US4267070A
Expired / Lapsed
US
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Catalyst for the synthesis of aromatic monoisocyanates
Assignee: Individual
•
Filing: 1979-10-30
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Granted: 1981-05-12
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Expires: 1999-10-30
Abstract
Abstract A catalyst for the synthesis of aromatic monoisocyanates comprising 1.64 to 16.6% by weight of palladium chloride, 0.16 to 47.6% by weight of an oxide of a metal of Group VB of the periodic system, 1.5 to 81.8% by weight of an oxide of a metal of Group VI B of the periodic system, 1.64 to 89.8% by weight of pyridine or an alkylsubstituted pyridine. The use of the catalyst according to the invention in the synthesis of aromatic monoisocyanates makes it possible to obtain a high degree of conversion of the starting compound of up to 100%, a high yield of the desired product of up to 97%, and increased productivity of the catalyst of up to 40 g of the desired product per g of PdCl 2 per hour.
Inventors
- 👤 Boris K. Nefedov
- 👤 Vladimir I. Manov-Juvensky
- 👤 Jury I. Dergunov
- 👤 Anatoly I. Rysikhin
- 👤 Alexandr L. Chimishkian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:02
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0235; B01J31/0244; B01J27/00; B01J27/06; B01J27/08; B01J27/10; B01J31/26; B01J31/28; B01J31/30; B01J31/34; B01J31/36; B01J2231/00; B01J2231/30; B01J2231/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
A catalyst for the synthesis of aromatic monoisocyanates consisting of 1.64 to 16.6% by weight of palladium chloride, 0.16 to 47.6% by weight of an oxide of a metal of Group V B of the periodic system, 1.5 to 81.8% by weight of an oxide of a metal of Group VI B of the periodic system, 1.64 to 89.8% by weight of pyridine or an alkyl-substituted pyridine.
Claim 2
Dependent Claim
67 words
A catalyst for the synthesis of aromatic monoisocyanates consisting of 1.64 to 16.6% by weight of palladium chloride, 0.16 to 47.6% by weight of an oxide of a metal of Group V B of the periodic system, 1.5 to 81.8% by weight of an oxide of a metal of Group VI B of the periodic system, 1.64 to 89.8% by weight of pyridine or an alkyl-substituted pyridine.
Claim 3
Dependent Claim
21 words
The catalyst of claim 1, wherein the Group V B metal is vanadium and the Group VI B metal is molybdenum.
Claim 4
Dependent Claim
21 words
The catalyst of claim 1, wherein the Group V B metal is tantalum and the Group VI B metal is molybdenum.
Claim 5
Dependent Claim
21 words
The catalyst of claim 1, wherein the Group V B metal is niobium and the Group VI B metal is molybdenum.
Claim 6
Dependent Claim
21 words
The catalyst of claim 1, wherein the Group V B metal is vanadium and the Group VI B metal is tungsten.
References Cited (Backward Citations)
US3576835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-11 | 1984-11-10 | 1985-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-11 | 1988-11-10 | 1989-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-11 | 1992-11-10 | 1993-05-12 | $7700.00 | Window Closed / Lapsed |