JPS569220A - Manufacture of cryolite - Google Patents

Manufacture of cryolite

Info

Publication number
JPS569220A
JPS569220A JP8150979A JP8150979A JPS569220A JP S569220 A JPS569220 A JP S569220A JP 8150979 A JP8150979 A JP 8150979A JP 8150979 A JP8150979 A JP 8150979A JP S569220 A JPS569220 A JP S569220A
Authority
JP
Japan
Prior art keywords
fluoride
cryolite
soln
sodium
sodium aluminate
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
JP8150979A
Other languages
Japanese (ja)
Other versions
JPS5740086B2 (en
Inventor
Yoshiyuki Kobayashi
Tamio Nakamura
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.)
Central Glass Co Ltd
Original Assignee
Central Glass 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 Central Glass Co Ltd filed Critical Central Glass Co Ltd
Priority to JP8150979A priority Critical patent/JPS569220A/en
Priority to FR7919687A priority patent/FR2432995A1/en
Priority to MA18758A priority patent/MA18560A1/en
Priority to DE2932058A priority patent/DE2932058C2/en
Priority to US06/064,363 priority patent/US4251501A/en
Priority to GB7927585A priority patent/GB2028292B/en
Publication of JPS569220A publication Critical patent/JPS569220A/en
Publication of JPS5740086B2 publication Critical patent/JPS5740086B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

PURPOSE: To obtain cryolite with a less fluorine loss and a much less ignition loss by feeding sodium aluminate heated to a predetermined temp. or above into a fluoride soln. and reacting them at a specified temp. or above.
CONSTITUTION: Sodium aluminate heated to ≥90, especially 90W120°C is added to a fluoride soln. which is, e.g., a mixed soln. of sodium fluoride and ammonium fluoride obtd. by the ammonolysis of sodium silicofluoride, and they are reacted at ≥60°C. In this reaction the pH is maintained at 3W12, especially 3W11. The Na2O to Al2O3 molar ratio of the sodium aluminate is ≥1.0, especially about 1.10W1.30. On the other hand, preferred aquivalent ratio (6F/Al) is 1.0W1.2. BY the above-mentioned reaction cryolite with a less ignition loss is obtd.
COPYRIGHT: (C)1981,JPO&Japio
JP8150979A 1978-08-08 1979-06-29 Manufacture of cryolite Granted JPS569220A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP8150979A JPS569220A (en) 1979-06-29 1979-06-29 Manufacture of cryolite
FR7919687A FR2432995A1 (en) 1978-08-08 1979-07-31 PROCESS FOR THE PREPARATION OF HIGH PURITY CRYOLITH FROM A FLUORIDE SOLUTION CONTAINING DISSOLVED SILICA AND PRODUCT THUS OBTAINED
MA18758A MA18560A1 (en) 1978-08-08 1979-08-07 PROCESS FOR THE PREPARATION OF HIGH PURITY CRYOLITE FROM A FLUORIDE SOLUTION CONTAINING DISSOLVED SILICA AND PRODUCT THUS OBTAINED
DE2932058A DE2932058C2 (en) 1978-08-08 1979-08-07 Process for the production of high purity cryolite
US06/064,363 US4251501A (en) 1978-08-08 1979-08-07 Process of preparing high purity cryolite from fluoride solution containing dissolved silica
GB7927585A GB2028292B (en) 1978-08-08 1979-08-08 Process of preparing high purity cryolite from fluoride solution containing dissolved silica

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8150979A JPS569220A (en) 1979-06-29 1979-06-29 Manufacture of cryolite

Publications (2)

Publication Number Publication Date
JPS569220A true JPS569220A (en) 1981-01-30
JPS5740086B2 JPS5740086B2 (en) 1982-08-25

Family

ID=13748319

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8150979A Granted JPS569220A (en) 1978-08-08 1979-06-29 Manufacture of cryolite

Country Status (1)

Country Link
JP (1) JPS569220A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06190373A (en) * 1992-12-25 1994-07-12 Nec Corp Treatment of fluorine in waste water
KR20010097375A (en) * 2000-04-21 2001-11-08 이희창 The method for making goods to use instead for cryolite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06190373A (en) * 1992-12-25 1994-07-12 Nec Corp Treatment of fluorine in waste water
KR20010097375A (en) * 2000-04-21 2001-11-08 이희창 The method for making goods to use instead for cryolite

Also Published As

Publication number Publication date
JPS5740086B2 (en) 1982-08-25

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