NL6814752A - Regeneration of pd-catalyst poisoned by co impurities - from h2 used for catalytically reducing no3-ions to - Google Patents

Regeneration of pd-catalyst poisoned by co impurities - from h2 used for catalytically reducing no3-ions to

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Publication number
NL6814752A
NL6814752A NL6814752A NL6814752A NL6814752A NL 6814752 A NL6814752 A NL 6814752A NL 6814752 A NL6814752 A NL 6814752A NL 6814752 A NL6814752 A NL 6814752A NL 6814752 A NL6814752 A NL 6814752A
Authority
NL
Netherlands
Prior art keywords
regeneration
impurities
ions
poisoned
catalyst
Prior art date
Application number
NL6814752A
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 filed Critical
Priority to NL6814752A priority Critical patent/NL6814752A/en
Publication of NL6814752A publication Critical patent/NL6814752A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/90—Regeneration or reactivation
    • B01J23/96—Regeneration or reactivation of catalysts comprising metals, oxides or hydroxides of the noble metals
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
    • C01B21/14—Hydroxylamine; Salts thereof
    • C01B21/1409—Preparation
    • C01B21/1418—Preparation by catalytic reduction of nitrogen oxides or nitrates with hydrogen
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/584—Recycling of catalysts

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

Regeneration of Pd-catalyst poisoned by CO impurities from H2 used for catalytically reducing NO3-ions to NH2OH N6A. Involves treating a suspension of the largely inactivated Pd catalyst (I) in the normal reaction medium with O2 or O2-containing gas, especially air, generally at 20-60 degrees C, pH 0-3, under atmospheric- or elevated pressure. Hydrogen gas purification systems do break down at times in which case the costly (I) must be renewed. The new procedure allows the poisoned (II) to be reactivated in 1 hr.
NL6814752A 1968-10-15 1968-10-15 Regeneration of pd-catalyst poisoned by co impurities - from h2 used for catalytically reducing no3-ions to NL6814752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL6814752A NL6814752A (en) 1968-10-15 1968-10-15 Regeneration of pd-catalyst poisoned by co impurities - from h2 used for catalytically reducing no3-ions to

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6814752A NL6814752A (en) 1968-10-15 1968-10-15 Regeneration of pd-catalyst poisoned by co impurities - from h2 used for catalytically reducing no3-ions to

Publications (1)

Publication Number Publication Date
NL6814752A true NL6814752A (en) 1970-04-17

Family

ID=19804932

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6814752A NL6814752A (en) 1968-10-15 1968-10-15 Regeneration of pd-catalyst poisoned by co impurities - from h2 used for catalytically reducing no3-ions to

Country Status (1)

Country Link
NL (1) NL6814752A (en)

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