GB1237346A - Process for the preparation of methionine - Google Patents

Process for the preparation of methionine

Info

Publication number
GB1237346A
GB1237346A GB7322/70A GB732270A GB1237346A GB 1237346 A GB1237346 A GB 1237346A GB 7322/70 A GB7322/70 A GB 7322/70A GB 732270 A GB732270 A GB 732270A GB 1237346 A GB1237346 A GB 1237346A
Authority
GB
United Kingdom
Prior art keywords
methionine
preparation
nitrile
layer
waterrich
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
GB7322/70A
Inventor
Hubertus Johannes Ger Henskens
Georg Julius Jacobus Maass
Sjoerd Kuipers
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.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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 Stamicarbon BV filed Critical Stamicarbon BV
Publication of GB1237346A publication Critical patent/GB1237346A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
    • C07C323/50—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton
    • C07C323/51—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton
    • C07C323/57—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups
    • C07C323/58—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being further substituted by nitrogen atoms, not being part of nitro or nitroso groups with amino groups bound to the carbon skeleton
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
    • C07C319/14—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides
    • C07C319/20—Preparation of thiols, sulfides, hydropolysulfides or polysulfides of sulfides by reactions not involving the formation of sulfide groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C319/00—Preparation of thiols, sulfides, hydropolysulfides or polysulfides
    • C07C319/26—Separation; Purification; Stabilisation; Use of additives
    • C07C319/28—Separation; Purification

Abstract

1,237,346. Preparation of methionine. STAMICARBON N.V. 16 Feb., 1970 [15 Feb., 1969], No. 7322/70. Heading C2C. In the preparation of methionine by a process comprising converting in a reaction zone #- methylmercapto-propionaldehyde under superatmospheric pressure and at a temperature between 0‹ and 60‹ C. into methionine nitrile with HCN and NH 3 (or NH 4 CN) using a reaction medium comprising ammonia and water, the resulting reaction mixture (containing methionine nitrile) is heated in a closed system to a temperature not more than 100‹ C., e.g. 65-75‹ C., and the mixture is expanded with removal of the gaseous NH 3 liberated, and then separated, with consequent cooling, into a waterrich liquid layer containing ammonia, and a liquid layer rich in methionine nitrile, the waterrich layer being recirculated to the reaction zone and the other layer being subjected to acid hydrolysis to form methionine.
GB7322/70A 1969-02-15 1970-02-16 Process for the preparation of methionine Expired GB1237346A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6902453A NL6902453A (en) 1969-02-15 1969-02-15

Publications (1)

Publication Number Publication Date
GB1237346A true GB1237346A (en) 1971-06-30

Family

ID=19806169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7322/70A Expired GB1237346A (en) 1969-02-15 1970-02-16 Process for the preparation of methionine

Country Status (5)

Country Link
BE (1) BE745945A (en)
DE (1) DE2006979A1 (en)
FR (1) FR2035407A5 (en)
GB (1) GB1237346A (en)
NL (1) NL6902453A (en)

Also Published As

Publication number Publication date
FR2035407A5 (en) 1970-12-18
DE2006979A1 (en) 1970-09-10
NL6902453A (en) 1970-08-18
BE745945A (en) 1970-08-13

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