Acidity of nickel silicate and its bearing on the catalytic activity for ethylene dimerization and butene isomerization
Journal Article
·
· J. Catal.; (United States)
Experimental results obtained with nickel silicate catalysts precipitated at pH 6-10 (Group 1) or containing 4-90% nickel oxide (Group 2) provided evidence that 1-butene was the primary product of ethylene dimerization; that 2-butene was a secondary isomerization product; that the selectivity for 2-butene isomerization ran parallel to the previously measured dimerization activity, i.e., had maxima at 100/sup 0/ and 600/sup 0/C pretreatment temperatures; that the montmorillonite sites which were activated at 100/sup 0/C consisted of protonic acid sites; that the protonic sites for dimerization and isomerization differed and that the number of isomerization sites was about one order of magnitude greater than that of dimerization sites; and that the antigorite sites activated at 600/sup 0/C were nonprotonic acid sites. The experiments included n-butylamine titration with dicinnamalacetone indicator, ammonia chemisorption, selective poisoning studies with water and sodium, deuterium tracer studies, and IR spectroscopy.
- Research Organization:
- Tokyo Inst. of Technol.
- OSTI ID:
- 6360648
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 61:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKENES
BUTENES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ACTIVATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DIMERIZATION
ETHYLENE
HYDROCARBONS
ISOMERIZATION
KINETICS
NICKEL COMPOUNDS
NICKEL OXIDES
NICKEL SILICATES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
POLYMERIZATION
REACTION KINETICS
SILICATES
SILICON COMPOUNDS
STRUCTURAL CHEMICAL ANALYSIS
SURFACES
TRANSITION ELEMENT COMPOUNDS
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKENES
BUTENES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL ACTIVATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DIMERIZATION
ETHYLENE
HYDROCARBONS
ISOMERIZATION
KINETICS
NICKEL COMPOUNDS
NICKEL OXIDES
NICKEL SILICATES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
POLYMERIZATION
REACTION KINETICS
SILICATES
SILICON COMPOUNDS
STRUCTURAL CHEMICAL ANALYSIS
SURFACES
TRANSITION ELEMENT COMPOUNDS