ES460560A1 - Procedimiento para la obtencion de isomeros de diisocianato-difenilmetano. - Google Patents
Procedimiento para la obtencion de isomeros de diisocianato-difenilmetano.Info
- Publication number
- ES460560A1 ES460560A1 ES460560A ES460560A ES460560A1 ES 460560 A1 ES460560 A1 ES 460560A1 ES 460560 A ES460560 A ES 460560A ES 460560 A ES460560 A ES 460560A ES 460560 A1 ES460560 A1 ES 460560A1
- Authority
- ES
- Spain
- Prior art keywords
- diisocyanatodiphenylmethane
- column
- fraction
- chlorine compounds
- methaneisomers
- 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
- C07C263/18—Separation; Purification; Stabilisation; Use of additives
- C07C263/20—Separation; Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Procedimiento para la obtención de isómeros de diisocianatodifenilmetano con un contenido graduado de compuestos de cloro mediante separación destilativa de isómeros de diisocianatodifenilmetano de una mezcla de poliisocianato de la serie difenilmetano, obtenida por fosgenación de condensados de anilina-formaldehido, en una etapa de destilación 1 y ulterior purificación destilativa de la fracción I así obtenida, caracterizado porque la fracción I se destila en una columna de destilación 2 bajo una proporción de reflujo de 0,1 ¿ 10, extrayéndose un 0,5 hasta 10% en peso de la cantidad total de la fracción I introducida en la columna 2 como producto de pie de la columna, a continuación la fracción II obtenida como producto de cabeza de la columna 2 se libera en una etapa de destilación dispuesta a continuación de las impurezas fácilmente volátiles y, en caso dado, simultáneamente del 2,4¿-diisocianatodifenilmetano, y el producto de pie de la columna aquí obtenido se elabora en forma en si conocida a 4,4¿-diisocianatodifenilmetano purificado y, en caso dado, 2,4¿-diisocianatodifenilmetano.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19762631168 DE2631168B2 (de) | 1976-07-10 | 1976-07-10 | Verfahren zur Herstellung von Diisocyanatodiphenylmethan-Isomeren mit einem eingestellten Gehalt an Chlorverbindungen |
Publications (1)
Publication Number | Publication Date |
---|---|
ES460560A1 true ES460560A1 (es) | 1978-05-16 |
Family
ID=5982715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES460560A Expired ES460560A1 (es) | 1976-07-10 | 1977-07-08 | Procedimiento para la obtencion de isomeros de diisocianato-difenilmetano. |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS539750A (es) |
BE (1) | BE856617A (es) |
DE (1) | DE2631168B2 (es) |
ES (1) | ES460560A1 (es) |
FR (1) | FR2357532A1 (es) |
GB (1) | GB1570741A (es) |
Families Citing this family (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54103415A (en) * | 1978-01-31 | 1979-08-14 | Ricoh Kk | Lens bonding |
JPS54102320A (en) * | 1978-01-31 | 1979-08-11 | Ricoh Kk | Lens bonding and apparatus therefor |
JPS54102321A (en) * | 1978-01-31 | 1979-08-11 | Ricoh Kk | Removing bubbles in lens bonding |
DE2935318A1 (de) * | 1979-08-31 | 1981-03-26 | Bayer Ag, 51373 Leverkusen | Neue diisocyanate bzw. diisocyanatgemische der diphenylmethanreihe, verfahren zu ihrer herstellung, sowie ihre verwendung als aufbaukomponente bei der herstellung von polyurethankunststoffen nach dem isocyanat-polyadditionsverfahren |
JPH02311452A (ja) * | 1989-05-26 | 1990-12-27 | Daicel Chem Ind Ltd | ジイソシアネート化合物 |
JP2875877B2 (ja) * | 1990-10-23 | 1999-03-31 | 三井化学株式会社 | メチレン架橋ポリフェニレンポリイソシアネートの製造方法 |
