Study On The New Technology For Synthesis Of Ethyl Nitrite In The Trickle Bed Reactor

The trickle bed reactor was used to investigate ethyl nitrite(EN) regenerationreaction. Based on the former results and the regeneration mechanosm, moleuclarseives were selected as the catalysts to improve the reactivity and selectivity throughshape-selective catalysis. By testing the catalytic decomposition of EN andcalculating the dynamic diameter, several molecular seives were selected as thecatalysts. Besides molecular seives, the porcelain rings were also used as package inthe tricle bed reactor. With the gases and liquid cocurrent flow in the trickle bedreactor, the impact of operating parameters such as the reaction temperature, theconcentration of N₂, the mixing pattern of the reacting gases, the mole ratio of NO toO₂ and the mole ratio of the C₂H₅OH to NO on the EN regeneration reaction wereinvestigated. The optimum reaction conditions were proved to be as following:Reaction temperature: 60℃Mixing pattern of reacting gas: mixing in the entrance of the reactorPacking medium: 5A, porcelain ring(bowl)The mole ratio of NO to O2: 6:1The content of N₂: 50%The mole ratio of C₂H₅OH to NO: 3:1Methyl nitrite regeneration reaction was studied also. It was found that at thesame reaction condition, the yield of methyl nitrite was less than that of EN. Theyield of EN is higher in cocurrent flow mode than that in countercurrent flow mode.DFT method was used to do the dynamic diameter calculation and thedecomposition of the methyl nitrite. The results showed that the chemical bond ofMO-NO is easier to be broken, which explains why MN is helpful for CO couplingreaction.