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1. WO2011002828 - USE OF MIXED ACTIVITY DEHYDROGENATION CATALYST FOLLOWING OXIDATIVE REHEAT

Publication Number WO/2011/002828
Publication Date 06.01.2011
International Application No. PCT/US2010/040512
International Filing Date 30.06.2010
IPC
C07C 5/333 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
5Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
32by dehydrogenation with formation of free hydrogen
327Formation of non-aromatic carbon-to-carbon double bonds only
333Catalytic processes
C07C 15/46 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
15Cyclic hydrocarbons containing only six-membered aromatic rings as cyclic part
40substituted by unsaturated hydrocarbon radicals
42monocyclic
44the hydrocarbon substituent containing a carbon-to-carbon double bond
46Styrene; Ring-alkylated styrenes
B01J 8/04 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
8Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
02with stationary particles, e.g. in fixed beds
04the fluid passing successively through two or more beds
CPC
B01J 35/0006
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
35Catalysts, in general, characterised by their form or physical properties
0006Catalysts containing parts with different compositions
C07C 5/333
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
5Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
32by dehydrogenation with formation of free hydrogen
327Formation of non-aromatic carbon-to-carbon double bonds only
333Catalytic processes
Applicants
  • UOP LLC [US]/[US] (AllExceptUS)
  • SUD-CHEMIE, INCORPORATED [US]/[US] (AllExceptUS)
  • SCHULTZ, Michael, A. [US]/[MY] (UsOnly)
  • KAUFF, Daniel, A. [US]/[US] (UsOnly)
  • MANKIN, Kyle, D. [US]/[US] (UsOnly)
Inventors
  • SCHULTZ, Michael, A.
  • KAUFF, Daniel, A.
  • MANKIN, Kyle, D.
Common Representative
  • UOP LLC
Priority Data
61/222,57702.07.2009US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) USE OF MIXED ACTIVITY DEHYDROGENATION CATALYST FOLLOWING OXIDATIVE REHEAT
(FR) UTILISATION D'UN CATALYSEUR DE DÉSHYDROGÉNATION À ACTIVITÉ MIXTE APRÈS RÉCHAUFFAGE OXYDANT
Abstract
(EN)
Methods are disclosed for the dehydrogenation of feed streams, such as in the manufacture of styrene from ethylbenzene, using a catalyst bed having catalyst with differing activities. In particular, the use of upstream and downstream catalyst beds of relatively low and high activities, respectively, can reduce the production of unwanted byproducts, especially in styrene production processes employing an oxidative reheat step (oxidation zone) prior to ethylbenzene dehydrogenation. The methods allow the maximum temperature in the oxidation zone to be decreased, thereby reducing the formation of unwanted oxygenated byproducts (e.g., phenol).
(FR)
L'invention porte sur des procédés pour la déshydrogénation de courants d'alimentation, par exemple dans la fabrication de styrène à partir d'éthylbenzène, utilisant un lit de catalyseur comprenant du catalyseur ayant des activités différentes. En particulier, l'utilisation de lits de catalyseur amont et aval ayant des activités relatives faible et élevée, respectivement, permet de réduire la production de sous-produits non voulus, en particulier dans des procédés de production de styrène employant une étape de réchauffage oxydant (zone d'oxydation) avant la déshydrogénation de l'éthylbenzène. Les procédés permettent d'abaisser la température maximale dans la zone d'oxydation, ce qui réduit de cette manière la formation de sous-produits oxygénés non voulus (par exemple de phénol).
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