GB1315813A - Manufacture of organic isocyanates from nitro and nitroso compounds - Google Patents
Manufacture of organic isocyanates from nitro and nitroso compoundsInfo
- Publication number
- GB1315813A GB1315813A GB1315813DA GB1315813A GB 1315813 A GB1315813 A GB 1315813A GB 1315813D A GB1315813D A GB 1315813DA GB 1315813 A GB1315813 A GB 1315813A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitroso compounds
- manganese oxide
- alkali metal
- nitro
- aromatic isocyanates
- 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
- C07C263/14—Preparation of derivatives of isocyanic acid by catalytic reaction of nitro compounds with carbon monoxide
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1315813 Aromatic isocyanates IMPERIAL CHEMICAL INDUSTRIES Ltd 26 May 1970 [4 June 1969] 28198/69 Heading C2C Aromatic isocyanates are prepared by reacting aromatic nitro or nitroso compounds with carbon monoxide which is free from hydrogen or water vapour, but may contain an inert carrier gas, in the presence of a catalyst of at least one noble metal selected from Ru, Rh, Pd, Os, Ir and Pt or a compound thereof, in admixture with a composition obtained by contacting a manganese oxide precipitate containing bound alkali metal with an aqueous solution of salts of one or more heavy metals, that is Ti, V, Cr, Fe, Co, Ni, Cu, Zr, Mo, Ag, Su, Sb, Ta, W, Re, Au, Hg, Tl, Pb, Bi, whereby to replace the alkali metal in said precipitate by said heavy metal and thereafter separating the solid from the liquid phase and drying it. The manganese oxide composition is preferably formed in the presence of an inert insoluble substance which will act as a catalyst support, e.g. kieselguhr, silica &c. Suitable starting materials include nitrobenzene, nitrotoluenes, nitroanisoles, fluoro-, chloro-, bromo- or iodonitro benzenes, ethyl pnitrobenzoate, α-nitronaphthalene m-benzonitrile, 3-nitrodiphenyl, 4-nitrodiphenylether, nitroacetophenone, dinitrobenzenes and the corresponding nitroso compounds.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2819869 | 1969-06-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1315813A true GB1315813A (en) | 1973-05-02 |
Family
ID=10271852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1315813D Expired GB1315813A (en) | 1969-06-04 | 1969-06-04 | Manufacture of organic isocyanates from nitro and nitroso compounds |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU1587970A (en) |
| GB (1) | GB1315813A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018185168A1 (en) * | 2017-04-05 | 2018-10-11 | Basf Se | Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates |
-
1969
- 1969-06-04 GB GB1315813D patent/GB1315813A/en not_active Expired
-
1970
- 1970-06-03 AU AU15879/70A patent/AU1587970A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018185168A1 (en) * | 2017-04-05 | 2018-10-11 | Basf Se | Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates |
| CN110719905A (en) * | 2017-04-05 | 2020-01-21 | 巴斯夫欧洲公司 | Heterogeneous catalyst for the direct carbonylation of nitroaromatics to isocyanates |
| CN110719905B (en) * | 2017-04-05 | 2022-10-28 | 巴斯夫欧洲公司 | Heterogeneous catalyst for the direct carbonylation of nitroaromatics to isocyanates |
| US11512046B2 (en) | 2017-04-05 | 2022-11-29 | Basf Se | Heterogeneous catalysts for the direct carbonylation of nitro aromatic compounds to isocyanates |
Also Published As
| Publication number | Publication date |
|---|---|
| AU1587970A (en) | 1971-12-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |