Method for removing nitric oxide in tail gas discharged in preparation of oxalate by using CO
A nitrogen oxide and oxalate technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of carbon monoxide or formate reaction, etc., can solve problems such as incomplete treatment of alkyl nitrite and reduce losses , high recovery rate, the effect of reducing pollution
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0020] Send the exhaust tail gas containing 0.5% (volume) of nitrogen oxides and methyl nitrite (10%) into the condenser, and condense under the condition of -40 to obtain the solid effluent I of methyl nitrite, and nitrogen oxides The gas phase effluent II of the substance; the gas phase effluent II containing nitrogen oxides enters the catalytic thermal decomposition reactor and contacts with the metal oxide catalyst, and the methyl nitrite in it is obtained after the catalytic thermal decomposition of the nitrogen oxides. Gas phase effluent III ; Nitrogen oxide-containing gas phase effluent III enters the oxidative esterification reactor with oxygen and ethanol, and reacts to generate ethyl nitrite effluent III, recovers ethyl nitrite after separation, and vents the remaining tail gas. Among them, the catalyst is 0.45%Pd+0.40%K+0.22%Ce / α-Al 2 o 3 . In the catalytic thermal decomposition reactor, the reaction temperature is 250°C, the reaction pressure is -0.05MPa, and the...
Embodiment 2
[0022] Send the exhaust tail gas containing 1% (volume) of nitrogen oxides and methyl nitrite (5%) into the condenser, and condense at -30°C to obtain a solid effluent I of methyl nitrite, and nitrogen-containing The gas phase effluent II of oxides; the gas phase effluent II containing nitrogen oxides enters the catalytic thermal decomposition reactor and contacts with the metal oxide catalyst, and the methyl nitrite in it is obtained after catalytic thermal decomposition to obtain the gas phase effluent containing nitrogen oxides III: The nitrogen oxide-containing gas phase effluent III enters the oxidative esterification reactor with oxygen and propanol, and reacts to form propyl nitrite effluent III, which is recovered after separation, and the remaining tail gas is vented. Among them, the catalyst is 0.12%Pd+0.33%Mg / α-Al 2 o 3 . In the catalytic thermal decomposition reactor, the reaction temperature is 300°C, the reaction pressure is 0.05MPa, and the reaction volume spa...
Embodiment 3
[0024] Send the exhaust tail gas containing 5% (volume) of nitrogen oxides and methyl nitrite (15%) into the condenser, and condense at -40°C to obtain a solid effluent I of methyl nitrite, and nitrogen-containing The gas phase effluent II of oxides; the gas phase effluent II containing nitrogen oxides enters the catalytic thermal decomposition reactor and contacts with the metal oxide catalyst, and the methyl nitrite in it is obtained after catalytic thermal decomposition to obtain the gas phase effluent containing nitrogen oxides III: The nitrogen oxide-containing gas phase effluent III enters the oxidative esterification reactor with oxygen and propanol, and reacts to form propyl nitrite effluent III, which is recovered after separation, and the remaining tail gas is vented. Among them, the catalyst is 0.30%Pd+0.2%Bi / α-Al 2 o 3 , in the catalytic thermal decomposition reactor, the reaction temperature is 400°C, the reaction pressure is 0.5MPa, and the reaction volume space...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More