JPS5761632A - Production of crude particles of ammonium paratungstenate crystal - Google Patents

Production of crude particles of ammonium paratungstenate crystal

Info

Publication number
JPS5761632A
JPS5761632A JP13675480A JP13675480A JPS5761632A JP S5761632 A JPS5761632 A JP S5761632A JP 13675480 A JP13675480 A JP 13675480A JP 13675480 A JP13675480 A JP 13675480A JP S5761632 A JPS5761632 A JP S5761632A
Authority
JP
Japan
Prior art keywords
ammonium
paratungstenate
concentration
solution
tungstenate
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.)
Granted
Application number
JP13675480A
Other languages
Japanese (ja)
Other versions
JPS6127328B2 (en
Inventor
Motoo Kiyomiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13675480A priority Critical patent/JPS5761632A/en
Publication of JPS5761632A publication Critical patent/JPS5761632A/en
Publication of JPS6127328B2 publication Critical patent/JPS6127328B2/ja
Granted legal-status Critical Current

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  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

PURPOSE: In the concentration and crystallization processes for an ammonium tungstenate solution, they are effected in the presence of an excessive amount of ammonia to enable the production of large crystals of ammonium paratungstenate.
CONSTITUTION: In order to produce WO3 as a raw material for metallic tungsten in high productivity, large particles of ammonium paratungstenate of 100W250 mesh crystal sizes are thermally decomposed. Then, an aqueous ammonium tungstenate solution of 30W75g/l excess ammonia concentration and 300W370g/l tungstenate concentration, calculated as WO3, is charged in a concentration tank and stirred at 90W100°C to effect concentration and crystallization. At this time, the solution is fed at almost the same rate as the reduction rate of the solution by evaporation to enable the crystals of ammonium paratungstenate to form large particles.
COPYRIGHT: (C)1982,JPO&Japio
JP13675480A 1980-10-02 1980-10-02 Production of crude particles of ammonium paratungstenate crystal Granted JPS5761632A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13675480A JPS5761632A (en) 1980-10-02 1980-10-02 Production of crude particles of ammonium paratungstenate crystal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13675480A JPS5761632A (en) 1980-10-02 1980-10-02 Production of crude particles of ammonium paratungstenate crystal

Publications (2)

Publication Number Publication Date
JPS5761632A true JPS5761632A (en) 1982-04-14
JPS6127328B2 JPS6127328B2 (en) 1986-06-25

Family

ID=15182711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13675480A Granted JPS5761632A (en) 1980-10-02 1980-10-02 Production of crude particles of ammonium paratungstenate crystal

Country Status (1)

Country Link
JP (1) JPS5761632A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010517903A (en) * 2007-02-02 2010-05-27 ハー．ツェー．スタルク ゲゼルシャフト ミット ベシュレンクテル ハフツング Process for producing ammonium paratungstate tetrahydrate and high purity ammonium paratungstate tetrahydrate
JP2010229017A (en) * 2009-03-02 2010-10-14 Mitsubishi Materials Corp Method for producing high-purity ammonium paratungstate
CN113816429A (en) * 2021-11-12 2021-12-21 江西钨业股份有限公司 Method for coarsening particles of ammonium paratungstate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010517903A (en) * 2007-02-02 2010-05-27 ハー．ツェー．スタルク ゲゼルシャフト ミット ベシュレンクテル ハフツング Process for producing ammonium paratungstate tetrahydrate and high purity ammonium paratungstate tetrahydrate
JP2010229017A (en) * 2009-03-02 2010-10-14 Mitsubishi Materials Corp Method for producing high-purity ammonium paratungstate
CN113816429A (en) * 2021-11-12 2021-12-21 江西钨业股份有限公司 Method for coarsening particles of ammonium paratungstate

Also Published As

Publication number Publication date
JPS6127328B2 (en) 1986-06-25

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