US4353843A
Expired / Lapsed
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Preparation of nitrite esters
Assignee: Union Carbide Corp
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Filing: 1981-03-12
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Granted: 1982-10-12
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Expires: 2001-03-12
Abstract
Abstract A vapor phase process for making methyl or ethyl nitrite from methanol or ethanol, respectively, by reacting a nitrogen oxide composition with methanol or ethanol.
Inventors
- 👤 Arthur R. Doumaux, Jr.
- 👤 James M. Downey
- 👤 Joseph P. Henry
- 👤 John M. Hurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:19
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/04
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
111 words
The process for making methyl or ethyl nitrite from methanol or ethanol, respectively, which comprises reacting in a reaction zone a molar amount of nitrogen oxide composition containing a nitric oxide to nitrogen dioxide molar ratio of greater than 1, in the vapor state, with a molar amount of vaporized methanol or ethanol wherein the molar ratio of methanol or ethanol to the combined molar amount of nitric oxide and nitrogen dioxide is greater than one, in the presence of an inert gaseous diluent for said reaction, at a temperature of between about 10° C. to about 300° C. for a period of time sufficient to form methyl or ethyl nitrite.
Claim 2
Dependent Claim
111 words
The process for making methyl or ethyl nitrite from methanol or ethanol, respectively, which comprises reacting in a reaction zone a molar amount of nitrogen oxide composition containing a nitric oxide to nitrogen dioxide molar ratio of greater than 1, in the vapor state, with a molar amount of vaporized methanol or ethanol wherein the molar ratio of methanol or ethanol to the combined molar amount of nitric oxide and nitrogen dioxide is greater than one, in the presence of an inert gaseous diluent for said reaction, at a temperature of between about 10° C. to about 300° C. for a period of time sufficient to form methyl or ethyl nitrite.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the inert gaseous diluent is nitrogen.
Claim 4
Dependent Claim
13 words
The process of claim 1 wherein the inert gaseous diluent is carbon dioxide.
Claim 5
Dependent Claim
27 words
The process of claim 2 or 3 wherein the inert gaseous diluent is present in an amount between about 1 percent and about 99 percent by volume.
Claim 6
Dependent Claim
25 words
The process of claim 4 wherein the inert gaseous diluent is present in an amount between about 30 percent and about 90 percent by volume.
Claim 7
Dependent Claim
31 words
The process of claim 1 wherein the nitrogen oxide comprises nitric oxide and molecular oxygen in a molar ratio of nitric oxide to molecular oxygen of greater than 4 to 1.
Claim 8
Dependent Claim
15 words
The process of claim 1 wherein said process is carried out under essentially anhydrous conditions.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein the process makes methyl nitrite from methanol.
Claim 10
Dependent Claim
13 words
The process of claim 1 wherein the process makes ethyl nitrite from ethanol.
Claim 11
Dependent Claim
17 words
The process of claim 1 wherein the temperature is between about 20° C. and about 130° C.
Claim 12
Dependent Claim
18 words
The process of claim 10 wherein the temperature is between about 70° C. and less than 110° C.
Claim 13
Dependent Claim
18 words
The process of claim 1 wherein the process is carried out at atmospheric (14.7 psia) or superatmospheric pressure.
Claim 14
Dependent Claim
18 words
The process of claim 12 wherein the pressure is between about atmospheric (14.7 psia) and about 100 psia.
Claim 15
Dependent Claim
17 words
The process of claim 13 wherein the pressure is between about 20 psia and about 60 psia.
Claim 16
Dependent Claim
42 words
The process of claim 1 wherein the molar ratio of nitric oxide to nitrogen dioxide and the molar ratio of methanol to ethanol to combined molar amount of nitric oxide and nitrogen are each, respectively, between greater than 1 to about 10.
Claim 17
Dependent Claim
19 words
The process of claim 15 wherein the molar ratios are each, respectively, between greater than 1 to about 2.
Claim 18
Dependent Claim
19 words
The process of claim 16 wherein the molar ratios are each, respectively, between greater than 1 to about 1.5.
Claim 19
Dependent Claim
18 words
The process of claim 1 wherein at least a portion of the inert gaseous diluent is carbon monoxide.
Claim 20
Dependent Claim
94 words
The process for making methyl or ethyl nitrite in the vapor state wherein: (a) methanol or ethanol is introduced under pressure into a body having an internal volume; (b) said alcohol is vaporized; (c) a nitrogen oxide having a nitric oxide to nitrogen dioxide ratio greater than 1 is introduced under pressure into said body; (d) the resulting mixture of steps (a), (b) and (c) is characterized as having a molar ratio of methanol or ethanol to nitrogen oxides of greater than 1; and (e) removing said methyl or ethyl nitrite from said body.
Claim 21
Dependent Claim
94 words
The process for making methyl or ethyl nitrite in the vapor state wherein: (a) methanol or ethanol is introduced under pressure into a body having an internal volume; (b) said alcohol is vaporized; (c) a nitrogen oxide having a nitric oxide to nitrogen dioxide ratio greater than 1 is introduced under pressure into said body; (d) the resulting mixture of steps (a), (b) and (c) is characterized as having a molar ratio of methanol or ethanol to nitrogen oxides of greater than 1; and (e) removing said methyl or ethyl nitrite from said body.
Claim 22
Dependent Claim
17 words
The process of claim 19 wherein the unreacted alcohol and water are removed in a step (f).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |