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2002•中国化学快报：英文版Requires access

Vapor—phase Nitration of Benzene to Nitrobenzene over Supported Sulfuric Acid Catalyst

JingLinCHEN, WeiGuoCHENG

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Abstract

Vapor-phase nitration of benzene over solid acid catalyst is expected to be a clean process with no sulfuric acid waste.We investigated this process over solid acidic catalysts utilizing diluted nitric acid (60-70%) as nitrating agent,and found that supported sulfuric acid catalyst exhibited a very high catalytic activity.Under the conditions of reaction temperature 160-170℃,space velocity (SV) 1200 h-1,the yield and the space-time yield (STY) of nitrobenzene (NB) based on HNO3 were more than 98% and 0.75 kg@kgcat-1@h-1 over 10% H2SO4/SiO2 (by weight) catalyst respectively.

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What this paper is about

Vapor-phase nitration of benzene over solid acid catalyst is expected to be a clean process with no sulfuric acid waste.We investigated this process over solid acidic catalysts utilizing diluted nitric acid (60-70%) as nitrating agent,and found that supported sulfuric acid catalyst exhibited a very high catalytic activity.Under the conditions of reaction temperature 160-170℃,space velocity (SV) 1200 h-1,the yield and the space-time yield (STY) of nitrobenzene (NB) based on HNO3 were more than 98% and 0.75 kg@kgcat-1@h-1 over 10% H2SO4/SiO2 (by weight) catalyst respectively.

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Available abstract

Vapor-phase nitration of benzene over solid acid catalyst is expected to be a clean process with no sulfuric acid waste.We investigated this process over solid acidic catalysts utilizing diluted nitric acid (60-70%) as nitrating agent,and found that supported sulfuric acid catalyst exhibited a very high catalytic activity.Under the conditions of reaction temperature 160-170℃,space velocity (SV) 1200 h-1,the yield and the space-time yield (STY) of nitrobenzene (NB) based on HNO3 were more than 98% and 0.75 kg@kgcat-1@h-1 over 10% H2SO4/SiO2 (by weight) catalyst respectively.

Key concepts: Nitration, Nitrobenzene, Sulfuric acid, Catalysis, Nitric acid, Benzene, Yield (engineering), Chemistry

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