Bulk catalysts comprised of nickel, molybdenum, tungsten and titanium and methods for synthesizing bulk catalysts are provided. The catalysts are useful for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.

The present disclosure provides a catalyst for a water gas shift reaction at middle temperature, the catalyst comprising a catalytically active component containing 40 to 80 mol % of copper (Cu), 15 to 50 mol % of zinc (Zn), and 1 to 13 mol % of aluminum (Al), relative to all metals of the catalyst, wherein an aluminum-rich layer is present in a surface layer of a particle of the catalyst. Furthermore, the present disclosure provides a preparation method of the catalyst, and a hydrogen preparation method using the same.

Provided are titanium oxide fine particles capable of enhancing the photocatalytic activity of a photocatalyst when mixed with such photocatalyst. There are provided titanium oxide fine particles with at least an iron component and a silicon component solid-dissolved therein, in which the iron and silicon components are each contained in an amount of 1 to 1,000 in terms of a molar ratio to titanium (Ti/Fe or Ti/Si); and a titanium oxide fine particle dispersion liquid in which these titanium oxide fine particles are dispersed in an aqueous dispersion medium.

A battery includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and an accommodating bag accommodating the electrode group along with an alkali electrolyte solution. The air electrode includes a catalyst for an air secondary battery. This catalyst for an air secondary battery is produced by a method for producing a catalyst for an air secondary battery, the method including a precursor preparation step of preparing a bismuth-ruthenium oxide precursor, a calcination step of calcining the bismuth-ruthenium oxide precursor obtained in this precursor preparation step to form a bismuth-ruthenium oxide, and a nitric acid treatment step of immersing the bismuth-ruthenium oxide obtained by this calcination step in a nitric acid aqueous solution.

A method of preparing a calcined hydrogenolysis/hydrogenation catalyst includes mixing a copper-containing material, manganese-containing material, sodium aluminate, and water to obtain an aqueous slurry; contacting the aqueous slurry with a caustic material to form a precipitate in a caustic aqueous slurry; removing the precipitate from the caustic aqueous slurry; and removing residual water from the precipitate to form a dried precipitate; calcining the dried precipitate to form the calcined hydrogenolysis/hydrogenation catalyst exhibiting a Brunauer-Emmett-Teller (“BET”) surface area of about 5 m.sup.2/g to about 75 m.sup.2/g. The calcined hydrogenolysis/hydrogenation catalyst may include a spinel structure crystallite size of about 15 nm or less. The calcined hydrogenolysis/hydrogenation catalyst may include a tenorite crystallite size of about 20 nm to 30 nm.

Methods of producing an isomerization catalyst include preparing a catalyst precursor solution, hydrothermally treating the catalyst precursor solution to produce a magnesium oxide precipitant, and calcining the magnesium oxide precipitant to produce the isomerization catalyst. The catalyst precursor solution includes at least a magnesium precursor, a hydrolyzing agent, and cetrimonium bromide. Methods of producing 1-butene from a 2-butene-containing feedstock with the isomerization catalyst are also disclosed.

Catalyst for oxygen storage capacity applications that include a zinc doped manganese-iron spinel mixed oxide material. The zinc doped manganese-iron spinel mixed oxide material may be synthesized by a co-precipitation method using a precipitation agent such as sodium carbonate and exhibits a high oxygen storage capacity.

Disclosed is a mixed oxide comprising Ce.sub.aZr.sub.bM.sub.cL.sub.dO.sub.z, where: M is Y, Sc, Ca, Mg or a mixture thereof; L is one or more rare earth elements, not including Y or Sc; 0.30≤a≤0.60; 0<c≤0.3; d≤0.1; b=1−(a+c+d); and when M is trivalent, z=(2a+2b+1.5d+1.5c), or when M is divalent, z=(2a+2b+1.5d+c).

The present invention relates to a method for preparing a sulfated metal oxide catalyst for chlorination, and a method for producing a reaction product containing methyl chloride (CH.sub.3Cl) by using the sulfated metal oxide catalyst. A sulfated zirconia catalyst and a sulfated tin oxide catalyst are disclosed as the sulfated metal oxide catalyst for chlorination.

A method for preparing a zinc ferrite-based catalyst comprising: obtaining a precipitate by bringing a metal precursor solution including a zinc precursor, a ferrite precursor, a solution containing an acid and water into contact with a basic aqueous solution; filtering the precipitate; drying the filtered precipitate; and firing the dried precipitate, wherein the solution containing the acid includes one or more of nitric acid (HNO.sub.3) and hydrocarbon acid.