JPS55165192A - Scale removing method - Google Patents

Scale removing method

Info

Publication number
JPS55165192A
JPS55165192A JP7267779A JP7267779A JPS55165192A JP S55165192 A JPS55165192 A JP S55165192A JP 7267779 A JP7267779 A JP 7267779A JP 7267779 A JP7267779 A JP 7267779A JP S55165192 A JPS55165192 A JP S55165192A
Authority
JP
Japan
Prior art keywords
acid
scale
damaging
liquid
ion
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
JP7267779A
Other languages
Japanese (ja)
Other versions
JPS6252634B2 (en
Inventor
Masayoshi Kotake
Toshiki Mori
Iwao Yashima
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.)
Nissan Chemical Corp
Original Assignee
Nissan Chemical Corp
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 Nissan Chemical Corp filed Critical Nissan Chemical Corp
Priority to JP7267779A priority Critical patent/JPS55165192A/en
Publication of JPS55165192A publication Critical patent/JPS55165192A/en
Publication of JPS6252634B2 publication Critical patent/JPS6252634B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

PURPOSE: To completely dissolve and remove the scale without damaging the evaporator, by using aqueous solution coexisting the anion of organic acid and Al ion, on occasion of removing the scale stuck on the inner wall of black liquid evaporator at the process of manufacturing pulp by chemical ground method etc.
CONSTITUTION: Lowering of heat transmission efficiency of concentrator made of stainless steel of concentration apparatus, is prevented, by removing the scale stuck on the inner wall of black liquid side of evaporation concentration apparatus which is produced by exhaust liquid from digesting apparatus, at the time of manufacturing pulp by chemical ground method or semichemical method. For that reason, aqueous solution containing anion of one kind or two kinds or more of organic acid, such as formic acid, acetic acid, glycolic acid, oxalic acid, lactic acid, malonic acid, malic acid, tartaric acid, gluconic acid, citric acid etc. and Al ion by dissolving Al(OH)3, are used as the liquid for scale dissolution at 50W70°C. The scale is completely and rapidly dissolved and removed without damaging the groundwork of the concentrator.
COPYRIGHT: (C)1980,JPO&Japio
JP7267779A 1979-06-09 1979-06-09 Scale removing method Granted JPS55165192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7267779A JPS55165192A (en) 1979-06-09 1979-06-09 Scale removing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7267779A JPS55165192A (en) 1979-06-09 1979-06-09 Scale removing method

Publications (2)

Publication Number Publication Date
JPS55165192A true JPS55165192A (en) 1980-12-23
JPS6252634B2 JPS6252634B2 (en) 1987-11-06

Family

ID=13496228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7267779A Granted JPS55165192A (en) 1979-06-09 1979-06-09 Scale removing method

Country Status (1)

Country Link
JP (1) JPS55165192A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62141187A (en) * 1985-12-12 1987-06-24 株式会社パ−マケム・アジア Detergent for papermaking process
GB2309980A (en) * 1996-02-06 1997-08-13 Abbey Treating ferrous surface with gluconate and citrate salts
CN106083569A (en) * 2016-06-12 2016-11-09 日照金禾博源生化有限公司 A kind of preparation method of specified particle size anhydrous citric acid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01154238U (en) * 1988-04-19 1989-10-24

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62141187A (en) * 1985-12-12 1987-06-24 株式会社パ−マケム・アジア Detergent for papermaking process
JPH0141757B2 (en) * 1985-12-12 1989-09-07 Permachem Asia Ltd
GB2309980A (en) * 1996-02-06 1997-08-13 Abbey Treating ferrous surface with gluconate and citrate salts
GB2309980B (en) * 1996-02-06 1998-12-16 Abbey Treatment of ferrous metal surfaces
US5916379A (en) * 1996-02-06 1999-06-29 Abbey Research & Development Ltd. Treatment of ferrous metal surfaces
CN106083569A (en) * 2016-06-12 2016-11-09 日照金禾博源生化有限公司 A kind of preparation method of specified particle size anhydrous citric acid

Also Published As

Publication number Publication date
JPS6252634B2 (en) 1987-11-06

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