GB1164519A - Method for preparing Toluylenediisocyanates from Dinitrotoluenes - Google Patents
Method for preparing Toluylenediisocyanates from DinitrotoluenesInfo
- Publication number
- GB1164519A GB1164519A GB3311767A GB3311767A GB1164519A GB 1164519 A GB1164519 A GB 1164519A GB 3311767 A GB3311767 A GB 3311767A GB 3311767 A GB3311767 A GB 3311767A GB 1164519 A GB1164519 A GB 1164519A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dinitrotoluenes
- toluylenediisocyanates
- preparing
- july
- toluylene diisocyanates
- 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
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
- C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
- C07C209/36—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/10—Preparation of derivatives of isocyanic acid by reaction of amines with carbonyl halides, e.g. with phosgene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,164,519. Toluylene diisocyanates. INSTYTUT CHEMII OGOLNEJ. 19 July, 1967 [19 July, 1966], No. 33117/67. Heading C2C. Toluylene diisocyanates are produced from dinitrotoluenes by a method comprising reducing dinitrotoluenes in liquid phase with hydrogen at elevated temperatures and pressures in the presence of catalysts and in o-dichlorobenzene as solvent and after separating the catalyst and freeing from water by distillation, treating the reaction mixture with phosgene by known methods in the same reaction medium.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL115703A PL55342B1 (en) | 1966-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1164519A true GB1164519A (en) | 1969-09-17 |
Family
ID=19949504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3311767A Expired GB1164519A (en) | 1966-07-19 | 1967-07-19 | Method for preparing Toluylenediisocyanates from Dinitrotoluenes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1164519A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0757034A1 (en) * | 1995-08-04 | 1997-02-05 | Bayer Ag | Process for the preparation of toluylenediisocyanate, special mixtures from toluylenediamine and water and their use for the preparation of toluylenediisocyanate |
-
1967
- 1967-07-19 GB GB3311767A patent/GB1164519A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0757034A1 (en) * | 1995-08-04 | 1997-02-05 | Bayer Ag | Process for the preparation of toluylenediisocyanate, special mixtures from toluylenediamine and water and their use for the preparation of toluylenediisocyanate |
US5849947A (en) * | 1995-08-04 | 1998-12-15 | Bayer Aktiengesellschaft | Process for the preparation of toluylene diisocyanate, specific mixtures of toluylene diamine and water, and the use of toluylene diamine and water mixtures to prepare toluylene diisocyanate |
EP1090906A1 (en) * | 1995-08-04 | 2001-04-11 | Bayer Ag | Mixtures of toluene diamine and water |
CN1070474C (en) * | 1995-08-04 | 2001-09-05 | 拜尔公司 | Process for toluene diisocyanate and specific mixture of tolylene diamine and water and use in preparing toluene diisocyanate |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |