2results about "Nitrous acid preparation ester preparation" patented technology

The application relates to the technical field of nitrite synthesis, and discloses a synthesis method and a synthesis device of alkyl nitrite. The synthesis method comprises the following steps: firstly, mixing gaseous nitric oxide and gaseous oxygen to obtain a mixture through a first reaction; and then, mixing the mixture with alkyl alcohol to obtain alkyl nitrite through a second reaction. The synthesis method greatly shortens the reaction time, increases the yield of alkyl nitrite, does not have a complicated post-treatment process and a large amount of by-product nitric acid, and is beneficial to cost saving and time saving.

This utility model belongs to the technical field of syngas-to-ethylene glycol process technology, specifically relating to an apparatus for preparing methyl nitrite based on fuming nitric acid, including a booster compressor and a NO... x The generator / absorption tower and nitric acid reduction reaction tower, booster compressor and NO x The bottom gas inlet of the generator / absorber is connected to NO. x The generator / absorber is connected to the nitric acid feed pipe and the demineralized water feed pipe. The top liquid inlet of the nitric acid reduction reaction tower is connected to the bottom liquid pipeline of the esterification tower and the NO... x The bottom liquid phase outlet of the generator / absorption tower is connected, and the bottom gas phase inlet of the nitric acid reduction reaction tower is connected to the NO. x The top gaseous outlet of the generator / absorber is connected. This invention uses fuming nitric acid as raw material to react and obtain NO and nitric acid, which are then reacted with the methyl ester-containing bottom liquid of the esterification tower to generate methyl nitrite, which is then supplied to the esterification tower. This achieves the replenishment of methyl nitrite, simplifies the nitrogen replenishment operation of the syngas to ethylene glycol production system, reduces operational risks, and lowers costs.