Effect of aging of the pillaring reagent on the microstructure and cracking activity of pillared clay

Conference · Sat Aug 01 04:00:00 EDT 1987 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)

OSTI ID:5336090

Harris, J R ^[1]

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1. Phillips Petroleum Company, Bartlesville, OK (USA)

Pillared interlayer clay (PILC) is formed by exchanging large hydroxyaluminum polycations into the interlayer of a smectite clay such as montmorillonite, which is made up of sheet-like silica/alumina layers. Calcination of the exchanged clay gives a well dispersed array of metal oxide clumps (i.e., pillars) bonded top and bottom to the silica/alumina layers of the clay. The permanent separation of the clay layers gives an 8 to 10-fold increase in surface area, from 30 to 250-300 m{sup 2}/g, and a microporous structure similar to but less constrained than that of zeolites. Recently, there has been an increased interest in the use of these clays as cracking catalysts. For example, pillared clays have been shown to be an active cracking catalyst for both single component and gas oil feeds. PILC's also lead to both higher light cycle oil (LCO) and coke yields than conventional cracking catalysts. Commercially available, metal-hydrolyzed hydroxyaluminum solutions containing chlorhydrol, A1{sub 2}(OH){sub 5}C1.2H{sub 2}O, have been used as one source of the polycation solution. The approach of these hydrolyzed polycation solutions to equilibrium is known as aging. During the aging process certain polycationic species disappear from the solution and new species are formed. For this reason, the aging process can have a significant influence on the properties of the pillared clays. The objective of this work was to determine how the physical and catalytic properties of the pillared clay depend on the aging of dilute cholorhydrol solutions.

• OSTI ID: 5336090
• Report Number(s): CONF-8708311--
• Conference Information: Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) Journal Volume: 32:3
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
AGING
ALCOHOLS
CATALYSIS
CATALYSTS
CATALYTIC CRACKING
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
CLAYS
CRACKING
CRYSTAL STRUCTURE
DATA
DECOMPOSITION
DISPERSIONS
EXPERIMENTAL DATA
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
MICROSTRUCTURE
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
PYROLYSIS
SOLUTIONS
SYNTHESIS
THERMOCHEMICAL PROCESSES