Disproportionation of toluene over a HY/. beta. -AlF/sub 3//Cu catalyst--1. Preparation and characterization

Journal Article · Wed Aug 01 04:00:00 EDT 1979 · J. Catal.; (United States)

OSTI ID:6211398

Aneke, L E; Gerritsen, L A; Van Den Berg, P J; De Jong, W A

The selectivity for xylene and stability of HY zeolite were improved by addition of ..beta..-aluminum fluoride and copper. Best performance was obtained with a catalyst containing 72% by wt zeolite, 18% aluminum fluoride, and 10% copper, pretreated in hydrogen at 500/sup 0/C for 18 hr, which gave 92% selectivity at 25% conversion at 500/sup 0/C, 1 atm, a hydrogen-toluene feed ratio of 16.7:1, and a time factor of 176 g hr/mole, after 1.5 mo operation. Analyses of new and used catalysts by nitrogen and ammonia adsorption, and mercury penetration measurements suggested that the disproportionation activity is located in the transitional (2-20nm) pores; that the micropore volume decreases during operation by collecting heavy reaction products, which increases the selectivity as the conversion decreases; and that Broensted sites are the active centers.

• Research Organization: Delft Univ. of Technology
• OSTI ID: 6211398
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 59:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKYLATED AROMATICS
ALUMINIUM COMPOUNDS
ALUMINIUM FLUORIDES
AROMATICS
BROENSTED ACIDS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COPPER
CRYSTAL STRUCTURE
DATA
ELEMENTS
EXPERIMENTAL DATA
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
METALS
MICROSTRUCTURE
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
POROSITY
REDUCTION
STABILITY
SYNTHESIS
TOLUENE
TRANSITION ELEMENTS
XYLENES
YIELDS
ZEOLITES