JPS565318A - Preparing hard type dense ash - Google Patents

Preparing hard type dense ash

Info

Publication number
JPS565318A
JPS565318A JP7806779A JP7806779A JPS565318A JP S565318 A JPS565318 A JP S565318A JP 7806779 A JP7806779 A JP 7806779A JP 7806779 A JP7806779 A JP 7806779A JP S565318 A JPS565318 A JP S565318A
Authority
JP
Japan
Prior art keywords
sodium carbonate
solution
precipitated
hard type
calcium
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
JP7806779A
Other languages
Japanese (ja)
Other versions
JPS5730807B2 (en
Inventor
Keiichi Nakaya
Koji Kawanami
Sueichi Hirata
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.)
AGC Inc
Original Assignee
Asahi 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 Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to JP7806779A priority Critical patent/JPS565318A/en
Publication of JPS565318A publication Critical patent/JPS565318A/en
Publication of JPS5730807B2 publication Critical patent/JPS5730807B2/ja
Granted legal-status Critical Current

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  • Processing Of Solid Wastes (AREA)

Abstract

PURPOSE: To easily provide hard type soda ash by calcining sodium carbonate monohydrate precipitated from aqueous sodium carbonate solution in the presence of sodium sulfite and calcium ions.
CONSTITUTION: Sodium carbonate hydrate is precipitated from aqueous sodium carbonate solution in the presence of sodium sulfite and calcium ions. The precipitated sodium carbonate hydrate is calcined. The above aqueous sodium carbonate solution is preferably obtained by carbonating caustic soda obtained by electrolysis of NaCl solution in such a way that the above caustic soda solution is added with CO2-contg. gas, SO2-contg. gas, and an ion-dissociable calcium cpd. In this method, preferable condition is that precipitation temperature of sodium carbonate hydrate is 50W110°C, the concentration of sodium sulfite is 0.2W5.5wt% of saturated aqueous solution of sodium carbonate, calcium ion concentration is 5W30ppm on the basis of converted CaO.
COPYRIGHT: (C)1981,JPO&Japio
JP7806779A 1979-06-22 1979-06-22 Preparing hard type dense ash Granted JPS565318A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7806779A JPS565318A (en) 1979-06-22 1979-06-22 Preparing hard type dense ash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7806779A JPS565318A (en) 1979-06-22 1979-06-22 Preparing hard type dense ash

Publications (2)

Publication Number Publication Date
JPS565318A true JPS565318A (en) 1981-01-20
JPS5730807B2 JPS5730807B2 (en) 1982-07-01

Family

ID=13651490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7806779A Granted JPS565318A (en) 1979-06-22 1979-06-22 Preparing hard type dense ash

Country Status (1)

Country Link
JP (1) JPS565318A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5429733A (en) * 1992-05-21 1995-07-04 Electroplating Engineers Of Japan, Ltd. Plating device for wafer
US5447615A (en) * 1994-02-02 1995-09-05 Electroplating Engineers Of Japan Limited Plating device for wafer
WO2007144973A1 (en) * 2006-06-16 2007-12-21 Tsurumi Soda Co., Ltd. Method for purification of alkali metal carbonate solutions, purification apparatus and alkali metal carbonate solutions

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5429733A (en) * 1992-05-21 1995-07-04 Electroplating Engineers Of Japan, Ltd. Plating device for wafer
US5447615A (en) * 1994-02-02 1995-09-05 Electroplating Engineers Of Japan Limited Plating device for wafer
WO2007144973A1 (en) * 2006-06-16 2007-12-21 Tsurumi Soda Co., Ltd. Method for purification of alkali metal carbonate solutions, purification apparatus and alkali metal carbonate solutions
JP2007331993A (en) * 2006-06-16 2007-12-27 Tsurumi Soda Co Ltd Method for purifying alkali metal carbonate solution, purification apparatus, and alkali metal carbonate solution

Also Published As

Publication number Publication date
JPS5730807B2 (en) 1982-07-01

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