The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which have been produced using antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm.

Systems for dehydrogenating an alkane are provided. An exemplary system includes a furnace and further includes alkane heating chambers, regeneration mixture heating chambers, and two groups of reaction chambers, all located within the furnace. The alkane heating chambers and regeneration mixture heating chambers can preheat an alkane feed and a regeneration mixture feed, respectively. The two groups of reaction chambers can be switchably coupled to an alkane feed and a regeneration mixture feed such that an alkane can flow through one group of reaction chambers while a regeneration mixture flows through the other group of reaction chambers. Processes for dehydrogenating an alkane are also provided.

The invention relates to a termination device (10) of a tubular reactor (1) comprising at least one separation element (11) adapted for the separation of solid particles and gaseous effluents and at least one coupling element (12) that is part of an end of said tubular reactor, said separation element being connected to said coupling element, characterized in that each element of the termination device is made of ceramic material.

The invention also relates to a tubular reactor (1), having a vertical or substantially vertical axis, of a fluid catalytic cracking unit equipped with a termination device according to the invention and to a corresponding fluid catalytic cracking unit.

A catalyst carrier for insertion in a reactor tube of a tubular reactor, said catalyst carrier comprising: a container for holding catalyst in use, said container having a bottom surface closing the container, and a top surface; a carrier outer wall extending from the bottom surface to the top surface; a seal extending from the container by a distance which extends beyond the carrier outer wall; said carrier outer wall having apertures located below the seal.

A reactor system and method for catalytic dehydrogenation of saturated C3-C6 hydrocarbons within a reactor placed within a reactor disengager, where the reactor is open at the bottom thereof and open to the disengager, and the exit riser from the reactor is not hard coupled to at least one downstream cyclone. This configuration permits controlling the amount of catalyst within the reactor by varying the level of catalyst in the reactor disengager outside the reactor and permits controlling total catalyst hold-up and/or weight hourly space velocity (WHSV) independently from catalyst flow from the catalyst regenerator.

A reactor system and method for catalytic dehydrogenation of saturated C3-C6 hydrocarbons within a reactor placed within a reactor disengager, where the reactor is open at the bottom thereof and open to the disengager, and the exit riser from the reactor is not hard coupled to at least one downstream cyclone. This configuration permits controlling the amount of catalyst within the reactor by varying the level of catalyst in the reactor disengager outside the reactor and permits controlling total catalyst hold-up and/or weight hourly space velocity (WHSV) independently from catalyst flow from the catalyst regenerator.

Reactor installation tools and methods for installing reactor components in a reactor tube are described herein. A reactor installation tool can include a releasable attachment assembly for securing the tool to a reactor or support for holding reactor components. The tool can include a movable cylinder that can be actuated to engage and push on a reactor component in an interior region of the reactor for positioning the contents of the reactor in a desired location. The tool can further include means for supply blasts of compressed gas to an interior region of the reactor to aid in the expansion and positioning of the reactor contents. A skirt seal can be used to ensure that the blasts of compressed gas are contained in the interior region of the reactor.

Disclosed is an integrated process and system to generate power and convert acyclic C5 feedstock to non-aromatic, cyclic C5 hydrocarbon. A combustion device, such as a turbine, and reactor tubes containing catalyst compound are disclosed. A process involving contacting acyclic C5 feedstock with catalyst composition and obtaining cyclic C5 hydrocarbon is also disclosed.

Disclosed is a process and system to convert acyclic C.sub.5 feedstock to non-aromatic, cyclic C.sub.5 hydrocarbon. A furnace and reactor tubes comprising a catalyst compound are disclosed. A process involving contacting acyclic C.sub.5 feedstock with catalyst composition and obtaining cyclic C.sub.5 hydrocarbon is also disclosed.

A one-to-many parallelized millireactor system capable of high throughput production in millireactors. Also disclosed is a method for carrying out multi-phase reactions.