BE796382A - Aromatic isocyanates - obtd. from aromatic nitro cpd and CO in presence of P CONTG. CATALYST - Google Patents
Aromatic isocyanates - obtd. from aromatic nitro cpd and CO in presence of P CONTG. CATALYSTInfo
- Publication number
- BE796382A BE796382A BE128461A BE128461A BE796382A BE 796382 A BE796382 A BE 796382A BE 128461 A BE128461 A BE 128461A BE 128461 A BE128461 A BE 128461A BE 796382 A BE796382 A BE 796382A
- Authority
- BE
- Belgium
- Prior art keywords
- aromatic
- cpd
- catalyst
- contg
- isocyanates
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/14—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)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Aromatic org. isocyanates are made by reacting an aromatic nitro cpd. and carbon monoxide in the pres. of a catalyst comprising a cpd. of a metal of the Pt group, an aromatic N-contg. heterocyclic cpd. and a cpd. with active H pref. chosen from water, H2, hydrogen halides, boric acids, formic acid, oxalic acid and/or formaldehyde. Pref. nitro cpds. such as nitrobenzene, dinitrobenzenes, p-nitrotoluene, dinitrotoluenes, dinitrometaxylenes, etc., are reacted under partial CO pressures of 10-1500 a tm. at 100-250 degrees C e.G. for 1/2-10 hrs. in the pres. of a catalyst such as bis(pyridine)-palladium chloride and water. Process gives high yields of isocyanate cpds. together with rapid conversions. Products are useful for the prodn. of polyurethane foams and elastomers.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2369972A JPS5025468B2 (en) | 1972-03-07 | 1972-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE796382A true BE796382A (en) | 1973-09-07 |
Family
ID=12117632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE128461A BE796382A (en) | 1972-03-07 | 1973-03-07 | Aromatic isocyanates - obtd. from aromatic nitro cpd and CO in presence of P CONTG. CATALYST |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5025468B2 (en) |
| BE (1) | BE796382A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625248Y2 (en) * | 1975-07-03 | 1981-06-15 | ||
| JPS56149470U (en) * | 1981-03-23 | 1981-11-10 | ||
| JP2019050316A (en) | 2017-09-11 | 2019-03-28 | 東芝メモリ株式会社 | SEM inspection apparatus and pattern matching method |
-
1972
- 1972-03-07 JP JP2369972A patent/JPS5025468B2/ja not_active Expired
-
1973
- 1973-03-07 BE BE128461A patent/BE796382A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4891036A (en) | 1973-11-27 |
| JPS5025468B2 (en) | 1975-08-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Patent lapsed |
Owner name: SUMITOMO CHEMICAL CY LTD Effective date: 19860331 |