نتایج جستجو برای: homogeneous co oligomerization of olefins

تعداد نتایج: 21201291  

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 1991
m.m akbarnejad m. oskooie m. gharanfoli

fischer-tropsch catalysts with high activity and selectivity for olefins were produced using mordenite type sio2/al2o3= 12, 20, 28, 62 zeolite supported iron carbonyl compounds and were characterized by x-ray powder diffraction. the adsorptionof volatile fe(co)5 on the support surface was carried out under vacuum at room temperature. reduction les were monitored by vibrating sample magnetometer...

Journal: :Chemical Engineering & Technology 2021

In Fischer-Tropsch synthesis (FTS), a variety of hydrocarbons with different chain lengths are formed. The selectivities depend on the catalyst and reaction conditions. Co-feeding olefins allows changing selectivity even outside rules Anderson-Schulz-Flory distribution. this work, ethene, propene, 1-butene were co-fed to Co-Mn-catalyzed FTS increase olefin in C3- C8-fraction. An CO rate oxygena...

Journal: :Angewandte Chemie 2008
Helmut G Alt Ingrid K Böhmer

The catalytic activation of alkanes under mild conditions to give the corresponding alkenes and hydrogen has tremendous industrial implications because olefins are the most important starting materials for large-scale industrial processes such as olefin polymerization, dimerization, oligomerization, hydroformylation, and metathesis. In the search for a process by which olefins can be produced f...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده ادبیات و علوم انسانی 1389

?it is of utmost priority for an experienced teacher to train the mind of the students, and enable them to think critically and correctly. the most important question here is that how to develop such a crucial ability? this study examines a new way to the development of critical thinking utilizing critical discourse analytical tools. to attain this goal, two classes of senior english la...

2009
Daniel Robbins

1 RHODIUM-CATALYZED STEREOSELECTIVE HYDROFORMYLATION Reported by Daniel Robbins October 16, 2008 INTRODUCTION Hydroformylation, the conversion of olefins into aldehydes through the addition of CO and H2, is an important industrial reaction that employs homogeneous catalysis by transition metals (Figure 1). Hydroformylation is a valuable reaction in organic chemistry because it produces aldehyde...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده علوم 1388

heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...

Journal: :Chemical communications 2006
Laurel A Goj Marty Lail Karl A Pittard Kimberly C Riley T Brent Gunnoe Jeffrey L Petersen

Stoichiometric reactions of TpRu(CO)(NCMe)(Ph) with electron-rich olefins result in metal-mediated cleavage of C-S and C-O bonds.

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