JPS56149316A - Purifying method for sodium sulfate solution - Google Patents

Purifying method for sodium sulfate solution

Info

Publication number
JPS56149316A
JPS56149316A JP4957080A JP4957080A JPS56149316A JP S56149316 A JPS56149316 A JP S56149316A JP 4957080 A JP4957080 A JP 4957080A JP 4957080 A JP4957080 A JP 4957080A JP S56149316 A JPS56149316 A JP S56149316A
Authority
JP
Japan
Prior art keywords
soln
sodium sulfate
salt
contg
high purity
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
JP4957080A
Other languages
Japanese (ja)
Other versions
JPS5835930B2 (en
Inventor
Tomio Fujikawa
Nobuo Kuno
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 JP55049570A priority Critical patent/JPS5835930B2/en
Publication of JPS56149316A publication Critical patent/JPS56149316A/en
Publication of JPS5835930B2 publication Critical patent/JPS5835930B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Treating Waste Gases (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE: To manufacture high purity sodium sulfate by adding a ferrous salt to an aqueous sodium sulfate soln. contg. heavy metals such as V to allow the metals to be adsorbed and adding a soluble Ca salt after adjusting the pH of the soln.
CONSTITUTION: When exhaust gas from the combustion of heavy oil or the like is desulfurized by passing through a caustic soda soln. to convert contained SO2 into Na2SO3, an aqueous sodium sulfate soln. contg. heavy metals such as V contained in the exhaust gas is prepared after the desulfurization. To the sodium sulfate soln. contg. heavy metals as impurities is added a ferrous salt such as ferrous sulfate, and the pH of the soln. is adjusted to ≤3.5 with a mineral acid such as sulfuric acid. After adjusting the pH to 5W7 with an alkali substance such as milk of lime, the soln. is held for 10min once, and milk of lime is further added to adjust the pH to ≥10. A Ca salt such as CaCl2 is then added to the soln. to form a precipitate based on iron hydroxide with V adsorbed and having superior settleability and filterability. By separating the precipitate by filtration, an aqueous sodium sulfate soln. of high purity is obtd., and high purity sodium sulfate is manufactured from the soln.
COPYRIGHT: (C)1981,JPO&Japio
JP55049570A 1980-04-17 1980-04-17 Method for purifying mirabilite solution Expired JPS5835930B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55049570A JPS5835930B2 (en) 1980-04-17 1980-04-17 Method for purifying mirabilite solution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55049570A JPS5835930B2 (en) 1980-04-17 1980-04-17 Method for purifying mirabilite solution

Publications (2)

Publication Number Publication Date
JPS56149316A true JPS56149316A (en) 1981-11-19
JPS5835930B2 JPS5835930B2 (en) 1983-08-05

Family

ID=12834861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55049570A Expired JPS5835930B2 (en) 1980-04-17 1980-04-17 Method for purifying mirabilite solution

Country Status (1)

Country Link
JP (1) JPS5835930B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668124A (en) * 1985-04-22 1987-05-26 Engelhard Corporation Disposal of material containing vanadium as landfill
CN103214077A (en) * 2013-04-26 2013-07-24 何京明 Preparation method of byproduct high-purity calcium sulphate by deep purification of nitrate aqueous solution

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668124A (en) * 1985-04-22 1987-05-26 Engelhard Corporation Disposal of material containing vanadium as landfill
CN103214077A (en) * 2013-04-26 2013-07-24 何京明 Preparation method of byproduct high-purity calcium sulphate by deep purification of nitrate aqueous solution

Also Published As

Publication number Publication date
JPS5835930B2 (en) 1983-08-05

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