An alkylaromatic conversion catalyst system having (a) a first catalyst composition having (i) a carrier which includes a binder composition prepared from a mixture having one or more oligomerized alkoxy silicates and one or more hydrolyzing agents; and a ZSM-5 zeolite; (ii) one or more metals chosen from the group consisting of Groups 6, 9, 10 and 11; and optionally, (iii) a Group 14 metal; and (b) a second catalyst composition having (i) a carrier which includes a refractory oxide binder and a zeolite selected from one or more of ZSM-5, ferrierite, ZSM-11, ZSM-12 and EU-1; (ii) one or more metals chosen from the group consisting of Groups 6, 9, 10 and 11; and optionally, (iii) a Group 14 metal.

Disclosed are a bifunctional catalyst and a preparation method therefor, the bifunctional catalyst being suitable to produce high-value aromatic hydrocarbons by subjecting alkylaromatic hydrocarbons to a disproportionation/transalkylation/dealkylation reaction while suppressing aromatic loss or subjecting C8 aromatic hydrocarbons to an isomerization reaction while suppressing xylene loss.

Catalysts and method of preparing the catalysts are disclosed. One of the catalysts includes a zeolite support, a Group VIII metal on the zeolite support, and at least two halides bound to the zeolite support, to the Group VIII metal, or to both, and can have an average crush strength greater than 11.25 lb based on at least two samples of pellets of the catalyst measured in accordance with ASTM D4179.

Catalysts and method of preparing the catalysts are disclosed. One of the catalysts includes a zeolite support, a Group VIII metal on the zeolite support, and at least two halides bound to the zeolite support, to the Group VIII metal, or to both, and can have an average crush strength greater than 11.25 lb based on at least two samples of pellets of the catalyst measured in accordance with ASTM D4179.

Catalysts and method of preparing the catalysts are disclosed. One of the catalysts includes a zeolite support, a Group VIII metal on the zeolite support, and at least two halides bound to the zeolite support, to the Group VIII metal, or to both, and can have an average crush strength greater than 11.25 lb based on at least two samples of pellets of the catalyst measured in accordance with ASTM D4179.

Provided is an application of a metal hydride/palladium compound system in the preparation of a 1,3-dicarbonyl compound in a cascade reaction of an electron-deficient alkene compound, said reaction comprising the following steps: under the protection of nitrogen, a palladium compound and a metal hydride are suspended and stirred in a solvent, then an electron-deficient alkene compound is added; the mixture reacts at 0° C. to 100° C. for 0.3 to 10 hours; a saturated ammonium chloride aqueous solution is added to stop the reaction, and then extraction, drying by evaporation and purification by column chromatography are performed to obtain the product of 1,3-dicarbonyl compound. The hydride and palladium compound catalysts used in the method are reagents easily obtained in a laboratory; compared with the commonly used methods of hydrogenation with hydrogen gas, the method can be easily operated, and has high safety, mild conditions and high reaction yield.

Metal oxides are provided that have selective hydrogen combustion activity while also acting as solid oxygen carriers (SOCs). The metal oxides correspond to a metal oxide core of at least one metal having multiple oxidation states that is modified with an alkali metal oxide and/or alkali metal halogen (such as an alkali metal chloride). The resulting modified metal oxide, corresponding to a solid oxygen carrier, can allow for selective combustion of hydrogen while reducing or minimizing combustion of hydrocarbons, such as within a propane dehydrogenation environment. Additionally, it has been unexpectedly found that modifying the core metal oxide with the alkali metal oxide and/or alkali metal chloride can also mitigate coke formation on the solid oxygen carrier. Methods of using such metal oxides for selective hydrogen combustion are also provided.

Disclosed are a bifunctional catalyst and a preparation method therefor, the bifunctional catalyst being suitable to produce high-value aromatic hydrocarbons by subjecting alkylaromatic hydrocarbons to a disproportionation/transalkylation/dealkylation reaction while suppressing aromatic loss or subjecting C8 aromatic hydrocarbons to an isomerization reaction while suppressing xylene loss.

Disclosed are a bifunctional catalyst and a preparation method therefor, the bifunctional catalyst being suitable to produce high-value aromatic hydrocarbons by subjecting alkylaromatic hydrocarbons to a disproportionation/transalkylation/dealkylation reaction while suppressing aromatic loss or subjecting C8 aromatic hydrocarbons to an isomerization reaction while suppressing xylene loss.

A process for acid catalyzed alkylation involving the use of surfactants which form bi-continuous micro-emulsions with the liquid acid and the hydrocarbon is described. The bicontinuous phase formed between the hydrocarbon and liquid acid phases at surfactant addition facilitates and improves the liquid acid catalyzed alkylation reactions including motor-fuel alkylation reaction.