Basf Aktiengesellschaft

Basf Se Corporation

Reiner Geier

Klaus Harth

Andreas Daiss

Ralf-Thomas Rahn

Wolfgang Steiner

Markus Hölzle

Stefan Iselborn

Eckehard Danz

Thomas Grassler

Christian Kuhrs

Marcus Bechtel

Michael Wille

Benjamin Hepfer

John Sauter

Michael Hyatt Regency Xian Wille

A reactor for carrying out a three-phase reaction of a liquid phase, a gaseous phase, and a catalyst over a fixed catalyst bed is disclosed. The liquid and gaseous phases are passed through the reactor via a mixing and distribution device positioned over the fixed catalyst bed. The mixing and distribution device includes a trough distributor for the liquid phase, having trough-shaped channels, outlet tubes in the trough-shaped channels for the liquid phase, a distributor plate below the trough distributor, and vertical nozzles, having one or more openings for the gaseous phase and one or more openings, arranged below the openings for the gaseous phase. For entry of the liquid phase, the nozzles are installed so that, at a predetermined liquid feed rate, the surface of the liquid on the distributor plate is below the openings for the gaseous phase and above the openings for the liquid phase.

Reactor for performing a three-phase reaction of a fluid and a gaseous phase on a packed bed catalyst

The present invention relates to a process for the catalytic preparation of melamine by decomposition of urea over particular solid catalysts using a main reactor and an after-reactor. A catalyst having a low Lewis acidity is used in the main reactor and a catalyst having an equal or preferably higher Lewis acidity is used in the after-reactor.

Two-stage reactor for the production of melamine

Growing community of inventors

Mannheim, Germany

Reiner Geier