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1. WO2010030369 - CATALYTIC CRACKING FOR ENHANCED PROPYLENE YIELD AND REDUCED BENZENE NAPHTHA FRACTIONS

Publication Number WO/2010/030369
Publication Date 18.03.2010
International Application No. PCT/US2009/005095
International Filing Date 11.09.2009
IPC
B01J 29/00 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
29Catalysts comprising molecular sieves
C10G 11/00 2006.1
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
GCRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
11Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
CPC
B01D 61/00
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
61Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis, ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
B01D 61/362
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
61Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis, ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
36Pervaporation; Membrane distillation; Liquid permeation
362Pervaporation
B01D 71/54
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
71Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
06Organic material
54Polyureas; Polyurethanes
B01D 71/64
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
71Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
06Organic material
58Other polymers having nitrogen in the main chain, with or without oxygen or carbon only
62Polycondensates having nitrogen-containing heterocyclic rings in the main chain
64Polyimides; Polyamide-imides; Polyester-imides; Polyamide acids or similar polyimide precursors
B01D 71/70
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
71Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
06Organic material
70Polymers having silicon in the main chain, with or without sulfur, nitrogen, oxygen or carbon only
B01J 29/40
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
29Catalysts comprising molecular sieves
04having base-exchange properties, e.g. crystalline zeolites
06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
40of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
Applicants
  • W.R. GRACE & CO. - CONN. [US]/[US] (AllExceptUS)
  • WHITE, Lloyd, Steven [US]/[US] (UsOnly)
  • WORMSBECHER, Richard, Franklin [US]/[US] (UsOnly)
  • CHENG, Wu-cheng [US]/[US] (UsOnly)
Inventors
  • WHITE, Lloyd, Steven
  • WORMSBECHER, Richard, Franklin
  • CHENG, Wu-cheng
Agents
  • CROSS, Charles, A.
Priority Data
61/192,07415.09.2008US
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) CATALYTIC CRACKING FOR ENHANCED PROPYLENE YIELD AND REDUCED BENZENE NAPHTHA FRACTIONS
(FR) CRAQUAGE CATALYTIQUE POUR AMÉLIORER LE RENDEMENT DU PROPYLÈNE ET RÉDUIRE LES FRACTIONS DE NAPHTA BENZÉNIQUE
Abstract
(EN) A process in which a catalytic cracking unit is operated to crack a hydrocarbon feedstock in a manner to enhance light olefin yields. The accompanying benzene-containing naphtha product stream is further processed through a benzene selective membrane to provide a low content benzene stream Refiners frequently operate their cracking units to optimize light olefin yields, e g, propylene, in response to needs in the petrochemical industry, and it has been discovered that units operated in this manner frequently produce naphtha containing increased amounts of benzene. The method of this invention therefore allows one to operate the unit when it is desired to optimize light olefin yields, yet at the same time produce a naphtha yield having a low benzene content. The invention is particularly useful when the cracking unit utilizes pentasil zeolites at increased concentrations to enhance light olefins yield.
(FR) Le procédé ci-décrit permet à une unité de craquage catalytique d'être exploitée pour craquer une charge d'hydrocarbures de manière à améliorer les rendements d'oléfines légères. Le flux de naphta benzénique en produit l'accompagnant est, en outre, traité par passage sur une membrane sélective vis-à-vis du benzène pour obtenir un flux à basse teneur de benzène. Les raffineurs exploitent souvent leurs unités de craquage de manière à optimiser les rendements d'oléfines légères, par exemple, propylène, en réponse aux besoins de l'industrie pétrochimique, et on a découvert que les unités exploitées de cette manière produisent souvent un naphta contenant des quantités croissantes de benzène. Le procédé selon la présente invention permet, par conséquent, d'exploiter l'unité, comme souhaité, pour optimiser les rendements d'oléfines légères, tout en obtenant en même temps un rendement de naphta à basse teneur de benzène. L'invention est particulièrement utile quand l'unité de craquage utilise des zéolites de pentasil à des concentrations supérieures pour améliorer le rendement d'oléfines légères.
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