摘要:
Embodiments of apparatuses and methods for reforming of hydrocarbons including recovery of products are provided. In one example, a method comprises separating a reforming-zone effluent into a net gas phase stream and a liquid phase hydrocarbon stream. The net gas phase stream is separated for forming an H 2 -rich stream and a first liquid phase hydrocarbon stream. The H 2 -rich stream may be contacted with an adsorbent to form an H 2 -ultra rich stream and a gas stream. C 3 /C 4 hydrocarbons are absorbed from the gas stream with the liquid phase hydrocarbon stream. The gas stream may be contacted with an H 2 /hydrocarbon separation membrane to separate the PSA tail gas stream and form an H 2 - rich permeate stream and an H 2 depleted non-permeate residue stream.
摘要:
An integrated process for maximizing recovery of LPG is provided. The process comprises providing a hydrocarbonaceous feed comprising naphtha, and a hydrogen stream to a reforming zone. The hydrocarbonaceous feed is reformed in the reforming zone in the presence of the hydrogen stream and a reforming catalyst to provide a reformate effluent stream. At least a portion of the reformate effluent stream and at least one stream comprising C6- hydrocarbons from one or more of a hydrocracking zone, an isomerization zone, and a transalkylation zone is passed to a debutanizer column of the reforming zone to provide a fraction comprising liquid petroleum gas (LPG) and a debutanizer column bottoms stream.
摘要:
A novel zeolite catalyst composition comprising a mixture of a zeolite, a binder, and a zinc borate compound wherein such mixture is calcined or treated with steam. Preferably, the zeolite has not been treated with an acid. Also provided is a process of making such composition, a product by such process, and the use thereof in the conversion of a hydrocarbon-containing fluid such as a gasoline-boiling range fluid or coker naphtha. Use of such zeolite in the conversion of a hydrocarbon-containing fluid also includes pre-treating such hydrocarbon-containing fluid with a nitrogen removal medium such as ion-exchange resin.
摘要:
Improved catalytic reforming processes and systems employ reforming reactors in a more efficient manner and can avoid problems associated with yield loss. Aromatics and isoparaffins are separated prior to passing to a reforming unit. An integrated process for producing gasoline blending components includes: separating a naphtha feedstream into an aromatic-rich stream and an aromatic-lean stream; separating the aromatic-lean stream into an isoparaffin-rich stream and an isoparaffin-lean stream; and catalytically reforming the isoparaffin-lean stream to produce a reformate stream.
摘要:
A process for the treatment of a light naphtha feedstock that comprises normal paraffins and iso-paraffins may include separating the feedstock into a first iso-paraffin stream and a normal paraffin stream. The separating may be performed with 5A molecular sieves, a pressure of about 1-3 bars, and a temperature of 100-260°C. A product stream may be provided by subjecting the normal paraffin stream to at least one of steam cracking, isomerizing, and aromatizing.
摘要:
A process for the removal of hydrocarbon contaminants, such as dienes and olefins, from an aromatics reformate by contacting an aromatics reformate stream with a hydrotreating catalyst and/or a molecular sieve. The hydrotreating catalyst substantially converts all dienes to oligomers and partially converts olefins to alkylaromatics. The molecular sieve converts the olefins to alkylaromatics. The process provides an olefin depleted product which can be passed through a clay treater to substantially convert the remaining olefins to alkylaromatics. The hydrotreating catalyst has a metal component of nickel, cobalt, chromium, vanadium, molybdenum, tungsten, nickel-molybdenum, cobalt-nickel-molybdenum, nickel-tungsten, cobalt-molybdenum or nickel-tungsten-titanium, with a nickel molybdenum/alumina catalyst being preferred. The molecular sieve is an intermediate pore size zeolite, preferably MCM-22. The clay treatment can be carried out with any clay suitable for treating hydrocarbons.
摘要:
In accordance with one or more embodiments of the present disclosure, a process for treating a hydrocarbon feedstream having nitrogen-containing compounds and polynuclear aromatic compounds includes contacting the hydrocarbon feedstream with an adsorbent material; introducing the adsorbent-treated hydrocarbon feedstream to a hydrocracking reaction unit to produce a hydrocracked effluent stream; introducing a naphtha stream to a catalytic reforming unit to produce a reformate stream; introducing the reformate stream to an aromatic recovery complex to produce a light reformate stream, a BTX stream, and an aromatic bottoms stream; and introducing the aromatic bottoms stream to the used adsorbent to release at least a portion of the nitrogen-containing compounds and polynuclear compounds.
摘要:
La présente invention concerne une procédé de traitement d'une essence comprenant des dioléfines, des oléfines et des composés soufrés incluant des mercaptans. Le procédé comprend les étapes suivantes : a) on effectue une étape de démercaptisation par addition d'au moins une partie des mercaptans sur les oléfines par mise en contact de l'essence avec au moins un premier catalyseur; b) on effectue une séparation de l'essence issue de l'étape a) en une coupe d'essence légère intermédiaire et une coupe d'essence lourde intermédiaire c) on introduit un flux d'hydrogène et au moins la seconde coupe d'essence lourde intermédiaire issue de l'étape b) dans une colonne de distillation catalytique comprenant au moins une zone réactionnelle incluant au moins un second catalyseur sous forme sulfure comprenant un second support, au moins un métal du groupe VIII et un métal du groupe VIb, afin de réaliser la décomposition des composés soufrés en H 2 S, d) on évacue de la colonne de distillation catalytique au moins une fraction d'essence légère finale comprenant de l'H 2 S et une fraction d'essence lourde désulfurée, la fraction d'essence légère finale étant évacué en un point situé au dessus de la zone réactionnelle et la fraction d'essence lourde désulfurée étant évacuée en un point situé en dessous de la zone réactionnelle.
摘要:
An adsorptive separation process for preparing the separate feed streams charged to naphtha reforming unit and a steam cracking unit is presented. The feed stream to the overall unit is fractionated to yield a C5 stream and a second stream containing the rest of the feed, which is passed into the adsorptive separation unit. The C5 stream is utilized as the desorbent in the adsorptive separation. The adsorptive separation separates the C6-plus components of the feed stream into a normal paraffin stream, which is charged to the steam cracking process, and non-normal hydrocarbons which are passed into a reforming zone. The invention improves the yields from both downstream units.
摘要:
The disclosure provides a process to hydrodearylate the non-condensed alkyl-bridged multi-aromatics at the outlet of the clay tower where such multi-aromatics form rather than performing hydrodearylation on the reject stream of the aromatics complex. Hydrodearylation may feature combining a C8+ hydrocarbon stream from a clay treater with a hydrogen stream over a catalyst bed comprising a support and an acidic component optionally containing Group 8 and/or Group 6 metals.