The present invention has as its object the provision of a method for producing 1,3-butadiene capable of efficiently purifying an absorption solvent while a high productivity is assured.

A method for producing 1,3-butadiene includes: a step (A) of obtaining a produced gas containing 1,3-butadiene; a step (B) of cooling the produced gas; a step (C) of separating the produced gas, which has been subjected to the step (B); a step (D1) of separating the absorption solvent, that has absorbed an absorption component comprising the other gases containing 1,3 -butadiene into an absorption solvent that does not substantially contain the absorption component and an absorption solvent that contains the absorption component; a step (D2) of separating the absorption solvent that contains the absorption component into an absorption solvent that contains a reaction by-product and a 1,3-butadiene liquid; and a step (E) of purifying the absorption solvent, that contains the reaction by-product.

Processes and associated reaction systems for the oxidative dehydrogenation of an alkane containing 2 to 6 carbon atoms, preferably ethane or propane, more preferably ethane, are provided. In particular, a process is provided that comprises supplying a feed gas comprising the alkane and oxygen to a reactor vessel that comprises an upstream and downstream catalyst bed; contacting the feed gas with an oxidative dehydrogenation catalyst in the upstream catalyst bed, followed by contact with an oxidative dehydrogenation/oxygen removal catalyst in the downstream catalyst bed, to yield a reactor effluent comprising the alkene; and supplying an upstream coolant to an upstream shell space of the reactor vessel from an upstream coolant circuit and a downstream coolant to a downstream shell space of the reactor vessel from a downstream coolant circuit.

A method for producing hydrocarbons and hydrogen from methane. The method includes packing a catalyst comprising platinum, bismuth and a support material into a reactor; introducing a reactant mixture containing methane into the reactor such that the reactant mixture containing methane is in close contact with the reactant mixture; and heating the reactant mixture containing methane to a temperature for a period of time.

A method for producing hydrocarbons and hydrogen from methane. The method includes packing a catalyst comprising platinum, bismuth and a support material into a reactor; introducing a reactant mixture containing methane into the reactor such that the reactant mixture containing methane is in close contact with the reactant mixture; and heating the reactant mixture containing methane to a temperature for a period of time.

Processes and associated reaction systems for the oxidative dehydrogenation of an alkane containing 2 to 6 carbon atoms, preferably ethane or propane, more preferably ethane, are provided. In particular, a process is provided that comprises supplying a feed gas comprising the alkane and oxygen to a reactor vessel that comprises an upstream and downstream catalyst bed; contacting the feed gas with an oxidative dehydrogenation catalyst in the upstream catalyst bed, followed by contact with an oxidative dehydrogenation/oxygen removal catalyst in the downstream catalyst bed, to yield a reactor effluent comprising the alkene; and supplying an upstream coolant to an upstream shell space of the reactor vessel from an upstream coolant circuit and a downstream coolant to a downstream shell space of the reactor vessel from a downstream coolant circuit.

A catalytic composite for a cyclic process of adiabatic, non-oxidative dehydrogenation of an alkane into an olefin, comprising a dehydrogenation catalyst, a semimetal and a carrier supporting the catalyst and the semimetal. During the reduction and/or regeneration stages of the adiabatic process, the semimetal releases heat which can be used to initiate the dehydrogenation reactions, which are endothermic in nature, thereby reducing the need for hot air flow and combustion of coke as heat input. The semi-metal is inert towards the dehydrogenation reaction itself, alkane feed and olefin product as well as other side reactions of the cyclic process such as cracking and decoking.

Process for the production of benzoic acid, said process comprising the steps of: (A) producing ethanol from a bio-mass, which is advantageously a carbohydrate-containing biomass, then (B) causing the ethanol produced at the step (A) to react with methanol, so as to produce benzyl alcohol and/or benzaldehyde, then (C) causing the benzyl alcohol and/or benzaldehyde produced at the step (B) to react with oxygen, so as to produce benzoic acid.