FR2360564A1 - Procede de preparation de mono-isocyanates aliphatiques a partir des chlorures d'acides carbamiques correspondants - Google Patents
Procede de preparation de mono-isocyanates aliphatiques a partir des chlorures d'acides carbamiques correspondantsInfo
- Publication number
- FR2360564A1 FR2360564A1 FR7724272A FR7724272A FR2360564A1 FR 2360564 A1 FR2360564 A1 FR 2360564A1 FR 7724272 A FR7724272 A FR 7724272A FR 7724272 A FR7724272 A FR 7724272A FR 2360564 A1 FR2360564 A1 FR 2360564A1
- Authority
- FR
- France
- Prior art keywords
- isocyanates
- hydrogen atom
- carbamic acid
- active hydrogen
- acid chlorides
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/04—Preparation of derivatives of isocyanic acid from or via carbamates or carbamoyl halides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Selon l'invention on convertit la chlorures d'acides carbamiques en présence de solvants inertes, par réaction avec des composés portant au moins un atome d'hydrogène actif avec séparation du chlorure d'hydrogène, en composés d'addition des isocyanates correspondants qu'on décompose ensuite à la chaleur en l'isoyanate recherché et le composé portant au moins un atome d'hydrogène actif, en séparant simultanément par distillation le mono-isocyanate recherché et le composé portant un atome d'hydrogène actif qu'on récupère et qu'on réutilise. Les mono-isoyanates préparés par le procédé selon l'invention sont des produits de départ de la préparation de produits phytosanitaires et de médicaments.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19762635280 DE2635280C2 (de) | 1976-08-05 | 1976-08-05 | Verfahren zur Herstellung von aliphatischen Monoisocyanaten |
DE19772702051 DE2702051C2 (de) | 1977-01-19 | 1977-01-19 | Verfahren zur Herstellung von aliphatischen Monoisocyanaten |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2360564A1 true FR2360564A1 (fr) | 1978-03-03 |
FR2360564B1 FR2360564B1 (fr) | 1980-09-05 |
Family
ID=25770784
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7724272A Granted FR2360564A1 (fr) | 1976-08-05 | 1977-08-05 | Procede de preparation de mono-isocyanates aliphatiques a partir des chlorures d'acides carbamiques correspondants |
Country Status (8)
Country | Link |
---|---|
US (1) | US4146550A (fr) |
JP (1) | JPS5321118A (fr) |
BR (1) | BR7705166A (fr) |
CA (1) | CA1096393A (fr) |
CH (1) | CH629754A5 (fr) |
FR (1) | FR2360564A1 (fr) |
GB (1) | GB1557087A (fr) |
IT (1) | IT1079912B (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4285876A (en) * | 1979-10-10 | 1981-08-25 | Vertac, Inc. | Isocyanate adducts with β-diketones |
US4310688A (en) * | 1979-10-22 | 1982-01-12 | The Dow Chemical Company | Reduction of hydrolyzable chloride impurities in an isocyanatoalkyl ester of an organic carboxylic acid |
US4391758A (en) * | 1982-04-19 | 1983-07-05 | Spaziante Placido M | Process for methyl isocyanate production |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1817017A1 (de) * | 1967-12-28 | 1969-08-14 | Takeda Chemical Industries Ltd | Stabilisierte Isocyanate |
DE1593554A1 (de) * | 1965-09-15 | 1970-09-03 | Stauffer Chemical Co | Verfahren zur Herstellung organischer Isocyanate |
GB1208862A (en) * | 1966-12-05 | 1970-10-14 | Ici Ltd | Manufacture of organic isocyanates |
US3644461A (en) * | 1969-02-19 | 1972-02-22 | Ott Chemical Co | Preparation of alkyl isocyanates |
DE2156761A1 (de) * | 1971-11-16 | 1973-06-07 | Basf Ag | Verfahren zur herstellung von isocyanaten |
DE2210285A1 (de) * | 1972-03-03 | 1973-09-06 | Basf Ag | Verfahren zur herstellung von isocyanaten |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2773086A (en) * | 1953-01-19 | 1956-12-04 | Monsanto Chemicals | Production of isocyanates from substituted ureas |
US3410887A (en) * | 1965-01-29 | 1968-11-12 | Upjohn Co | Process for preparing aliphatic isocyanates |
DE2512514C2 (de) * | 1975-03-21 | 1982-12-30 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von aliphatischen Isocyanaten |
-
1977
- 1977-07-18 US US05/817,082 patent/US4146550A/en not_active Expired - Lifetime
- 1977-07-22 CA CA283,336A patent/CA1096393A/fr not_active Expired
- 1977-08-02 CH CH950877A patent/CH629754A5/de not_active IP Right Cessation
- 1977-08-03 IT IT50549/77A patent/IT1079912B/it active
- 1977-08-04 GB GB32745/77A patent/GB1557087A/en not_active Expired
- 1977-08-04 BR BR7705166A patent/BR7705166A/pt unknown
- 1977-08-05 JP JP9345077A patent/JPS5321118A/ja active Pending
- 1977-08-05 FR FR7724272A patent/FR2360564A1/fr active Granted
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1593554A1 (de) * | 1965-09-15 | 1970-09-03 | Stauffer Chemical Co | Verfahren zur Herstellung organischer Isocyanate |
GB1208862A (en) * | 1966-12-05 | 1970-10-14 | Ici Ltd | Manufacture of organic isocyanates |
DE1817017A1 (de) * | 1967-12-28 | 1969-08-14 | Takeda Chemical Industries Ltd | Stabilisierte Isocyanate |
US3644461A (en) * | 1969-02-19 | 1972-02-22 | Ott Chemical Co | Preparation of alkyl isocyanates |
DE2156761A1 (de) * | 1971-11-16 | 1973-06-07 | Basf Ag | Verfahren zur herstellung von isocyanaten |
DE2210285A1 (de) * | 1972-03-03 | 1973-09-06 | Basf Ag | Verfahren zur herstellung von isocyanaten |
Also Published As
Publication number | Publication date |
---|---|
JPS5321118A (en) | 1978-02-27 |
BR7705166A (pt) | 1978-04-25 |
CA1096393A (fr) | 1981-02-24 |
FR2360564B1 (fr) | 1980-09-05 |
CH629754A5 (de) | 1982-05-14 |
GB1557087A (en) | 1979-12-05 |
IT1079912B (it) | 1985-05-13 |
US4146550A (en) | 1979-03-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |