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GB863323A - Improvements in the concentration of gaseous isotopes - Google Patents

Improvements in the concentration of gaseous isotopes

Info

Publication number
GB863323A
GB863323A GB1185358A GB1185358A GB863323A GB 863323 A GB863323 A GB 863323A GB 1185358 A GB1185358 A GB 1185358A GB 1185358 A GB1185358 A GB 1185358A GB 863323 A GB863323 A GB 863323A
Authority
GB
United Kingdom
Prior art keywords
nitric oxide
isotope
hno3
formulae
rectification
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
GB1185358A
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.)
BASF Schweiz AG
Original Assignee
Ciba AG
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 Ciba AG filed Critical Ciba AG
Publication of GB863323A publication Critical patent/GB863323A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D59/00—Separation of different isotopes of the same chemical element
    • B01D59/28—Separation by chemical exchange
    • B01D59/32—Separation by chemical exchange by exchange between fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D59/00—Separation of different isotopes of the same chemical element
    • B01D59/02—Separation by phase transition
    • B01D59/04—Separation by phase transition by distillation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D59/00—Separation of different isotopes of the same chemical element
    • B01D59/50—Separation involving two or more processes covered by different groups selected from groups B01D59/02, B01D59/10, B01D59/20, B01D59/22, B01D59/28, B01D59/34, B01D59/36, B01D59/38, B01D59/44

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

Nitric oxide having up to about 2% of isotope-containing molecules e.g. 15NO, N17O and N18O and which are further concentrated by rectification (see Group XXVIII) is prepared by disproportionating of dinitrogen tetroxide with water; the tetroxide being formed during the production of nitric acid. Lean nitric oxide gas leaving the rectifier is caused to undergo an exchange reaction with nitric acid whereby the starting isotope concentration is re-established according to the formulae: NO + H15NO3 \sp 15NO + HNO3 and NO + HNO218O \sp N18O + HNO3. Also isotope enriched nitric oxide liquid from the base of the rectifier is treated with nitrous gases and/or nitrous acid as catalyst whereupon the equilibria between individual molecular types readjust themselves according to the formulae: 15NO + N17O \sp NO + 15N17O 15NO + N18O \sp NO + 15N18O and from which mixture 15N17O and 15N18O may be concentrated by rectification.
GB1185358A 1957-04-23 1958-04-14 Improvements in the concentration of gaseous isotopes Expired GB863323A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH4527957 1957-04-23

Publications (1)

Publication Number Publication Date
GB863323A true GB863323A (en) 1961-03-22

Family

ID=4515527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1185358A Expired GB863323A (en) 1957-04-23 1958-04-14 Improvements in the concentration of gaseous isotopes

Country Status (6)

Country Link
BE (1) BE567014A (en)
CH (1) CH358070A (en)
DE (1) DE1208295B (en)
FR (1) FR1206682A (en)
GB (1) GB863323A (en)
NL (2) NL227108A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115025727B (en) * 2021-10-23 2024-04-30 苏州思萃同位素技术研究所有限公司 Preparation device and preparation method of oxygen isotope oxalic acid

Also Published As

Publication number Publication date
BE567014A (en)
DE1208295B (en) 1966-01-05
FR1206682A (en) 1960-02-11
NL227108A (en)
NL112909C (en)
CH358070A (en) 1961-11-15

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