JPS55155785A - Treating method of waste water containing borofluoride - Google Patents

Treating method of waste water containing borofluoride

Info

Publication number
JPS55155785A
JPS55155785A JP6259979A JP6259979A JPS55155785A JP S55155785 A JPS55155785 A JP S55155785A JP 6259979 A JP6259979 A JP 6259979A JP 6259979 A JP6259979 A JP 6259979A JP S55155785 A JPS55155785 A JP S55155785A
Authority
JP
Japan
Prior art keywords
waste water
hydroxide
water containing
containing borofluoride
treating method
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.)
Pending
Application number
JP6259979A
Other languages
Japanese (ja)
Inventor
Masayoshi Saito
Masaru 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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6259979A priority Critical patent/JPS55155785A/en
Publication of JPS55155785A publication Critical patent/JPS55155785A/en
Pending legal-status Critical Current

Links

Landscapes

  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE: To reduce the escaping amount of F2 and perform evaporation and concentration efficiently without producing any scale by adding the hydroxide of alkaline (earth) metals to the waste water containing borofluoride from solder plating bath or the like, controlling the same to the specific pH and separating the hydroxide then evaporating and concentrating the solution.
CONSTITUTION: The hydroxide of alkaline (earth) metals (for example, NaOH, KOH) is added to the waste water containing borofluoride from solder plating bath or the like and its pH is controlled to 8 or more. Next, the hydroxide formed is separated away, after which the waste water is evaporated and concentrated. According to this method, no scale is generated in the concentrated solution and therefore the efficiency of evaporation-concentration treatment may be improved and further the F2 escaping amount in the evaporating vapor may be decreased.
COPYRIGHT: (C)1980,JPO&Japio
JP6259979A 1979-05-23 1979-05-23 Treating method of waste water containing borofluoride Pending JPS55155785A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6259979A JPS55155785A (en) 1979-05-23 1979-05-23 Treating method of waste water containing borofluoride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6259979A JPS55155785A (en) 1979-05-23 1979-05-23 Treating method of waste water containing borofluoride

Publications (1)

Publication Number Publication Date
JPS55155785A true JPS55155785A (en) 1980-12-04

Family

ID=13204945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6259979A Pending JPS55155785A (en) 1979-05-23 1979-05-23 Treating method of waste water containing borofluoride

Country Status (1)

Country Link
JP (1) JPS55155785A (en)

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