ES476180A1 - Procedimiento para la obtencion continua de monoisocianatos. - Google Patents
Procedimiento para la obtencion continua de monoisocianatos.Info
- Publication number
- ES476180A1 ES476180A1 ES476180A ES476180A ES476180A1 ES 476180 A1 ES476180 A1 ES 476180A1 ES 476180 A ES476180 A ES 476180A ES 476180 A ES476180 A ES 476180A ES 476180 A1 ES476180 A1 ES 476180A1
- Authority
- ES
- Spain
- Prior art keywords
- monoisocyanate
- solvent
- boiling point
- decomposition
- continuous production
- 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
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
Procedimiento para la obtención continua de monoisocianatos de fórmula R-NCO donde R significa un resto hidrocarburo alifático, en caso dado olefínicamente insaturado, con h hasta 3 átomos de carbono, por disociación térmica del correspondiente N-alquibarbamidato de arilo de fórmula R-NH-CO-O-R'' donde R tiene el significado arriba mencionada y R'' significa un resto tal y como se obtiene por eliminación del grupo hidroxilo de un monofenol con un punto de ebullición a presión normal inferior a 250ºC y separación destilativa de los productos de disociación caracterizado porque a) una solución del N-alquilcarbamidato de arilo a disociar se calienta en un disolvente orgánico inerte bajo las condiciones de reacción con un punto de ebullición que se encuentra como mínimo 20ºC por encima del punto de ebullición del monoisocianato a formar, a presión normal o a presión ligeramente más reducida , en la zona de 200 hasta 1013 mbar, bajo disociación del éster en el correspondiente monoisocianato y en el correspondiente fenol, así, como bajo evaporación del disolvente y de los productos de disociación, a una temperatura en el margen de 160 hasta 250ºC y b) los vapores obtenidos según a) se conducen conjuntamente a una columna de destilación de la que se obtiene el fenol y como mínimo la cantidad principal del disolvente en forma de una corriente lateral común o en forma de varias corrientes laterales, y el monoisocianato, en caso dado junto con una parte del disolvente, a través de la cabeza.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19772756928 DE2756928A1 (de) | 1977-12-21 | 1977-12-21 | Verfahren zur kontinuierlichen herstellung von monoisocyanaten |
Publications (1)
Publication Number | Publication Date |
---|---|
ES476180A1 true ES476180A1 (es) | 1979-04-16 |
Family
ID=6026681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES476180A Expired ES476180A1 (es) | 1977-12-21 | 1978-12-20 | Procedimiento para la obtencion continua de monoisocianatos. |
Country Status (6)
Country | Link |
---|---|
US (1) | US4195031A (es) |
EP (1) | EP0002708B1 (es) |
JP (1) | JPS54122225A (es) |
BR (1) | BR7808318A (es) |
DE (2) | DE2756928A1 (es) |
ES (1) | ES476180A1 (es) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3047898A1 (de) * | 1980-12-19 | 1982-07-15 | Bayer Ag, 5090 Leverkusen | Verfahren zur kontinuierlichen thermischen spaltung von carbamidsaeureestern und die verwendung von hierbei anfallenden isocyanate und carbamidsaeureester aufweisenden gemischen zur herstellung von isocyanaten |
DE3049627A1 (de) * | 1980-12-31 | 1982-07-29 | Basf Ag, 6700 Ludwigshafen | "verfahren zur herstellung von l-alkenylisocyanaten" |
IT1164223B (it) * | 1983-05-13 | 1987-04-08 | Anic Spa | Procedimento perfezionato per la produzione di isocianati alchilici |
