JPS5772930A - Removal of deposited palladium - Google Patents

Removal of deposited palladium

Info

Publication number
JPS5772930A
JPS5772930A JP14853180A JP14853180A JPS5772930A JP S5772930 A JPS5772930 A JP S5772930A JP 14853180 A JP14853180 A JP 14853180A JP 14853180 A JP14853180 A JP 14853180A JP S5772930 A JPS5772930 A JP S5772930A
Authority
JP
Japan
Prior art keywords
palladium
reactor
compound
acid
bringing
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
JP14853180A
Other languages
Japanese (ja)
Inventor
Shoji Kitagawa
Akira Kitazawa
Gen Tajima
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.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical 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 Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to JP14853180A priority Critical patent/JPS5772930A/en
Publication of JPS5772930A publication Critical patent/JPS5772930A/en
Pending 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
    • C23G1/10—Other heavy metals
    • C23G1/106—Other heavy metals refractory metals

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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

PURPOSE:In preparing a carbonyl compound by bringing an olefin type unsaturated hydrocarbon and oxygen into contact with a catalyst comprising palladium and copper, to remove deposit witout damaging a reactor and to prevent reduction in function, by washing a palladium-containing material deposited on the reactor to be used with a mixed acid of nitric acid and hydrochloric acid having a specific composition. CONSTITUTION:In preparing a carbonyl compound by bringing an olefin type unsaturated hydrocarbon, e.g., ethylene, etc. as a raw material into contact with oxygen in the presence of a uniform solution catalyst comprising a palladium compound, e.g., palladium chloride, and a compound of poly-valent metal, e.g., iron, copper, or managenese, palladium-containing deposit attached to the inner wall face of a reactor made of tianium in the production device is washed with a mixed acid consisting of >=1wt% nitric acid and 1-30wt%, preferably >=3wt% hydrochloric acid, so that deposited palladium is removed.
JP14853180A 1980-10-22 1980-10-22 Removal of deposited palladium Pending JPS5772930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14853180A JPS5772930A (en) 1980-10-22 1980-10-22 Removal of deposited palladium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14853180A JPS5772930A (en) 1980-10-22 1980-10-22 Removal of deposited palladium

Publications (1)

Publication Number Publication Date
JPS5772930A true JPS5772930A (en) 1982-05-07

Family

ID=15454861

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14853180A Pending JPS5772930A (en) 1980-10-22 1980-10-22 Removal of deposited palladium

Country Status (1)

Country Link
JP (1) JPS5772930A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129391A (en) * 1974-09-06 1976-03-12 Showa Denko Kk
JPS5129392A (en) * 1974-09-06 1976-03-12 Showa Denko Kk

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5129391A (en) * 1974-09-06 1976-03-12 Showa Denko Kk
JPS5129392A (en) * 1974-09-06 1976-03-12 Showa Denko Kk

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