BR9712749A - Processo para separação de isÈmeros de isocianato - Google Patents
Processo para separação de isÈmeros de isocianatoInfo
- Publication number
- BR9712749A BR9712749A BR9712749-3A BR9712749A BR9712749A BR 9712749 A BR9712749 A BR 9712749A BR 9712749 A BR9712749 A BR 9712749A BR 9712749 A BR9712749 A BR 9712749A
- Authority
- BR
- Brazil
- Prior art keywords
- separation
- isomers
- crystals
- isocyanate isomers
- isocyanate
- Prior art date
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)
- Saccharide Compounds (AREA)
Abstract
Patente de Invenção:<B>"PROCESSO PARA SEPARAçãO DE ISÈMEROS DE ISOCIANATO"<D>. é descrito um processo para a obtenção de isómeros de isocianato puros de uma mistura de isómeros de isocianato por cristalização de suspensão e o isolamento de cristais isomericamente puros, que é caracterizado pelo fato de que, antes do isolamento dos cristais, 5 a 40% em peso dos cristais produzidos são refundidos enquanto simultaneamente é aumentada a temperatura da pasta fluida de cristal em 4,5 a 9‹C.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19645659A DE19645659A1 (de) | 1996-11-06 | 1996-11-06 | Verfahren zur Isomerentrennung von Isocyanaten |
PCT/EP1997/005884 WO1998019993A1 (de) | 1996-11-06 | 1997-10-24 | Verfahren zur isomerentrennung von isocyanaten |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9712749A true BR9712749A (pt) | 1999-10-19 |
Family
ID=7810756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9712749-3A BR9712749A (pt) | 1996-11-06 | 1997-10-24 | Processo para separação de isÈmeros de isocianato |
Country Status (9)
Country | Link |
---|---|
US (1) | US6271414B1 (pt) |
EP (1) | EP0937033B1 (pt) |
JP (1) | JP2001503419A (pt) |
AU (1) | AU5051798A (pt) |
BR (1) | BR9712749A (pt) |
DE (2) | DE19645659A1 (pt) |
ES (1) | ES2180955T3 (pt) |
TW (1) | TW402584B (pt) |
WO (1) | WO1998019993A1 (pt) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004018048A1 (de) * | 2004-04-08 | 2005-11-10 | Henkel Kgaa | Verfahren zur Herstellung von Polyurethan-Prepolymeren |
CN109970604B (zh) * | 2019-04-25 | 2021-03-19 | 青岛科技大学 | 一种提纯2,4-甲苯二异氰酸酯的工艺 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3144474A (en) * | 1964-08-11 | Purification process for isocyanates | ||
US2831012A (en) * | 1957-03-29 | 1958-04-15 | Du Pont | Chemical process |
US3232069A (en) * | 1962-02-01 | 1966-02-01 | Phillips Petroleum Co | Cooling control in fractional crystal-lization responsive to solids measurement |
US3217024A (en) * | 1963-03-22 | 1965-11-09 | Allied Chem | Conversion of mixtures of 2, 4-and 2, 6-toluene diisocyanates to other mixtures of different isomer ratio |
US3591617A (en) * | 1968-03-07 | 1971-07-06 | Lummus Co | Purification of toluene diisocyanate |
US4004886A (en) | 1969-12-12 | 1977-01-25 | Stamicarbon B.V. | Two stage continuous process and apparatus for crystallization |
US3777892A (en) | 1971-01-27 | 1973-12-11 | H Thijssen | Apparatus for the separation and treatment of solid particles from a liquid suspension |
US3872009A (en) | 1971-06-25 | 1975-03-18 | Henricus Alexis Corne Thijssen | Apparatus for the separation and treatment of solid particles from a liquid suspension |
US4246187A (en) * | 1979-07-17 | 1981-01-20 | E. I. Du Pont De Nemours And Company | Separation of 2,4-tolylene diisocyanate from mixtures of 2,4- and 2,6-tolylene diisocyanate |
US4316368A (en) | 1980-10-30 | 1982-02-23 | Grasso's Koniklijke Machinefabrieken, N.V. | Multi-stage counter-current concentrating method |
US4430104A (en) | 1980-10-30 | 1984-02-07 | Grasso's Koniklijke Machine Fabrieken, N.V. | Multi-stage countercurrent concentrating system and method and separator |
US4459144A (en) | 1980-10-30 | 1984-07-10 | Grasso's Koniklijke Machine Fabrieken, N.V. | Multi-stage counter-current concentration system and method |
DE3220439A1 (de) * | 1982-05-29 | 1983-12-01 | Bayer Ag, 5090 Leverkusen | Verfahren zur abtrennung von technisch reinem 2,4-diisocyanatotoluol oder von, einen erhoehten gehalt an 2,4-diisocyanatotoluol aufweisenden, isomerengemischen von, im wesentlichen aus 2,4- und 2,6-diisocyanatotoluol bestehenden, isomerengemischen |
US4787985A (en) * | 1987-08-25 | 1988-11-29 | Grenco Process Technology B.V. | Multi-stage purification unit process |
FR2717800B1 (fr) * | 1994-03-25 | 1996-05-31 | Rhone Poulenc Chimie | Obtention de 2.6-toluylene diisocyanate à partir d'un mélange comprenant du 2.6-toluylene diisocyanate et du 2.4-toluylene diisocyanate. |
-
1996
- 1996-11-06 DE DE19645659A patent/DE19645659A1/de not_active Withdrawn
-
1997
- 1997-10-24 DE DE59708080T patent/DE59708080D1/de not_active Expired - Fee Related
- 1997-10-24 ES ES97913174T patent/ES2180955T3/es not_active Expired - Lifetime
- 1997-10-24 US US09/297,350 patent/US6271414B1/en not_active Expired - Fee Related
- 1997-10-24 EP EP97913174A patent/EP0937033B1/de not_active Expired - Lifetime
- 1997-10-24 WO PCT/EP1997/005884 patent/WO1998019993A1/de active IP Right Grant
- 1997-10-24 AU AU50517/98A patent/AU5051798A/en not_active Abandoned
- 1997-10-24 JP JP52100298A patent/JP2001503419A/ja active Pending
- 1997-10-24 BR BR9712749-3A patent/BR9712749A/pt not_active Application Discontinuation
- 1997-11-04 TW TW086116295A patent/TW402584B/zh not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
EP0937033B1 (de) | 2002-08-28 |
MX9904140A (pt) | 1999-12-01 |
TW402584B (en) | 2000-08-21 |
DE59708080D1 (de) | 2002-10-02 |
JP2001503419A (ja) | 2001-03-13 |
AU5051798A (en) | 1998-05-29 |
DE19645659A1 (de) | 1998-05-07 |
ES2180955T3 (es) | 2003-02-16 |
WO1998019993A1 (de) | 1998-05-14 |
EP0937033A1 (de) | 1999-08-25 |
US6271414B1 (en) | 2001-08-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BR0308292A (pt) | Processo para aperfeiçoar a pureza e o rendimento da sucralose | |
BR0109929A (pt) | Processo para a purificação de uma massa fundida de ácido acrìlico bruto | |
BRPI0410746A (pt) | compostos e composições imunossupressoras | |
BR9714155A (pt) | Prevenção da perda e reposição da massa óssea por certos agonistas de prostaglandina. | |
KR900014287A (ko) | 1,1,1,2- 테트라 플루오로에탄의 정제방법 | |
BR9709259A (pt) | Composição e processo de inibição de germinação em batatas | |
BRPI0508973A (pt) | método para a purificação de um metal fundido | |
BR9912344A (pt) | Processo para a preparação de ácido acrìlico. | |
FI59416B (fi) | Foerfarande foer utvinning av beta-sitosterol ur en sterolblandning utvunnen fraon raosaopans neutralfraktion | |
BR9914733A (pt) | Conjunto vibrador | |
BR9712749A (pt) | Processo para separação de isÈmeros de isocianato | |
PT994880E (pt) | Macrolidos cristalinos e processos para a sua preparacao | |
IL67969A0 (en) | Novel crystal modifications of(+)-catechin,their production and pharmaceutical compositions containing them | |
PT1011838E (pt) | Processo de separacao | |
ES2115166T3 (es) | Separacion por adsorcion mejorada de meta-xileno a partir de hidrocarburos aromaticos. | |
BRPI0408403A (pt) | pó cristalino de triidrato de amoxicilina | |
DK0658585T3 (da) | Amidinophenylalaninderivater, fremgangsmåde til deres fremstilling, deres anvendelse og midler indeholdende disse som antik | |
BR0211030A (pt) | Derivado de pirrolidina oxadiazole, uso de um derivado de pirrolidina oxadiazole, composição farmacêutica contendo pelo menos um derivado de pirrolidina oxadiazole, método para preparação de um composto de pirrolidina oxadiazole | |
BR9713571A (pt) | Processo para a cristalização por suspensão. | |
BR0318130A (pt) | Purificação de 1,3-propanodiol por destilação | |
ES2151144T3 (es) | Procedimiento para la purificacion de pentafluoretano. | |
MX9307479A (es) | Uso de ciertos derivados de acido metanobisfosfonico en la curacion de fracturas. | |
BR0314848A (pt) | Métodos de precipitação de cristais | |
KR950008450A (ko) | 디클로로벤젠 이성질체의 혼합물로부터 m-디클로로벤젠을 분리하는 방법 | |
ES2115317T3 (es) | Procedimiento para purificar un bisfenol. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FB34 | Technical and formal requirements: requirement - article 34 of industrial property law | ||
FA14 | Dismissal: dismissal - article 34 of industrial property law | ||
B11T | Dismissal: dismissal of application maintained |