GB1083910A - Distillation of organic polyisocyanates - Google Patents
Distillation of organic polyisocyanatesInfo
- Publication number
- GB1083910A GB1083910A GB4120165A GB4120165A GB1083910A GB 1083910 A GB1083910 A GB 1083910A GB 4120165 A GB4120165 A GB 4120165A GB 4120165 A GB4120165 A GB 4120165A GB 1083910 A GB1083910 A GB 1083910A
- Authority
- GB
- United Kingdom
- Prior art keywords
- distillation
- thin film
- organic polyisocyanates
- polyisocyanates
- polyoxypropylated
- 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
Polyisocyanates are isolated from crude mixtures by mixing the latter with a polyalkylene polyether and distilling the polyisocyanate from an agitated thin film of the resultant mixture. In examples, tolylene diisocyanate is thus obtained from a tolylenediamine phosgenation product in o-dichlorobenzene, by addition of polyoxypropylated-isooctanol or -butanol; and distillation from a wiped-wall thin film evaporator.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1495259D FR1495259A (en) | 1965-09-28 | ||
GB4120165A GB1083910A (en) | 1965-09-28 | 1965-09-28 | Distillation of organic polyisocyanates |
NL6613340A NL6613340A (en) | 1965-09-28 | 1966-09-21 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4120165A GB1083910A (en) | 1965-09-28 | 1965-09-28 | Distillation of organic polyisocyanates |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1083910A true GB1083910A (en) | 1967-09-20 |
Family
ID=10418585
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4120165A Expired GB1083910A (en) | 1965-09-28 | 1965-09-28 | Distillation of organic polyisocyanates |
Country Status (3)
Country | Link |
---|---|
FR (1) | FR1495259A (en) |
GB (1) | GB1083910A (en) |
NL (1) | NL6613340A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002012209A1 (en) * | 2000-08-10 | 2002-02-14 | Bayer Cropscience Ag | Method for purifying 2-chloro-5-chloromethyl thiazole |
WO2004031132A1 (en) * | 2002-09-27 | 2004-04-15 | Basf Aktiengesellschaft | Reprocessing of reaction material discharged from phosgenation reactors |
US7531067B2 (en) * | 2004-03-22 | 2009-05-12 | Toyo Kasei Kogyo Company, Limited | Process for purification of 2-chloro-5-chloromethyl-1,3-thiazole |
WO2018134238A1 (en) * | 2017-01-18 | 2018-07-26 | Covestro Deutschland Ag | Method for extracting diisocyanates from distillation residues |
EP3597632A1 (en) * | 2018-07-18 | 2020-01-22 | Covestro Deutschland AG | Method for recovering diisocyantes from distillation remnants |
-
0
- FR FR1495259D patent/FR1495259A/fr not_active Expired
-
1965
- 1965-09-28 GB GB4120165A patent/GB1083910A/en not_active Expired
-
1966
- 1966-09-21 NL NL6613340A patent/NL6613340A/xx unknown
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6955744B2 (en) | 2000-08-10 | 2005-10-18 | Bayer Cropscience Ag | Method for purifying 2-chloro-5-chloromethylthiazole |
KR100812657B1 (en) | 2000-08-10 | 2008-03-13 | 바이엘 크롭사이언스 아게 | Method for purifying 2-chloro-5-chloromethyl thiazole |
WO2002012209A1 (en) * | 2000-08-10 | 2002-02-14 | Bayer Cropscience Ag | Method for purifying 2-chloro-5-chloromethyl thiazole |
US7592479B2 (en) | 2002-09-27 | 2009-09-22 | Basf Aktiengesellschaft | Reprocessing of reaction material discharged from phosgenation reactors |
WO2004031132A1 (en) * | 2002-09-27 | 2004-04-15 | Basf Aktiengesellschaft | Reprocessing of reaction material discharged from phosgenation reactors |
US7846304B2 (en) | 2004-03-22 | 2010-12-07 | Toyo Boseki Kabushiki Kaisha | Process for purification of 2-chloro-5-chloromethyl-1,3-thiazole |
US7531067B2 (en) * | 2004-03-22 | 2009-05-12 | Toyo Kasei Kogyo Company, Limited | Process for purification of 2-chloro-5-chloromethyl-1,3-thiazole |
WO2018134238A1 (en) * | 2017-01-18 | 2018-07-26 | Covestro Deutschland Ag | Method for extracting diisocyanates from distillation residues |
CN110167913A (en) * | 2017-01-18 | 2019-08-23 | 科思创德国股份有限公司 | The method of diisocyanate is recycled from bottoms |
EP3597632A1 (en) * | 2018-07-18 | 2020-01-22 | Covestro Deutschland AG | Method for recovering diisocyantes from distillation remnants |
WO2020016142A1 (en) * | 2018-07-18 | 2020-01-23 | Covestro Deutschland Ag | Method for recovering diisocyanates from distillation residues |
CN112384496A (en) * | 2018-07-18 | 2021-02-19 | 科思创德国股份有限公司 | Process for recovering diisocyanates from distillation residues |
CN112384496B (en) * | 2018-07-18 | 2024-02-02 | 科思创德国股份有限公司 | Method for recovering diisocyanate from distillation residue |
Also Published As
Publication number | Publication date |
---|---|
NL6613340A (en) | 1967-03-29 |
FR1495259A (en) | 1967-12-18 |
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