NL7001907A - Cyclic cyclohexanone oxime prepn - Google Patents

Cyclic cyclohexanone oxime prepn

Info

Publication number
NL7001907A
NL7001907A NL7001907A NL7001907A NL7001907A NL 7001907 A NL7001907 A NL 7001907A NL 7001907 A NL7001907 A NL 7001907A NL 7001907 A NL7001907 A NL 7001907A NL 7001907 A NL7001907 A NL 7001907A
Authority
NL
Netherlands
Prior art keywords
cyclohexanone oxime
residence time
prepn
circulating
hno3
Prior art date
Application number
NL7001907A
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 NL7001907A priority Critical patent/NL7001907A/en
Publication of NL7001907A publication Critical patent/NL7001907A/en

Links

Classifications

    • 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

Landscapes

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

Abstract

Cyclic cyclohexanone oxime prepn Prepn. comprises (a) circulating and acidic buffered aqs. reaction medium contg. NO3, H3PO4 and/or bisulphate between a hydroxylamine synthesis zone (I) and a cyclohexanone oxime synthesis zone (II); (b) catalytically reducing NO2 - in (I), with H2 in the presence of a Pd catalyst to form hydroxylamine, for use in (II); (c) separating cyclohexanone oxime; (d) adding NO2 in the form of HNO3 to the aqs reaction liquid for use in (I); (e) controlling the residence time of the circulating liquid in (I) by the pH of the hydroxylamine enriched circulating liquid discharged from (I); (f) regenerating the catalyst at an adjustable max. residence time by interrupting the control and transferring to a control of the supply of HNO3 in dependence on pH of the circulating liquid discharged from the residence time of the circulating liquid in the (I) being held at a min, and (g) returning to the control of the residence time in dependence on the pH and the HNO3 supply rate is again normal. The catalyst is regenerated by washing with the acidic buffered soln circulating in the process simultaneously.
NL7001907A 1970-02-11 1970-02-11 Cyclic cyclohexanone oxime prepn NL7001907A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7001907A NL7001907A (en) 1970-02-11 1970-02-11 Cyclic cyclohexanone oxime prepn

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7001907A NL7001907A (en) 1970-02-11 1970-02-11 Cyclic cyclohexanone oxime prepn

Publications (1)

Publication Number Publication Date
NL7001907A true NL7001907A (en) 1971-08-13

Family

ID=19809299

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7001907A NL7001907A (en) 1970-02-11 1970-02-11 Cyclic cyclohexanone oxime prepn

Country Status (1)

Country Link
NL (1) NL7001907A (en)

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