GB1151649A - Removal of Ferrous Sulfide Deposits - Google Patents

Removal of Ferrous Sulfide Deposits

Info

Publication number
GB1151649A
GB1151649A GB4717767A GB4717767A GB1151649A GB 1151649 A GB1151649 A GB 1151649A GB 4717767 A GB4717767 A GB 4717767A GB 4717767 A GB4717767 A GB 4717767A GB 1151649 A GB1151649 A GB 1151649A
Authority
GB
United Kingdom
Prior art keywords
thiourea
weight
copper
ferrous
cupric
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.)
Expired
Application number
GB4717767A
Inventor
Fred Norman Teumac
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Priority to GB4717767A priority Critical patent/GB1151649A/en
Publication of GB1151649A publication Critical patent/GB1151649A/en
Expired 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
    • C23G1/08—Iron or steel

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)
  • ing And Chemical Polishing (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

1,151,649. Cleaning ferrous surfaces. DOW CHEMICAL CO. Oct. 17, 1967, No. 47177/67. Heading C7E. Ferrous sulphide is removed from ferrous surfaces by treating with an aqueous solution containing 1-10% by weight of HCl and/or H 2 SO 4 , 0À1-1% by weight of copper ion, and at least one thiourea compound selected from thiourea, 1, 3 dimethyl thiourea, 1, 3 diethyl thiourea, alkyl thiourea, ethylene thiourea, 1, 3 diisopropyl thiourea, the thiorea compound being present in an amount equivalent to an amount of thiourea from 2-20 times the weight of copper ion. Suitable copper salts for providing the copper ions are copper sulphate, cupric nitrate, cupric acetate and cupric chloride. Treatment is effected at ambient temperatures and preferably at pressures above atmospheric.
GB4717767A 1967-10-17 1967-10-17 Removal of Ferrous Sulfide Deposits Expired GB1151649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4717767A GB1151649A (en) 1967-10-17 1967-10-17 Removal of Ferrous Sulfide Deposits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4717767A GB1151649A (en) 1967-10-17 1967-10-17 Removal of Ferrous Sulfide Deposits

Publications (1)

Publication Number Publication Date
GB1151649A true GB1151649A (en) 1969-05-14

Family

ID=10444028

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4717767A Expired GB1151649A (en) 1967-10-17 1967-10-17 Removal of Ferrous Sulfide Deposits

Country Status (1)

Country Link
GB (1) GB1151649A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224750A (en) * 1988-09-26 1990-05-16 Fuji Xerox Co Ltd Method for removing a selenium-containing layer from an electrophotographic photoreceptor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224750A (en) * 1988-09-26 1990-05-16 Fuji Xerox Co Ltd Method for removing a selenium-containing layer from an electrophotographic photoreceptor
US5085732A (en) * 1988-09-26 1992-02-04 Fuji Xerox Co., Ltd. Method for removing a selenium-containing layer from a electrophotographic photoreceptor
GB2224750B (en) * 1988-09-26 1992-12-02 Fuji Xerox Co Ltd Method for removing a selenium-containing layer from an electrophotographic photoreceptor

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees