L'air Liquide,societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude

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Martin Rothamel

Stephane Haag

Frank Castillo-Welter

Sven Pohl

Gotz Burgfels

Manfred Frauenrath

Martin Gorny

Lin Lin

Peter Trabold

A process of producing a catalyst based on pentasil-type crystalline aluminosilicate is described, including the steps of (a) treating hydrous aluminum oxide with an aqueous, acid-containing medium, (b) mixing the hydrous aluminum oxide treated with aqueous, acid-containing medium from step (a) with an H-zeolite and (c) calcining the mixture obtained in step (b). In addition, a catalyst is disclosed which is obtained by such a process, as well as its use in CMO and OTO processes.

Process of producing zeolite-based catalysts for converting oxygenates to lower olefins

A process for producing olefins from oxygenates can include the following steps: (i) heterogeneously catalyzed conversion of at least one oxygenate to a product stream containing Colefins, Colefins, Colefins, Chydrocarbon compounds, and Chydrocarbon compounds; and (ii) separation of a propylene stream consisting of Colefins for at least 95 wt-%, wherein at least 10 wt-% of the propylene stream are recirculated into process step (i).

Process and plant for producing olefins from oxygenates

The present invention relates to a plant and a process for producing propylene at least one oxygenate, comprising a reactor for converting the reactant mixture into a product mixture which comprises propylene and also aliphatic and aromatic Chydrocarbons, at least one distillation column for removing a Cstream, the Cstream comprising at least 90 wt % of the aliphatic and aromatic Chydrocarbons of the product mixture, an extractive distillation column for separating the Cstream into an aromatics stream and an aliphatics stream, the aliphatics stream comprising at least 90 wt % of the aliphatics of the Cstream, and the aromatics stream comprising at least 90 wt % of the aromatics of the Cstream, and an aliphatics recycle line for at least partial recycling of the aliphatics stream to the reactor. According to the invention, an aromatics recycle line is provided which returns the aromatics stream at least partially as extractant into the extractive distillation column.

Plant and process for producing propylene from methanol

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Frankfurt am Main, Germany

Martin Rothamel