Propylene epoxidation over titanium-on-silica catalyst—the heart of the SMPO process

Buijink, Jan-Karel F.; Vlaanderen, Jelle; Crocker, Mark; Niele, F.G.M.

doi:10.1016/j.cattod.2004.06.041

Cited by 85 publications

(71 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As a consequence, epoxidation of alkenes is a field of both academic and industrial importance. Homogeneous molybdenum (VI) [8] and heterogeneous titaniumon-silica (TiO 2 -SiO 2 ) [9] are notable examples of catalysts used for industrial epoxidation of propylene to propylene oxide using alkyl hydroperoxides as oxidising reagents.…”

Section: Introductionmentioning

confidence: 99%

Efficient epoxidation of cyclododecene and dodecene catalysed by polybenzimidazole supported Mo(VI) complex

et al. 2015

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Efficient epoxidation of cyclododecene and dodecene catalysed by polybenzimidazole supported Mo(VI) complex

et al. 2015

View full text Add to dashboard Cite

“…3,19 The disposal of a homogeneous catalyst causes a waste/separation problem. After the reactor, the propene and propene oxide are removed consecutively from the liquid stream.…”

Section: Current Processesmentioning

confidence: 99%

The Production of Propene Oxide: Catalytic Processes and Recent Developments

Nijhuis

Makkee

Moulijn

et al. 2006

Ind. Eng. Chem. Res.

482

405

View full text Add to dashboard Cite

Propene oxide, which is one of the major commodity chemicals used in chemical industry, desperately requires a new process for its production, because of the disadvantages that are encountered with the currently available processes. This paper discusses the existing processes used for the production of propene oxidesthe chlorohydrin and hydroperoxide processessand their advantages and disadvantages. Furthermore, the new processes and catalysts under development for the propene oxide production are discussed, as well as the challenges that are still limiting the applications of some of those prospects. The most important new developments for the production of propene oxide discussed in this paper are: the hydrogen peroxide combination process, the ethene oxide alike silver catalysts, the molten salt systems, and the gold-titania catalyst systems.

show abstract

“…In fact, it is now generally accepted that the active site of this type of catalyst (oxide-supported titanium complexes and titanium silicates) involves isolated open sites, that is, tetrahedral isolated titanium (IV) centres linked to the surface by siloxy bridges. 27 Asymmetric oxidation of sulfide on Ti-MCM41 Chiral titanium complexes have proved to be useful catalysts in several asymmetric oxidations. [28][29][30][31] This fact, together with the usefulness of optically active sulfoxides in asymmetric synthesis of organic compounds, prompted us to study the effect of a chiral modifier on the Ti-MCM41catalysts.…”

Section: Catalytic Oxidation Of Sulfide On Ti-mcm41mentioning

confidence: 99%

Effect of Thermal Treatment of MCM-41 on the Nature and Catalytic Properties of MCM41-supported Alkoxo-Titanium Species in Oxidation of Sulfides to Sulfoxides

Khedher

Ghorbel

2010

Journal of Chemical Research

View full text Add to dashboard Cite

Titanium tetra-isopropoxide reacts with the silanol groups of MCM41 calcined at two different temperatures, 550 and 750°C, to form well-defined surface organometallic species. For MCM41 calcined at 550°C, the amount of available silanol allows mainly the formation of the bipodal titanium complex, (≡SiO) 2 Ti(O i Pr) 2 , while calcination at 750°C leads to the formation of the monopodal titanium complex ≡SiO-Ti(O i Pr) 3 . Ti-MCM41 (750) was found to be more active and selective in the oxidation of sulfides, compared to Ti-MCM41 (550), and this can be attributed to the development of a large amount of tetrahedral isolated titanium (IV) which seems to be the active site in this reaction. In the asymmetric oxidation of sulfide by H 2 O 2 , Ti-MCM41 (750) was found also more reactive than Ti-MCM41(550), since it develops the singly bonded titanium species, ≡SiO-Ti(O i Pr) 3, which appears to be the chiral active site in this reaction.

show abstract

Propylene epoxidation over titanium-on-silica catalyst—the heart of the SMPO process

Cited by 85 publications

References 4 publications

Efficient epoxidation of cyclododecene and dodecene catalysed by polybenzimidazole supported Mo(VI) complex

Efficient epoxidation of cyclododecene and dodecene catalysed by polybenzimidazole supported Mo(VI) complex

The Production of Propene Oxide: Catalytic Processes and Recent Developments

Effect of Thermal Treatment of MCM-41 on the Nature and Catalytic Properties of MCM41-supported Alkoxo-Titanium Species in Oxidation of Sulfides to Sulfoxides

Contact Info

Product

Resources

About