Oxidative coupling of toluene to stilbene

Journal Article · Fri Jun 01 00:00:00 EDT 1979 · Ind. Eng. Chem., Prod. Res. Dev.; (United States)

DOI:https://doi.org/10.1021/i360070a007· OSTI ID:7051584

Hupp, S S; Swift, H E

Oxidative coupling of toluene to stilbene, over supported lead and bismuth oxides, which involves hydrogen removal from toluene by lattice oxygen occurred with good selectivities but low reaction rates. Modification of PbO with other metals increased toluene conversion but decreased the selectivity. The selectivity also rapidly deteriorated with increasing surface area of the support, whereas low-surface-area catalysts showed rapid loss of metal oxide by attrition. The best results were obtained with 15Vertical Bar3< PbO supported on pure alumina (Carborundum Co.'s SAHT 99-16 grade) and 20Vertical Bar3< PbO on 99Vertical Bar3< Al/sub 2/O/sub 3//3.3Vertical Bar3< SiO/sub 2/ (SAEHS-1 grade), i.e., 30.3 and 32Vertical Bar3< toluene conversions with 55.4 and 63.8Vertical Bar3< selectivities for stilbene, respectively, at 600/sup 0/C and 1 atm, and low attrition losses, especially for the latter catalyst, in which 98Vertical Bar3< of PbO was bound in a mixed aluminosilicate. However, the activity of this catalyst markedly deteriorated in five days onstream. The reaction selectivity decreased with increasing temperature (575/sup 0/-625/sup 0/C) and with progressive oxygen depletion of the catalysts. Efficient catalyst regeneration can be provided by a specially designed circulating fluid-bed reactor.

• Research Organization: Gulf Res. and Dev. Co.
• OSTI ID: 7051584
• Journal Information: Ind. Eng. Chem., Prod. Res. Dev.; (United States), Vol. 18:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BISMUTH OXIDES
CATALYTIC EFFECTS
LEAD OXIDES
STILBENE
CHEMICAL REACTION YIELD
TOLUENE
OXIDATION
CHEMICAL REACTION KINETICS
ALKYLATED AROMATICS
AROMATICS
BISMUTH COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
HYDROCARBONS
KINETICS
LEAD COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
YIELDS
400301* - Organic Chemistry- Chemical &amp; Physicochemical Properties- (-1987)
400201 - Chemical &amp; Physicochemical Properties