GB839414A - Process for working up dilute aqueous hydrazine solutions - Google Patents

Process for working up dilute aqueous hydrazine solutions

Info

Publication number
GB839414A
GB839414A GB24741/58A GB2474158A GB839414A GB 839414 A GB839414 A GB 839414A GB 24741/58 A GB24741/58 A GB 24741/58A GB 2474158 A GB2474158 A GB 2474158A GB 839414 A GB839414 A GB 839414A
Authority
GB
United Kingdom
Prior art keywords
acetone
hydrazine
solution
holding
grams
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
GB24741/58A
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of GB839414A publication Critical patent/GB839414A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C251/00—Compounds containing nitrogen atoms doubly-bound to a carbon skeleton
    • C07C251/72—Hydrazones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/02—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping in boilers or stills
    • 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
    • C01B21/16—Hydrazine; Salts thereof

Landscapes

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

Abstract

<PICT:0839414/III/1> A process for working up dilute aqueous hydrazine solutions comprises the steps of (1) holding an aqueous solution of hydrazine containing acetone for a finite time in the homogeneous liquid state, distilling at least part of said solution; (2) adding acetone to the distillate, holding this treated distillate for a finite time in the homogeneous liquid state and then distilling at least part thereof. In a preferred embodiment, a charging vessel 1 containing 2% hydrazine hydrate aqueous solution and 50 grams/litre of acetone, is held for at least 10 minutes before commencing operations. This solution is then supplied continuously to an upper column 2 and holding vessels 3a and 3b in which the solution may remain for a time, the holding vessels being constantly charged with acetone from vessels 7a and 7b respectively. Sump flask 6 is heated by a gas flame and a discharge substantially free from hydrazine and acetone is withdrawn at such a rate that the flask is always half full. The distillate consisting of 120-160 grams of hydrazine hydrate and 360-480 grams of acetone per litre is collected in the receiver 5.
GB24741/58A 1957-07-31 1958-07-31 Process for working up dilute aqueous hydrazine solutions Expired GB839414A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF23648A DE1048884B (en) 1957-07-31 1957-07-31 Process for the preparation of dilute aqueous hydrazine solutions

Publications (1)

Publication Number Publication Date
GB839414A true GB839414A (en) 1960-06-29

Family

ID=7090929

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24741/58A Expired GB839414A (en) 1957-07-31 1958-07-31 Process for working up dilute aqueous hydrazine solutions

Country Status (7)

Country Link
US (1) US3028316A (en)
BE (1) BE569859A (en)
CH (1) CH373360A (en)
DE (1) DE1048884B (en)
FR (1) FR1201027A (en)
GB (1) GB839414A (en)
NL (2) NL229958A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1174235A (en) * 1966-03-12 1969-12-17 Fisons Ind Chemicals Ltd Forme Process and Apparatus for Separation of Acyclic Ketones and Azines
DE1273503B (en) * 1966-12-17 1968-07-25 Bayer Ag Process for the preparation of hydrazine from aqueous ketazine solutions
DE1282617B (en) * 1966-12-17 1968-11-14 Bayer Ag Process for the preparation of hydrazine from aqueous ketazine solutions
US3520367A (en) * 1968-10-28 1970-07-14 Phillips Petroleum Co Method of producing oil using steam condensate trapped in storage zone
NL1007442C2 (en) * 1997-11-04 1998-12-07 Josephus Johannes Petrus Maria Batch-Continuous counter-current equipment with superior performance.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2537791A (en) * 1946-08-17 1951-01-09 Edwal Lab Inc Method for production of hydrazine and/or hydrazine hydrate
NL209951A (en) * 1949-05-31
US2733195A (en) * 1954-09-01 1956-01-31 Process for concentrating aqueous

Also Published As

Publication number Publication date
NL229958A (en)
NL105668C (en)
CH373360A (en) 1963-11-30
BE569859A (en)
DE1048884B (en) 1959-01-22
FR1201027A (en) 1959-12-28
US3028316A (en) 1962-04-03

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