Abstract: A method for producing butadiene comprises a step of supplying a raw material gas containing 2-butene and an oxygen-containing gas containing molecular oxygen to a reactor filled with a catalyst to obtain a produced gas containing butadiene, wherein the catalyst contains a composite oxide containing molybdenum and bismuth, and a proportion of cis-2-butene in 2-butene in the raw material gas is 30 to 90 mol %.

Abstract: A method for producing linear monoolefins comprises a step of contacting a raw material composition containing a first linear monoolefin having 4 to 8 carbon atoms with an isomerization catalyst at 250 to 390° C. in the presence of 20 ppm by volume or more of molecular oxygen and/or 20 ppm by volume or more of water to perform an isomerization reaction for isomerizing at least a part of the first linear monoolefin to a second linear monoolefin having a different double bond position, wherein the catalyst contains zeolite.

Abstract: A process of producing 1,3-butadiene includes: a first step of obtaining gases containing 1,3-butadiene by an oxidative dehydrogenation reaction of a raw material gas with a molecular oxygen-containing gas in the presence of a metal oxide catalyst, the raw material gas containing 1-butene and 2-butene and having a proportion of 2-butene to a sum of 1-butene and 2-butene, which is defined as 100% by volume, being not less than 50% by volume; a second step of cooling the produced gases obtained in the first step; and a third step of separating the produced gases having undergone the second step into molecular oxygen and inert gases and other gases containing 1,3-butadiene by selective absorption to an absorbing solvent, wherein the concentration of methyl vinyl ketone in the produced gases having been cooled in the second step is 0% by volume or more and not more than 0.03% by volume.

Abstract: A process of producing 1,3-butadiene includes: a first step of obtaining gases containing 1,3-butadiene by an oxidative dehydrogenation reaction of a raw material gas with a molecular oxygen-containing gas in the presence of a metal oxide catalyst, the raw material gas containing 1-butene and 2-butene and having a proportion of 2-butene to a sum of 1-butene and 2-butene, which is defined as 100% by volume, being not less than 50% by volume; a second step of cooling the produced gases obtained in the first step; and a third step of separating the produced gases having undergone the second step into molecular oxygen and inert gases and other gases containing 1,3-butadiene by selective absorption to an absorbing solvent, wherein the concentration of methyl vinyl ketone in the produced gases having been cooled in the second step is 0% by volume or more and not more than 0.03% by volume.

Abstract: A method for producing butadiene comprises a step of obtaining a product gas containing butadiene, by feeding a raw-material gas containing straight-chain butene and an oxygen-containing gas containing molecular oxygen to a reactor and performing oxidative dehydrogenation reaction in the presence of a catalyst, wherein the catalyst comprises a composite oxide containing molybdenum and bismuth, and the concentration of hydrocarbons having 5 or more carbon atoms in the raw-material gas is 0.05 mol % to 7.0 mol %.

Abstract: A method for producing diene comprises a step 1 of obtaining a straight chain internal olefin by removing a branched olefin from a raw material including at least the branched olefin and a straight chain olefin; and a step 2 of producing diene from the internal olefin by oxidative dehydrogenation using a first catalyst and a second catalyst, and the first catalyst has a complex oxide including bismuth, molybdenum and oxygen, and the second catalyst includes at least one selected from the group consisting of silica and alumina.

Abstract: An isomerization catalyst for isomerizing a first straight-chain olefin to a second straight-chain olefin different therefrom in a double bond position in the presence of 20 ppm by volume or more of molecular oxygen and/or water, comprising: Si; and Al.

Abstract: An isomerization catalyst for isomerizing a first straight-chain olefin to a second straight-chain olefin different therefrom in a double bond position in the presence of 20 ppm by volume or more of molecular oxygen more and/or water, comprising: Si; Al; and at least one metallic element selected from the Group 1 elements and the Group 2 elements, wherein the molar ratio of Si to Al (Si/Al) is 100 or less.

Abstract: A method for producing butadiene comprises a step of obtaining a product gas containing butadiene, by feeding a raw-material gas containing straight-chain butene and an oxygen-containing gas containing molecular oxygen to a reactor and performing oxidative dehydrogenation reaction in the presence of a catalyst, wherein the catalyst comprises a composite oxide containing molybdenum and bismuth, and the concentration of hydrocarbons having 5 or more carbon atoms in the raw-material gas is 0.05 mol % to 7.0 mol %.

Abstract: An isomerization catalyst for isomerizing a first straight-chain olefin to a second straight-chain olefin different therefrom in a double bond position in the presence of 20 ppm by volume or more of molecular oxygen and/or water, comprising: Si; and Al.

Abstract: A method for producing diene in which diene can be produced in a high yield by using a raw material including a branched olefin and a straight chain olefin is provided. The method for producing diene comprises: a step 1 of obtaining an internal olefin by removing a branched olefin from a raw material including at least the branched olefin and a straight chain olefin; a step 2 of isomerizing the internal olefin to a terminal olefin by using an isomerization catalyst; and a step 3 of producing diene from the terminal olefin obtained in the step 2 by oxidative dehydrogenation using a dehydrogenation catalyst.

Abstract: A method for producing diene comprises a step 1 of obtaining a straight chain internal olefin by removing a branched olefin from a raw material including at least the branched olefin and a straight chain olefin; and a step 2 of producing diene from the internal olefin by oxidative dehydrogenation using a first catalyst and a second catalyst, and the first catalyst has a complex oxide including bismuth, molybdenum and oxygen, and the second catalyst includes at least one selected from the group consisting of silica and alumina.