FR2447367A1 - Methionine prepn. - with recovery of hydrogen cyanide and methyl mercaptan evolved - Google Patents

Methionine prepn. - with recovery of hydrogen cyanide and methyl mercaptan evolved

Info

Publication number
FR2447367A1
FR2447367A1 FR8001451A FR8001451A FR2447367A1 FR 2447367 A1 FR2447367 A1 FR 2447367A1 FR 8001451 A FR8001451 A FR 8001451A FR 8001451 A FR8001451 A FR 8001451A FR 2447367 A1 FR2447367 A1 FR 2447367A1
Authority
FR
France
Prior art keywords
prepn
methionine
evolved
hydantoin
methyl mercaptan
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.)
Granted
Application number
FR8001451A
Other languages
French (fr)
Other versions
FR2447367B1 (en
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.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
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
Priority claimed from JP54007852A external-priority patent/JPS60344B2/en
Priority claimed from JP994679A external-priority patent/JPS60345B2/en
Application filed by Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Publication of FR2447367A1 publication Critical patent/FR2447367A1/en
Application granted granted Critical
Publication of FR2447367B1 publication Critical patent/FR2447367B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/02—Preparation, separation or purification of hydrogen cyanide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/02—Preparation, separation or purification of hydrogen cyanide
    • C01C3/04—Separation from gases
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C321/00—Thiols, sulfides, hydropolysulfides or polysulfides
    • C07C321/02—Thiols having mercapto groups bound to acyclic carbon atoms
    • C07C321/04—Thiols having mercapto groups bound to acyclic carbon atoms of an acyclic saturated carbon skeleton
    • 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

Abstract

Prepn. of methionine which proceeds via hydantoin, HCN from the hydantoin prepn. is recovered by washing the gas evolved with either (a) aq. NH3 and CO2, which are starting materials for the hydantoin synthesis or with (b) the reaction mixture of methionine contg. hydantoin, and the washings are passed back to the hydantoin synthesis vessel and methyl mercaptan is recovered by washing the gas evolved with methylmercaptopropionaldehyde (I) and the washings passed back to the (I) synthesis vessel. The process is more economical to carry out than prior art methods, in which evolved HCN and methylmercaptan were oxidised rather than re-used.
FR8001451A 1979-01-25 1980-01-23 Methionine prepn. - with recovery of hydrogen cyanide and methyl mercaptan evolved Granted FR2447367A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP54007852A JPS60344B2 (en) 1979-01-25 1979-01-25 Method for recovering active ingredients from methionine synthesis exhaust gas
JP994679A JPS60345B2 (en) 1979-01-30 1979-01-30 Method for recovering active ingredients from methionine synthesis exhaust gas

Publications (2)

Publication Number Publication Date
FR2447367A1 true FR2447367A1 (en) 1980-08-22
FR2447367B1 FR2447367B1 (en) 1983-01-28

Family

ID=26342237

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8001451A Granted FR2447367A1 (en) 1979-01-25 1980-01-23 Methionine prepn. - with recovery of hydrogen cyanide and methyl mercaptan evolved

Country Status (5)

Country Link
BE (1) BE881325A (en)
DE (1) DE3001806A1 (en)
FR (1) FR2447367A1 (en)
IT (1) IT1143010B (en)
MX (1) MX154099A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115650890A (en) * 2022-04-28 2023-01-31 宁夏紫光天化蛋氨酸有限责任公司 Method for treating tail gas generated in production of 2-hydroxy-4-methylthiobutyronitrile

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2315935A1 (en) * 1973-03-30 1974-10-10 Quimco Gmbh Imidazole derivs. and prodn. from aldehyde - by reacting with ammonia and hydrogen cyanide and ring closure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3636098A (en) * 1966-07-02 1972-01-18 Sumitomo Chemical Co Process for producing methionine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2315935A1 (en) * 1973-03-30 1974-10-10 Quimco Gmbh Imidazole derivs. and prodn. from aldehyde - by reacting with ammonia and hydrogen cyanide and ring closure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115650890A (en) * 2022-04-28 2023-01-31 宁夏紫光天化蛋氨酸有限责任公司 Method for treating tail gas generated in production of 2-hydroxy-4-methylthiobutyronitrile

Also Published As

Publication number Publication date
IT8047681A0 (en) 1980-01-23
MX154099A (en) 1987-05-08
BE881325A (en) 1980-05-16
IT1143010B (en) 1986-10-22
DE3001806C2 (en) 1990-05-23
DE3001806A1 (en) 1980-07-31
FR2447367B1 (en) 1983-01-28

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Legal Events

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