Reactions of aromatic hydrocarbons over zeolite. beta

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(89)90134-6· OSTI ID:6945183

Ratnasamy, P; Bhat, R N; Pokhriyal, S K; Hegde, S G; Kumar, R ^[1]

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1. National Chemical Laboratory, Pune (India)

The catalytic properties of zeolite {beta} in the isomerization of metaxylene, and the methylation and disproportionation of toluene have been measured and compared with those of other zeolites like ZSM-5, -23, -48, and -50. While zeolite {beta} does not exhibit product shape selectivity among the xylene isomers, it suppresses the formation of the bulky 1.3.5 isomer among trimethylbenzenes leading to high concentrations of the 1.2.4 isomer with the minimum cross section. The disproportionation-to-isomerization ratio in the reactions of metaxylene over these zeolites follows the order {beta} > ZSM-50 > ZSM-5 > ZSM-48 > ZSM-23 > ZSM-22. A comparison of {beta} with ZSM-5 in the xylene isomerization process using industrial feedstock reveals similar trends. The observed shape-selective properties of {beta} in these reactions of aromatic hydrocarbons are explained in terms of its 12-membered three-dimensional pore structure.

• OSTI ID: 6945183
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 119:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKYLATED AROMATICS
AROMATICS
CATALYSIS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CRYSTAL STRUCTURE
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOMERIZATION
KINETICS
MATERIALS
METHYLATION
MICROSTRUCTURE
MINERALS
ORGANIC COMPOUNDS
OXIDATION
POROSITY
REACTION KINETICS
REDUCTION
TOLUENE
XYLENES
ZEOLITES