EP0425197B1
Expired / Lapsed
EP
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Process for preparing diester of carbonic acid
Assignee: Ube Corp
•
Filing: 1990-10-18
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Granted: 1994-06-01
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Expires: 2010-10-18
Abstract
No abstract record available.
Inventors
- 👤 Keigo C/O Ube Chemical Factory Nishihira
- 👤 Katsuhiko C/O Ube Chemical Factory Mizutare
- 👤 Shuji C/O Ube Chemical Factory Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 02:18
CPC Classifications
C; C07; C07C; C07C68/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
62 words
A process for preparing a diester of carbonic acid which comprises bringing carbon monoxide into contact with a nitrite in a vapor phase in the presence of a solid catalyst having (a) a platinum group metal or a compound thereof and (b) at least one selected from the group consisting of iron, copper, bismuth, cobalt, nickel and tin carried on a carrier.
Claim 2
Dependent Claim
62 words
A process for preparing a diester of carbonic acid which comprises bringing carbon monoxide into contact with a nitrite in a vapor phase in the presence of a solid catalyst having (a) a platinum group metal or a compound thereof and (b) at least one selected from the group consisting of iron, copper, bismuth, cobalt, nickel and tin carried on a carrier.
Claim 3
Dependent Claim
43 words
The process according to Claim 1, wherein said nitrite is selected from the group consisting of a nitrite of a lower aliphatic monohydric alcohol having 1 to 4 carbon atoms, a nitrite of an alicyclic alcohol and a nitrite of an aralkyl alcohol.
Claim 4
Dependent Claim
37 words
The process according to Claim 2, wherein said nitrite is selected from the group consisting of methyl nitrite, ethyl nitrite, n-propyl nitrite, isopropyl nitrite, n-butyl nitrite, isobutyl nitrite, sec-butyl nitrite, cyclohexyl nitrite, benzyl nitrite and phenylethyl nitrite.
Claim 5
Dependent Claim
24 words
The process according to Claim 2, wherein said nitrite is a nitrite of a lower aliphatic monohydric alcohol having 1 to 4 carbon atoms.
Claim 6
Dependent Claim
15 words
The process according to Claim 4, wherein said nitrite is methyl nitrite or ethyl nitrite.
Claim 7
Dependent Claim
36 words
The process according to Claim 1, wherein an amountof a catalyst component (a) to be carried on a carrier is 0.1 to 10 % by weight in terms of a metal of the platinum group metal.
Claim 8
Dependent Claim
21 words
The process according to Claim 6, wherein an amount of the catalyst component (a) is 0.5 to 2 % by weight.
Claim 9
Dependent Claim
34 words
The process according to Claim 1, wherein an amountof a catalyst component (b) to be carried on a carrier is 1 to 50 gram atomic equivalents in terms of an amount of the metal.
Claim 10
Dependent Claim
21 words
The process according to Claim 8, wherein an amount of the catalyst component (b) is 1 to 10 gram atomic equivalents.
Claim 11
Dependent Claim
32 words
The process according to Claim 1, wherein said compound of the platinum group metal is selected from the group consisting of halides, nitrates, sulfates, phosphates, acetates, oxalates and benzoates of said metals.
Claim 12
Dependent Claim
52 words
The process according to Claim 10, wherein said compound of the platinum group metal is selected from the group consisting of palladium bromide, palladium iodide, palladium fluoride, palladium nitrate, palladium sulfate, palladium phosphate, palladium acetate, palladium oxalate, palladium benzoate, ruthenium iodide, rhodium bromide, rhodium iodide, rhodium nitrate, rhodium sulfate and rhodium acetate.
Claim 13
Dependent Claim
22 words
The process according to Claim 1, wherein said compound of a platinum group metal is a chloride of the platinum group metal.
Claim 14
Dependent Claim
27 words
The process according to Claim 12, wherein said chloride is selected from the group consisting of palladium chloride, platinum chloride, iridium chloride, ruthenium chloride and rhodium chloride.
Claim 15
Dependent Claim
22 words
The process according to Claim 12, wherein the reaction is carried out in the presence of a minute amount of hydrogen chloride.
Claim 16
Dependent Claim
29 words
The process according to Claim 14, wherein an amount of hydrogen chloride is 1 to 50 mole % per unit time based on the platinum metal in the catalyst.
Claim 17
Dependent Claim
23 words
The process according to Claim 1, wherein the reaction is carried out at a temperature of 50 to 120 °C under normal pressure.
Claim 18
Dependent Claim
30 words
The process according to Claim 1, wherein the reaction is carried out at a temperature of 50 to 150 °C under a pressure of 1 to 20 kg/cm 2 G.
Claim 19
Dependent Claim
46 words
The process according to Claim 1, wherein carbon monoxide and a nitrite are fed in the vapor phase reaction system with a concentration of carbon monoxide of 5 to 20 % by volume and a concentration of the nitrite of 20 % by volume or less.
Claim 20
Dependent Claim
28 words
The process according to Claim 18, wherein a ratio of carbon monoxide and a nitrite is 0.1 to 10 mole of carbon monoxide per mole of the nitrite.
Claim 21
Dependent Claim
33 words
The process according to Claim 19, wherein a space velocity of a gas containing carbon monoxide and a nitrite to be fed in the reaction system is 500 to 20000 hr- 1 .
Claim 22
Dependent Claim
21 words
The process according to Claim 1, wherein a catalyst component (b) is halides, nitrates, sulfates, phosphates or acetates of said metals.
References Cited (Backward Citations)
No citation records indexed.
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