A reactor may have a catalyst bed for the catalytic treatment of a gas stream, with the catalyst bed extending substantially over a cross section of the reactor. Gas to be treated may axially fly through the catalyst bed. A carrier structure for the catalyst bed that is at least partly floatingly mounted in the reactor may include a sieve element and, radially outwardly, carrier elements fixedly joined to the reactor wall below the sieve element. The sieve element provides a resting surface for the catalyst bed. The sieve element terminates, radially outwardly, at a distance from the reactor wall. The carrier structure also includes support elements for the sieve element that are floatingly mounted in the reactor. An improved floating mounting is thus provided where not only the sieve element itself but also further parts of the carrier structure are mounted to prevent stresses due to thermal expansion.

A fixed bed reactor system for the oxidative dehydrogenation of ethane, comprising a catalyst bed wherein the catalyst capacity profile increases along the length of catalyst bed from the upstream end to the downstream end. The catalyst bed may include one or more sections, across one or more fixed bed reactors, that are identified by a change in catalyst capacity. Catalyst capacity, or the ability to convert ethane into ethylene, may be altered by changing the dilution ratio, void fraction, and or the 35% conversion temperature. A method for loading a fixed bed reactor with an increasing catalyst capacity is also described.

The present specification relates to a method comprising: (A) mixing a ferrite-based catalyst molded article with diluent material particles; and (B) adding the mixture to a catalyst reactor, and a method for preparing butadiene using the same.

Provided are a method of producing high-purity molybdenum hexafluoride in good yield and a reaction apparatus therefor.

The method of producing molybdenum hexafluoride, in a production apparatus for molybdenum hexafluoride including a fixed bed that is for mounting metallic molybdenum and that extends inside a reactor from an upstream side to a downstream side of the reactor, a fluorine (F.sub.2) gas inlet provided on the upstream side of the reactor, and a reaction product gas outlet provided on the downstream side of the reactor, comprises bringing metallic molybdenum into contact with fluorine (F.sub.2) gas, where the fixed bed for mounting metallic molybdenum is tilted.

The invention relates to a propylene copolymer composition comprising a propylene-ethylene copolymer, wherein the propylene-ethylene copolymer has a melt flow index in the range of 0.05 to 2.5 dg/min measured according to ISO1133 (2.16 kg/230 C.), wherein the propylene-ethylene copolymer is a unimodal propylene-ethylene copolymer and wherein a pipe prepared from the propylene copolymer composition according to ISO 1167-2 has a run time without failure of at least 2,500 h measured according to ISO1167-1 at a temperature of 95 C. and a hoop stress calculated according to ISO3213 of 4.2 MPa.

The present invention concerns reactors with a radial flow of process stream to be treated comprising improved internals which can be used to minimize the catalytic zones which do not receive any of the process stream which is to be treated. The invention also concerns the use of these radial flow reactors in refining or petrochemical processes.

The invention relates to synthesis of methyl carbamate (MC) and dimethyl carbonate (DMC) in presence of stripping inert gas or superheated methanol vapors using packed column reactor and bubble column reactor.

The invention relates to a catalytic reactor suited for exothermal reactions with a radial process fluid flow and process fluid flow guides which ensures an extended fluid flow path and higher flow velocity and thereby enhanced cooling of the catalyst bed in the reactor.

The present invention provides a method of producing high-purity molybdenum hexafluoride in good yield and a reaction apparatus therefor. The method of producing molybdenum hexafluoride in a production apparatus for molybdenum hexafluoride, which production apparatus includes a fixed bed that is for mounting metallic molybdenum and that extends inside a reactor from an upstream side to a downstream side of the reactor, a fluorine (F.sub.2) gas inlet provided on the upstream side of the reactor, and a reaction product gas outlet provided on the downstream side of the reactor, comprises bringing metallic molybdenum into contact with fluorine (F.sub.2) gas, where the fixed bed for mounting metallic molybdenum is tilted.

A method of manufacturing synthesis gas by catalytic partial oxidation can prevent formation of hot spots from taking place when driving mixture gas to pass through a catalyst-filled layer at high velocity. The method comprises converting mixture gas of source gas containing lower hydrocarbons and oxidative gas containing oxygen into synthesis gas containing hydrogen and carbon monoxide as main components thereof by causing mixture gas to flow through a fixed bed catalyst layer arranged in a reactor. The method of manufacturing synthesis gas by catalytic partial oxidation is conducted such that the mixture gas is made to flow to the catalyst layer under the condition that the Reynolds number does not exceed 20 at the inlet of the catalyst layer.