A novel clay-based catalytic material: Preparation and properties

Journal Article · Wed May 01 04:00:00 EDT 1991 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(91)90026-Z· OSTI ID:5740830

Lussier, R J ^[1]

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1. W.R. Grace Co.-Conn., Baltimore, Md. (USA)

A novel acid-leached calcined laolin has been prepared by careful control of the calcination and acid leach conditions. A narrow calcination window gives an extremely acid-reactive calcined kaolin, which develops high surface areas at a rate much faster than that of samples calcined outside this range. This more acid active calcined kaolin also allows the use of extremely low levels of acid, which results in most of the alumina being in the solid phase during the entire leach step. Al{sup 27} NMR results indicate that most acid-reactive calcined clay has the lowest level of octahedral and the highest level of five-coordinate Al. Acids containing anions that do not complex with aluminum such as hydrochloric, nitric, or aluminum chloride work in this process, while acids containg anions that complex with aluminum such a sulfuric or phosphoric do not lead to the same high surface area, catalytically active products. Properly calcined and leached materials show a broad distribution of pores centered at about 40 (angstrom).

• OSTI ID: 5740830
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 129:1; 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
ALUMINIUM 27
ALUMINIUM COMPOUNDS
ALUMINIUM ISOTOPES
ALUMINIUM OXIDES
CALCINATION
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CLAYS
CRACKING
CRYSTAL STRUCTURE
DECOMPOSITION
DISSOLUTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GAS OILS
HALOGEN COMPOUNDS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ISOTOPES
KAOLIN
LEACHING
LIGHT NUCLEI
MAGNETIC RESONANCE
MICROSTRUCTURE
NITRIC ACID
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
POROSITY
PYROLYSIS
RESONANCE
SEPARATION PROCESSES
STABLE ISOTOPES
SURFACE AREA
SURFACE PROPERTIES
SYNTHESIS
THERMOCHEMICAL PROCESSES