CA1096884A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Process for the manufacture of formaldehyde and methanol by oxidation of methane
Assignee: Huels AG
•
Filing: 1978-09-21
•
Granted: 1981-03-03
•
Expires: 1998-09-21
Abstract
Abstract ABSTRACT OF THE DISCLOSURE The invention is a process for the oxidation of methane to methanol and formaldehyde in a combustion tube under pressure. Preheated methane or a methane inert gas mixture is introduced into a combustion tube and oxidising gas, for example air, is introduced concentrically into the combustion tube for reaction with the methane. The methane stream has a velocity of from 1 to 15m. sec-1, the oxidising gas stream has a velocity from 50 to 300m. sec-1 greater than the velocity of the methane stream, and the volume of the methane stream is from 3 to 100 times greater than that of the stream of oxidising gas.
Inventors
- 👤 Rudolf Brockhaus
- 👤 Hans-Jurgen Franke
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-05 01:16
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/48; C07C29/50; C07C45/00; C07C45/27; C07C45/32; C07C45/33
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
158 words
A process for the oxidation of methane to methanol and formalde-hyde which comprises passing methane or a mixture of methane and an inert gas which has been heated to a temperature in the range of from 300° to 600°C and an oxidising gas at a pressure greater than about 5 bars through a combustion tube in which reaction occurs, cooling the reaction mixture and separating products therefrom, wherein the oxidising gas is introduced concentrically into the combustion tube, the velocity of the methane or mixture of methane and inert gas in the combustion tube is in the range of from 1 to 15 m.sec-1, the velocity of the oxidising gas is from 50 to 300m. sec-1 greater than the velocity of the methane or methane and inert gas mixture and the volume of the stream of methane or methane and inert gas mixture is from 3 to 100 times greater than that of the stream of oxidising gas.
Claim 2
Dependent Claim
158 words
A process for the oxidation of methane to methanol and formalde-hyde which comprises passing methane or a mixture of methane and an inert gas which has been heated to a temperature in the range of from 300° to 600°C and an oxidising gas at a pressure greater than about 5 bars through a combustion tube in which reaction occurs, cooling the reaction mixture and separating products therefrom, wherein the oxidising gas is introduced concentrically into the combustion tube, the velocity of the methane or mixture of methane and inert gas in the combustion tube is in the range of from 1 to 15 m.sec-1, the velocity of the oxidising gas is from 50 to 300m. sec-1 greater than the velocity of the methane or methane and inert gas mixture and the volume of the stream of methane or methane and inert gas mixture is from 3 to 100 times greater than that of the stream of oxidising gas.
Claim 3
Dependent Claim
36 words
A process according to claim 1 wherein the velocity of the stream of oxidising gas is from 75 to 250m. sec-1 higher than the velocity of the stream of methane or methane and inert gas mixture.
Claim 4
Dependent Claim
12 words
A process according to claim 1 wherein the oxidising gas is oxygen.
Claim 5
Dependent Claim
12 words
A process according to claim 1 wherein the oxidising gas is air.
Claim 6
Dependent Claim
28 words
A process according to claim 4 wherein the air is preheated to a temperature in the range of from 300° to 600°C before entry into the com-bustion tube.
Claim 7
Dependent Claim
31 words
A process according to claim 1, 2 or 4 wherein pure methane is reacted and the pressure in the combustion tube is in the range of from 20 to 50 bars.
Claim 8
Dependent Claim
43 words
A process according to claim 1, 2 or 5 wherein the oxidising gas is air and the volume of the stream of methane or methane and inert gas mixture is from 3 to 15 times greater than that of the stream of air.
Claim 9
Dependent Claim
34 words
A process according to claim 3 wherein the volume of the stream of methane or methane and inert gas mixture is from 10 to 100 times greater than that of the stream of oxygen.
Claim 10
Dependent Claim
24 words
A process according to claim 1, 2 or 3 wherein unreacted methane from the separation of products of reaction is recycled to the reaction.
Claim 11
Dependent Claim
29 words
A process according to claim 1, 2 or 3 wherein the methane or mixture of methane and inert gas has a velocity of about 4m.sec-1 in the combustion tube.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.