Isomerization of meta-xylene over offretite catalysts

Journal Article · Sat Dec 01 04:00:00 EST 1990 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(90)90012-9· OSTI ID:5750414

Sastre, E; Corma, A; Perez-Pariente, J ^[1]; Fajula, F; Figueras, F ^[2]

---

1. Institiuo de Catalisis y Petroleoquimica, Madrid (Spain)
2. Laboratoire de Chimie Organique Physique et Cinetique Chimique Appliquees, Montpellier (France)

The conversion of meta-xylene has been investigated over offretites with different levels of ion exchange. The ratio isomerization/disproportionation increases with the degree of exchange, most probably due to an increased accessibility of the reactant to the internal surface and to a higher number and strength of acid sites. The addition of a hydrogenation function, in H{sub 2} atmosphere, slightly increases the activity and decreases the deactivation as a function of time. The conversion of 1-3-dimethylcyclohexene-1 yields experimental evidence that a bifunctional path exists for the reaction in these conditions. The supposed intermediate olefin isomerizes and disproportionates faster than meta-xylene, but the ortho/para selectivity remains unchanged.

• OSTI ID: 5750414
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 126:2; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKENES
ALKYLATED AROMATICS
AROMATICS
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CYCLOALKENES
DEACTIVATION
ELEMENTS
HYDROCARBONS
HYDROGEN
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
ISOMERIZATION
KINETICS
MATERIALS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
PH VALUE
REACTION INTERMEDIATES
REACTION KINETICS
SURFACE PROPERTIES
SYNTHESIS
TIME DEPENDENCE
XYLENES
ZEOLITES