DE3325185A1 (de) * | 1983-07-13 | 1985-01-24 | Basf Ag, 6700 Ludwigshafen | In 3-stellung heterocyclische oder 3-dialkylamino-2,2-dialkyl-propylisocyanate und verfahren zur herstellung von in 3-stellung heterocyclischen oder 3-dialkylamino-2,2-dialkylpropylisocyanaten |
DE3339300A1 (de) * | 1983-10-29 | 1985-05-09 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von isocyanaten durch thermische spaltung von urethanen |
US4587056A (en) * | 1984-04-26 | 1986-05-06 | Asahi Kasei Kogyo Kabushiki Kaisha | Process for producing an aliphatic isocyanate |
JPS60231640A (ja) * | 1984-05-02 | 1985-11-18 | Asahi Chem Ind Co Ltd | イソシアナ−トの連続的製法 |
IT1183332B (it) * | 1985-02-08 | 1987-10-22 | Enichem Sintesi | Procedimento per la produzione di n-metilcarbammati |
IL81939A0 (en) * | 1986-03-21 | 1987-10-20 | Union Carbide Corp | Process for preparing methyl isocyanate |
DE4137428A1 (de) * | 1991-11-14 | 1993-05-19 | Bayer Ag | Verfahren zur herstellung von polyisocyanaten |
KR20150114523A (ko) * | 2013-02-08 | 2015-10-12 | 바이엘 머티리얼사이언스 아게 | 기체상에서 1차 아민의 포스겐화에 의해 제조된 이소시아네이트를 포스겐화 기체의 조생성물로부터 분리하는 방법 |
CN107935889B (zh) * | 2017-11-29 | 2020-08-28 | 万华化学集团股份有限公司 | 一种单异氰酸酯的制备方法及装置 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2409712A (en) * | 1944-02-03 | 1946-10-22 | Du Pont | Chemical process and products |
US3076007A (en) * | 1958-08-29 | 1963-01-29 | Union Carbide Corp | Organic isocyanate preparation |
US3366662A (en) * | 1964-03-02 | 1968-01-30 | Olin Mathieson | Process for preparing isocyanates |
US3734941A (en) * | 1968-09-06 | 1973-05-22 | American Cyanamid Co | Process for converting urethanes to isocyanates |
US3962302A (en) * | 1974-03-08 | 1976-06-08 | Atlantic Richfield Company | Production of isocyanates from esters of carbamic acids (urethanes) |
US3919279A (en) * | 1974-06-26 | 1975-11-11 | Atlantic Richfield Co | Catalytic production of isocyanates from esters of carbamic acids |
US3919280A (en) * | 1974-07-05 | 1975-11-11 | Atlantic Richfield Co | Recovery of solvents employed in the production of isocyanates from esters of carbamic acids |
DE2512514C2 (de) * | 1975-03-21 | 1982-12-30 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von aliphatischen Isocyanaten |
JPS5219624A (en) * | 1975-08-07 | 1977-02-15 | Mitsui Toatsu Chem Inc | Process for preparation of isocyanates |
US3992430A (en) * | 1975-09-11 | 1976-11-16 | Chevron Research Company | Process for preparing aromatic isocyanates |
-
1977
- 1977-12-21 DE DE19772756928 patent/DE2756928A1/de not_active Withdrawn
-
1978
- 1978-12-09 DE DE7878101626T patent/DE2860221D1/de not_active Expired
- 1978-12-09 EP EP78101626A patent/EP0002708B1/de not_active Expired
- 1978-12-19 JP JP15585378A patent/JPS54122225A/ja active Granted
- 1978-12-19 BR BR7808318A patent/BR7808318A/pt unknown
- 1978-12-20 US US05/965,648 patent/US4195031A/en not_active Expired - Lifetime
- 1978-12-20 ES ES476180A patent/ES476180A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS54122225A (en) | 1979-09-21 |
BR7808318A (pt) | 1979-08-07 |
DE2756928A1 (de) | 1979-07-05 |
EP0002708A1 (de) | 1979-07-11 |
US4195031A (en) | 1980-03-25 |
JPS6157297B2 (es) | 1986-12-06 |
DE2860221D1 (en) | 1981-01-22 |
EP0002708B1 (de) | 1980-10-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19990405 |