King Fahd University of Petroleum and Minerals

Saudi Arabian Oil Company

Bassam El Ali

Mansur Bala Ibrahim

Rami Khalid Suleiman

Ahmad A Sorour

Mohammed Fettouhi

Waseem Mansour

Sol-gel coating formulations including metal oxide particles such as aluminum oxide, calcium oxide, zinc oxide, magnesium oxide, and molybdenum oxide embedded in a hybrid polymer matrix based on a reacted form of a resin composition containing a tetraalkylorthosilicate, an aminoalkylsilane, a dialkoxysilane, and a silanol terminated polydimethylsiloxane. The sol-gel coating formulations are suitable for applications such as anticorrosive protective coatings of metal substrates (e.g. mild steel). These anticorrosive coated metal substrates are evaluated on their hydrophobicity (water contact angle), surface roughness, mechanical strength (e.g. hardness), adhesiveness to the substrate (e.g. critical load), and anticorrosiveness upon exposure to a saline solution (e.g. impedance value).

Cured siloxane coating and anticorrosion substrate formed therewith

Method for forming a sol-gel coating formulation

This disclosure relates to N-substituted Pd(II)-N-heterocyclic carbene-pyridine complexes, methods of preparing the complexes, and methods of using the complexes in Sonogashira coupling reactions.

Synthesis of alkynones via carbonylative Sonogashira coupling reactions catalyzed by Pd(II)-N-Heterocyclic carbene-pyridine complexes

Metal oxide-containing sol-gel coating formulations

Palladium catalysts, methods of synthesizing palladium-carbene catalysts, and methods of producing chromones and aurones using palladium-N-heterocyclic carbene (NHC) catalysts are provided. In some implementations, the palladium catalysts include a bridged palladium catalyst with distorted square planar geometry around the center palladium atom. The catalysts can be used in cyclocarbonylative Sonogashira cross-coupling reactions to produce chromones and aurones at a high yield. The selectivity of the catalysts can be adjusted by adjusting reaction conditions.

Selective cyclocarbonylative coupling of 2-iodophenols with terminal alkynes catalyzed by bridged bis(NHC)Pd(II)Brcatalysts

This disclosure relates to bridged bis(N-heterocyclic carbene)palladium(II) complexes, methods of preparing the complexes, and methods of using the complexes in Suzuki-Miyaura coupling reactions.

Synthesis of biaryl ketones and biaryl diketones via carbonylative Suzuki-Miyaura coupling reactions catalyzed by bridged bis(N-heterocyclic carbene)palladium(II) catalysts

A solid-supported catalyst ligand which chelates palladium (II) species to form a complex that functions as a heterogeneous catalyst that is stable and can be recycled without significantly losing any catalytic activity in a variety of chemical transformations, a method for producing the solid-supported catalyst ligand and a method for catalyzing a palladium cross-coupling reaction, such as the Suzuki-Miyaura, Mizoroki-Heck, and Sonagashira reactions.

Aryl halide cross-coupling method and product made therefrom

Solid-supported catalyst for cross-coupling

Solid-supported palladium (II) complex as a heterogeneous catalyst for cross coupling reactions and methods thereof

A solid-supported palladium(II) complex which catalyzes the Mizoroki-Heck coupling reaction efficiently and a method of employing the solid-supported palladium(II) complex to synthesize cinnamic acid and derivatives thereof. The solid-supported palladium(II) complex is also stable and can be recycled without significantly losing catalytic activity.

Method for catalytic synthesis of cinnamic acid with catalyst recycle

Method for making and using a solid-supported catalyst

Palladium(II)-silica supported catalyst

Method for palladium-catalyzed cinammic acid formation

Solid-supported palladium(II) complex for catalyzing Mizoroki-Heck coupling reactions and a method thereof

Composite resins produced from chemical reactions among a polyglycol epoxide liquid epoxy resin, an aminosilane, tri- and/or tetra-alkoxysilanes and an isocyanate. The hybrid compositions are prepared by an in situ sol-gel process where components of the composition are mixed together sequentially. The composite resins are formed by a coupling reaction between the epoxide groups of the epoxy resin and the amino groups of the aminosilane. The silanes are hydrolyzed to form silanol groups which then undergo polycondensation to form an inorganic polymeric network of an intermediate. Finally, urethane moieties are introduced to the composite resins when unreacted hydroxyl groups from the intermediate react with the isocyanate. These composite resins are evaluated as protective coatings of mild steel substrates, including mechanical strength, anticorrosiveness in a saline medium, and adhesiveness to the mild steel substrates.

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Dhahran, Saudi Arabia

Bassam El Ali