GB1288821A - - Google Patents

Info

Publication number
GB1288821A
GB1288821A GB1288821DA GB1288821A GB 1288821 A GB1288821 A GB 1288821A GB 1288821D A GB1288821D A GB 1288821DA GB 1288821 A GB1288821 A GB 1288821A
Authority
GB
United Kingdom
Prior art keywords
potassium azide
centrifuge
march
precipitated
vessel
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
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
Publication of GB1288821A publication Critical patent/GB1288821A/en
Expired legal-status Critical Current

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
    • C01B21/08—Hydrazoic acid; Azides; Halogen azides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Saccharide Compounds (AREA)

Abstract

1288821 Potassium azide; alkali metal carbonates PPG INDUSTRIES Inc 26 March 1970 [27 March 1969] 14636/70 Heading C1A Potassium azide is obtained by crystallization from a solution containing significant quantities (which term is defined) of Na<SP>+</SP>, K<SP>+</SP>, N 3 -, and CO 3 =. In the illustrated cyclic process a liquor in line 2 containing said ions passes to vessel 1 and associated cooling means 6 where the potassium azide is precipitated by cooling and also by removal of water from vapour head 10 at the low temperature. KN 3 is separated from the slurry in centrifuge 16 and dried 22. The mother liquor is then heated 26 and to it is added a solution of K 2 CO 3 , NaN 3 and H 2 O containing salts in amounts equivalent to the amount of KN 3 precipitated. Water is heated 38 and evaporated from vapour head 40 and Na 2 CO 3 .H 2 O then crystallizes out in vessel 34. This salt is separated off in centrifuge 48, washed if so desired and dried 59, the mother liquor is then recycled to crystallizer 1 via line 2.
GB1288821D 1969-03-27 1970-03-26 Expired GB1288821A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00810980A US3803296A (en) 1969-03-27 1969-03-27 Production of potassium azide by double replacement

Publications (1)

Publication Number Publication Date
GB1288821A true GB1288821A (en) 1972-09-13

Family

ID=25205207

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1288821D Expired GB1288821A (en) 1969-03-27 1970-03-26

Country Status (8)

Country Link
US (1) US3803296A (en)
JP (1) JPS5033997B1 (en)
BE (1) BE747996A (en)
CA (1) CA936673A (en)
DE (1) DE2014731A1 (en)
FR (1) FR2040050A1 (en)
GB (1) GB1288821A (en)
NL (1) NL7004372A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4230988C2 (en) * 1991-09-18 1998-11-12 Trw Vehicle Safety Systems Process for the recovery of azide values from gas-generating materials based on azide

Also Published As

Publication number Publication date
JPS5033997B1 (en) 1975-11-05
CA936673A (en) 1973-11-13
FR2040050A1 (en) 1971-01-15
NL7004372A (en) 1970-09-29
BE747996A (en) 1970-09-28
US3803296A (en) 1974-04-09
DE2014731A1 (en) 1970-10-15

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee