Disclosed are a fluidized bed gas distributor and a fluidized bed reactor, the fluidized bed reactor comprising a first distributor (1) and a second distributor (2), wherein the first distributor (1) is located at the bottom of a fluidized bed, and second distributor (2) is located downstream of a gas from the first distributor (1). Also disclosed is a method for producing a para-xylene and co-producing light olefins, the method comprising the following steps: material stream A enters a reaction zone (3) of a fluidized bed reactor from a first gas distributor (1); material stream B enters the reaction zone (3) of the fluidized bed reactor from a second gas distributor (2); and the reactants are brought into contact with a catalyst in the reaction zone (3) to generate a gas phase stream comprising para-xylene and light olefins.

A fluid catalytic cracking unit (FCCU) for production of petrochemical feedstock fractions comprises a first reactor to receive a stream of desalinated crude oil and produce a first cracked product stream; a second reactor to receive a stream of light cracked naphtha (LCN) and produce a second cracked product stream; a third reactor to receive a bottom stream and produce a third cracked product stream; and a fractionating column and gas concentration section to separate components of the first cracked product stream, the second cracked product stream, and the third cracked product stream to produce, upon further fractionation, Ethylene, Propylene, Butylene, Benzene, Toluene and Xylene as the petrochemical feedstock fractions.

A reactor system comprising a first reactor assembly, a first pressure transition assembly, a second reactor assembly and a second pressure transition assembly.

A catalyst composition for the polymerization of propylene is provided. The catalyst composition includes one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and one or more esters of aromatic dicarboxylic acid internal electron donors, one or more aluminum containing cocatalysts and a selectivity control agent (SCA). The SCA is a mixture of an activity limiting agent and a silane composition. The catalyst composition has a molar ratio of aluminum to total SCA from 0.5:1 to 4:1. This aluminum/SCA ratio improves polymerization productivity and the polymer production rate. The catalyst composition is self-extinguishing.

The lifetime of a fluidized bed reactor containing silicon particles, for the production of chlorosilanes is greatly extended by armoring at least a portion of the reactor shell interior wall with expanded metal coated with a cement containing ceramic particles.

Systems and methods are provided for catalyst regeneration using a stoichiometric amount or less air for coke combustion.

Provided is a method for producing aromatic hydrocarbons from light alkanes. A light alkane feed is contacted with catalyst particles in each of reactors, wherein each of the reactors is a fluidized bed reactor and arranged in parallel with each other in a furnace. At least a portion of the alkane feed is converted to aromatic hydrocarbons using the catalyst particles, wherein the aromatic hydrocarbons form a part of a reactor effluent stream. The reactor effluent streams from each of the reactors are merged to form a first merged effluent stream. The first merged effluent stream is separated into the aromatic hydrocarbons, light hydrocarbons, and a fuel gas.

A process and an apparatus for producing olefins from light alkanes. A light alkane feed is contacted with catalyst particles in each of reactors, wherein each of the reactors is a fluidized bed reactor. At least a portion of the alkane feed is converted to olefins using the catalyst particles, wherein the olefins form a part of a reactor effluent stream. The reactor effluent streams from each of the reactors are merged to form a merged effluent stream. The merged effluent stream is separated into an olefin stream and the other streams. The other streams may comprise a recycle stream and light gases.

A method and device for preparing propylene and C4 hydrocarbons from oxygen-containing compounds. By circulating 80 wt. % or more of the hydrocarbons with five or more carbons in the product into a catalytic cracking lift pipe to perform a cracking reaction to generate a product containing propylene and C4 hydrocarbons, the method improves the reaction rate of ethylene alkylation, and the unit volume production capacity of reactor is high.

The invention relates to processes for preparing alkanolamines and ethyleneamines in the liquid phase, by reacting ethylene glycol and/or monoethanolamine with ammonia in the presence of an amination catalyst comprising one or more active metals selected from Sn and the elements of groups 8, 9, 10 and 11 of the Periodic Table of the Elements, wherein the amination catalyst is obtained by reductive calcination of a catalyst precursor. The catalyst precursor here is preferably prepared by contacting a conventional or catalytic support material with one or more soluble compounds of the active metals and optionally one or more soluble compounds of added catalyst elements. The present invention further relates to a process for preparing an amination catalyst comprising one or more active metals selected from Sn and the elements of groups 8, 9, 10 and 11 of the Periodic Table of the Elements, the amination catalyst being obtained by reductive calcination of a catalyst precursor, wherein the reactor in which the catalyst precursor is reductively calcined is connected to a denox plant, and to the use of a denox plant in the preparation of amination catalysts.