Homogeneous catalytic oxidation typesCatalytic autoxidationCoordination catalytic oxidationLiquidphaseepoxidation ofalkenes
⚫ Catalytic autoxidation ⚫ Coordination catalytic oxidation ⚫ Liquid phase epoxidation of alkenes Homogeneous catalytic oxidation types
一，Catalyticautoxidationl.Catalytic autoxidation reactionsThe oxidation reactions with the characteristics of free-radical chain reaction and auto-acceleration are calledautoxidationreactions.The chain initiation is accelerated by catalysts, this types ofreactions are called catalytic autoxidationreactionOrganic acids and peroxide are produced by the catalyticautoxidationreactionsintheindustry
一、Catalytic autoxidation 1. Catalytic autoxidation reactions ⚫ The oxidation reactions with the characteristics of freeradical chain reaction and auto-acceleration are called autoxidation reactions. The chain initiation is accelerated by catalysts, this types of reactions are called catalytic autoxidation reaction. ⚫ Organic acids and peroxide are produced by the catalytic autoxidation reactions in the industry
CatalystsofcatalyticautoxidationSalts of Co or Mn transition metal ions are dissolvedin liquid state medium to form homogeneous phase.Promoters are called also oxidation promoters.One types of them is bromide, and the other typesofthem is organic compounds containing oxygen
⚫ Salts of Co or Mn transition metal ions are dissolved in liquid state medium to form homogeneous phase. ⚫ Promoters are called also oxidation promoters. One types of them is bromide, and the other types of them is organic compounds containing oxygen. Catalysts of catalytic autoxidation
Promoters of catalytic autoxidation溴化钠Sodiumbromide溴化铵AmmoniumbromideBromide四溴乙烷Tetrabromoethane四溴化碳CarbontetrabromideOrganic compounds甲乙酮Methylethylketonecontaining oxygen乙醛Aldehyde三聚乙醛Paraldehyde
Organic compounds containing oxygen Promoters of catalytic autoxidation 溴化钠 Sodium bromide 溴化铵Ammonium bromide 四溴乙烷Tetrabromoethane 四溴化碳 Carbon tetrabromide 甲乙酮 Methyl ethyl ketone 乙醛 Aldehyde 三聚乙醛 Paraldehyde Bromide
Initiator of autoxidation reactionsWhen the products are hydrocarbon peroxides, thecatalysts are not used, and the reactions areinitiated by a little initiator.异丁烷过氧化氢Isobutanehydrogenperoxide偶氮二异丁睛Azobisisobutyronitrile(AIBN
When the products are hydrocarbon peroxides, the catalysts are not used, and the reactions are initiated by a little initiator. 异丁烷过氧化氢 Isobutane hydrogen peroxide 偶氮二异丁腈Azobisisobutyronitrile （AIBN） Initiator of autoxidation reactions