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FR2651776B1 - PROCESS FOR THE SYNTHESIS OF MONOMETHYLHYDRAZINE IN AQUEOUS SOLUTION. - Google Patents

PROCESS FOR THE SYNTHESIS OF MONOMETHYLHYDRAZINE IN AQUEOUS SOLUTION.

Info

Publication number
FR2651776B1
FR2651776B1 FR8911960A FR8911960A FR2651776B1 FR 2651776 B1 FR2651776 B1 FR 2651776B1 FR 8911960 A FR8911960 A FR 8911960A FR 8911960 A FR8911960 A FR 8911960A FR 2651776 B1 FR2651776 B1 FR 2651776B1
Authority
FR
France
Prior art keywords
reactor
pref
mixt
medium
reaction
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 - Lifetime
Application number
FR8911960A
Other languages
French (fr)
Other versions
FR2651776A1 (en
Inventor
Lecolier Serge
Le Gars Pierre
Pohlig Veronique
Shweickert Jean-Claude
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.)
Societe Nationale des Poudres et Explosifs
Original Assignee
Societe Nationale des Poudres et Explosifs
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 Societe Nationale des Poudres et Explosifs filed Critical Societe Nationale des Poudres et Explosifs
Priority to FR8911960A priority Critical patent/FR2651776B1/en
Priority to DE19904029119 priority patent/DE4029119B4/en
Priority to JP24366790A priority patent/JP2958351B2/en
Publication of FR2651776A1 publication Critical patent/FR2651776A1/en
Application granted granted Critical
Publication of FR2651776B1 publication Critical patent/FR2651776B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C241/00—Preparation of compounds containing chains of nitrogen atoms singly-bound to each other, e.g. hydrazines, triazanes
    • C07C241/02—Preparation of hydrazines

Landscapes

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

Abstract

Prodn. of monomethylhydrazine (I) in aq. soln. comprises reaction of chloramine (II) with a 1 mol excess of MeNH2 (III) for a time D1 in aq. medium and oxygen-free atmos., in the presence of a strong base, pref. NaOH, and working up the mixt. of (I) and volatile by-prods. obtd., pref. by stripping followed by distn., to give a conc. aq. soln. of (I). The novelty is that, before the reaction mixt. is worked up, it is then heated to 30-100 (pref. 70-100) deg.C for a time D2 such that D2/D1 is greater than 10 (pref. 50-100), in the absence of oxygen and keeping the pH above 13.5, so that the above by-prods. (esp. methyldiazine) are partly or completely removed. - Process is operated continuously; (II) is produced in aq. basic medium with pH 10-14 (pref. in a NH3/NH4Cl buffer) under oxygen-free atmos., by reaction of ammonia with alkali hypochlorite (pref. NaOCl) at -10 to +10 deg.C. (II) is produced in a first reactor with an inlet for the aq. medium and the reactants and an outlet through which the reaction mixt. is transferred by suitable devices to a sec. reactor, from there to a third reactor in which the extra prodn. stage is carried out, and then to the purificn./concn. stage. The third reactor is a tube reactor fitted with a double mantle which enables circulation of a fluid. On leaving the first reactor, the medium contg. (II) is passed to a mixer which is also charged with (III), and the mixt. thus obtd. is transferred to the sec. reactor which is charged with strong base.
FR8911960A 1989-09-13 1989-09-13 PROCESS FOR THE SYNTHESIS OF MONOMETHYLHYDRAZINE IN AQUEOUS SOLUTION. Expired - Lifetime FR2651776B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR8911960A FR2651776B1 (en) 1989-09-13 1989-09-13 PROCESS FOR THE SYNTHESIS OF MONOMETHYLHYDRAZINE IN AQUEOUS SOLUTION.
DE19904029119 DE4029119B4 (en) 1989-09-13 1990-09-13 Process for the preparation of monomethylhydrazine in aqueous solution
JP24366790A JP2958351B2 (en) 1989-09-13 1990-09-13 Method for synthesizing aqueous solution of monomethylhydrazine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8911960A FR2651776B1 (en) 1989-09-13 1989-09-13 PROCESS FOR THE SYNTHESIS OF MONOMETHYLHYDRAZINE IN AQUEOUS SOLUTION.

Publications (2)

Publication Number Publication Date
FR2651776A1 FR2651776A1 (en) 1991-03-15
FR2651776B1 true FR2651776B1 (en) 1991-10-25

Family

ID=9385408

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8911960A Expired - Lifetime FR2651776B1 (en) 1989-09-13 1989-09-13 PROCESS FOR THE SYNTHESIS OF MONOMETHYLHYDRAZINE IN AQUEOUS SOLUTION.

Country Status (3)

Country Link
JP (1) JP2958351B2 (en)
DE (1) DE4029119B4 (en)
FR (1) FR2651776B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2864078B1 (en) * 2003-12-17 2006-02-10 Isochem Sa PROCESS FOR THE CONTINUOUS SYNTHESIS OF MONOALKYL HYDRAZINES WITH FUNCTIONALIZED ALKYL GROUP
FR2864081B1 (en) 2003-12-17 2006-04-28 Isochem Sa PROCESS FOR THE SYNTHESIS OF EXOCYCLIC CYCLOALKYL HYDRAZINE DERIVATIVES AND EXOCYCLIC HETEROCYCLOALKYL HYDRAZINE DERIVATIVES

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3394184A (en) * 1964-06-25 1968-07-23 Olin Mathieson Manufacture of monomethylhydrazine
US3423464A (en) * 1966-08-25 1969-01-21 Olin Mathieson Process for the manufacture of monomethylhydrazine

Also Published As

Publication number Publication date
FR2651776A1 (en) 1991-03-15
DE4029119A1 (en) 1991-04-18
JPH03109367A (en) 1991-05-09
DE4029119B4 (en) 2006-10-26
JP2958351B2 (en) 1999-10-06

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