсовета | Способ очистки растворов вольфрамата аммония от молибдена |
| DE19521332A1 (de) * | 1995-06-12 | 1996-12-19 | Starck H C Gmbh Co Kg | Verfahren zur Herstellung reiner Ammoniummetallate |
| US5891407A (en) * | 1996-05-30 | 1999-04-06 | H.C. Starck Gmbh & Co. Kg | Process for producing pure ammonium metallates |
-
1997
- 1997-06-09 DE DE19724183A patent/DE19724183C2/de not_active Expired - Fee Related
- 1997-07-01 CN CN97196169A patent/CN1071716C/zh not_active Expired - Fee Related
- 1997-07-01 WO PCT/EP1997/003438 patent/WO1998001393A1/de not_active Ceased
- 1997-07-01 CA CA002259461A patent/CA2259461A1/en not_active Abandoned
- 1997-07-01 US US09/214,284 patent/US6113868A/en not_active Expired - Fee Related
- 1997-07-01 AT AT0906397A patent/AT408543B/de not_active IP Right Cessation
- 1997-07-01 JP JP10504731A patent/JP2000514030A/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3173754A (en) * | 1962-09-19 | 1965-03-16 | Union Carbide Corp | Separation of molybdenum from tungsten values |
| US4278642A (en) * | 1979-05-14 | 1981-07-14 | Gte Products Corporation | Method for removing molybdenum from tungstate solutions by solvent extraction |
| DE19500057C1 (de) * | 1995-01-03 | 1996-02-29 | Starck H C Gmbh Co Kg | Verfahren zur Herstellung von reinen Wolframat- und/oder Molybdat-Lösungen |
Non-Patent Citations (2)
| Title |
|---|
| CHEMICAL ABSTRACTS, vol. 104, no. 12, 24 March 1986, Columbus, Ohio, US; abstract no. 91455g, FLEMING page 171; XP002044818 * |
| MINTEK, 1985, pages m226 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ATA906397A (de) | 2001-05-15 |
| JP2000514030A (ja) | 2000-10-24 |
| CN1071716C (zh) | 2001-09-26 |
| HK1021727A1 (en) | 2000-06-30 |
| CN1225075A (zh) | 1999-08-04 |
| US6113868A (en) | 2000-09-05 |
| CA2259461A1 (en) | 1998-01-15 |
| DE19724183C2 (de) | 1999-03-25 |
| AT408543B (de) | 2001-12-27 |
| DE19724183A1 (de) | 1998-01-08 |
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