DE19914292A1 (de) | 1999-03-30 | 2000-10-05 | Bayer Ag | Verfahren zur Verringerung des Chlorgehaltes von organischen Isocyanaten |
DE19914291A1 (de) | 1999-03-30 | 2000-10-05 | Bayer Ag | Verfahren zur Absenkung des Chlorgehaltes von niedermolekularen Isocyanaten |
EP1475367B1 (de) * | 2003-05-08 | 2010-07-07 | Bayer MaterialScience AG | Verfahren zur Destillation eines Gemisches isomerer Diisocyanatodiphenylmethane |
DE102004005319A1 (de) * | 2004-02-04 | 2005-08-25 | Bayer Materialscience Ag | Verfahren zur Herstellung von hochreinem 2,4'-Methylendiphenyldiisocyanat |
DE102005004170A1 (de) * | 2005-01-29 | 2006-08-03 | Bayer Materialscience Ag | Verfahren zur Destillation eines Gemisches isomerer Diisocyanatodiphenylmethane |
DE102005026864A1 (de) | 2005-06-10 | 2006-12-14 | Bayer Materialscience Ag | Verfahren zur Herstellung von 4,4'-Diphenylmethandiisocyanat |
DE102005053065A1 (de) * | 2005-11-04 | 2007-05-10 | Basf Ag | Verfahren zur Herstellung von Polyisocyanatgemischen |
US8907124B2 (en) | 2010-11-17 | 2014-12-09 | Basf Se | Process for preparing methylenedi(phenyl isocyanate) |
EP2640694B1 (de) | 2010-11-17 | 2019-01-09 | Basf Se | Verfahren zur herstellung von methylendiphenyldiisocyanat |
US9505711B2 (en) | 2010-11-17 | 2016-11-29 | Basf Se | Method for purifying mixtures comprising 4,4′-methylenediphenyl diisocyanate |
KR101898743B1 (ko) * | 2010-11-17 | 2018-09-13 | 바스프 에스이 | 4,4'-메틸렌디페닐 디이소시아네이트를 포함하는 혼합물의 정제 방법 |
EP2640696B1 (de) * | 2010-11-17 | 2016-08-10 | Basf Se | Verfahren zur aufreinigung von 4,4'-methylendiphenyldiisocyanat enthaltenden mischungen |
JP2015010183A (ja) * | 2013-06-28 | 2015-01-19 | 旭化成ケミカルズ株式会社 | ジイソシアネート組成物 |
JP6731929B2 (ja) | 2015-01-30 | 2020-07-29 | ビーエーエスエフ ソシエタス・ヨーロピアBasf Se | 副生成物含有量の少ないポリフェニレンポリメチレンポリイソシアネート |
EP3498689A1 (en) * | 2017-12-14 | 2019-06-19 | Sulzer Chemtech AG | A plant and method for purifying an isomeric monomer, such as 4,4'-methylene diphenyl diisocyanate, from a crude mixture |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3219678A (en) * | 1963-02-28 | 1965-11-23 | Olin Mathieson | Process for reducing the hydrolyzable chlorine content of organic isocyanates |
GB1194459A (en) * | 1967-10-31 | 1970-06-10 | Takeda Chemical Industries Ltd | Method for the Purification of Isocyanates |
GB1398975A (en) * | 1971-08-16 | 1975-06-25 | Ici Ltd | Heat treatment and distillation of methylene bridged polyphenyl polyisocyanates |
GB1384065A (en) * | 1971-11-30 | 1975-02-19 | Ici Ltd | Process for the purification of organic isocyanates |
US3853936A (en) * | 1973-02-05 | 1974-12-10 | Olin Corp | Process for distillation of toluene diisocyanate |
US3912600A (en) * | 1974-05-09 | 1975-10-14 | Upjohn Co | Recovery of polymethylene polyphenyl polyisocyanate from a phoshenosed polyamine feed |
-
1976
- 1976-07-10 DE DE19762631168 patent/DE2631168B2/de not_active Ceased
-
1977
- 1977-07-07 GB GB2851477A patent/GB1570741A/en not_active Expired
- 1977-07-08 JP JP8111477A patent/JPS539750A/ja active Pending
- 1977-07-08 BE BE179183A patent/BE856617A/xx not_active IP Right Cessation
- 1977-07-08 FR FR7721174A patent/FR2357532A1/fr active Granted
- 1977-07-08 ES ES460560A patent/ES460560A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1570741A (en) | 1980-07-09 |
JPS539750A (en) | 1978-01-28 |
FR2357532A1 (fr) | 1978-02-03 |
DE2631168A1 (de) | 1978-01-12 |
FR2357532B1 (es) | 1980-10-17 |
DE2631168B2 (de) | 1979-03-08 |
BE856617A (fr) | 1978-01-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19990601 |