The present invention relates to a method for preparing an improved supported catalyst for hydrocracking of petroleum residue. The method of preparing supported catalyst is considered for possessing textural and mechanical properties for hydrocracking of petroleum residue. The improved supported catalyst comprises formulated alumina support extrudates and at least one metal from Group VIB and VIIIB of the periodic table. The supported catalysts are 0 characterized by definite combination of pseudo-boehmite and mixture of acids followed by metal component molar ratios. The final catalyst with homogeneously dispersed active metals is effective in converting petroleum residue for producing distillates.

The present invention relates to a method for preparing an improved supported catalyst for hydrocracking of petroleum residue. The method of preparing supported catalyst is considered for possessing textural and mechanical properties for hydrocracking of petroleum residue. The improved supported catalyst comprises formulated alumina support extrudates and at least one metal from Group VIB and VIIIB of the periodic table. The supported catalysts are 0 characterized by definite combination of pseudo-boehmite and mixture of acids followed by metal component molar ratios. The final catalyst with homogeneously dispersed active metals is effective in converting petroleum residue for producing distillates.

The present invention discloses an inventive method for manufacturing a catalyst using alloy granules having a high-Ni content. The inventive method may include providing alloy granules comprising aluminum and nickel, and treating the alloy granules with an alkaline solution to form the catalyst. A content of the nickel in the alloy granules may be within a range of about 43 wt % to about 60 wt %. The alloy granules may have effective diameters within a range of about 1 mm to about 10 mm. The catalyst may have an attrition value of less than about 7.0%.

The present disclosure relates to an ammoxidation catalyst for propylene, a manufacturing method of the same, and an ammoxidation method of propylene using the same. Specifically, in one embodiment of the present disclosure, there is provided a catalyst having a structure in which a metal oxide is supported on a silica support having a narrow particle size distribution, and excellent wear resistance.

The present disclosure relates to an ammoxidation catalyst for propylene, a manufacturing method of the same, and an ammoxidation method of propylene using the same. Specifically, in one embodiment of the present disclosure, there is provided a catalyst having a structure in which a metal oxide is supported on a silica support having a narrow particle size distribution, and excellent wear resistance.

A method for purifying combustion exhaust gas, comprising: placing a denitration catalyst in gas stream to remove nitrogen oxides from a combustion exhaust gas, wherein the denitration catalyst comprises a shaped product comprising a catalyst component and having microcracks on the surface of the shaped-product, and 80% to 100% of the microcracks on the number basis have an angle of a longitudinal direction of the microcracks with respect to a main direction of the gas stream within 30 degrees.

The preparation method (100) for preparing a generally spherical catalyst precursor material comprises: a formation step (101) for forming a generally spherical support comprising mesoporous alumina (Al.sub.2O.sub.3) or an alumina precursor and having a sphericity factor greater than 0.75, preferably greater than 0.80 and more preferably greater than 0.85, an incorporation step (102) for incorporating a nickel precursor into the support comprising mesoporous alumina (Al.sub.2O.sub.3) or an alumina precursor by bringing a composition comprising the nickel precursor into contact with the support and a calcination step (103) for calcining the support incorporating the nickel precursor to at least partially transform the nickel precursor into nickel oxide (NiO) and the alumina precursor into alumina, and subsequently form a solid having a generally spherical shape, the solid being referred to as a sphere made of a catalyst precursor material for a methanation reaction.

The preparation method (100) for preparing a generally spherical catalyst precursor material comprises: a formation step (101) for forming a generally spherical support comprising mesoporous alumina (Al.sub.2O.sub.3) or an alumina precursor and having a sphericity factor greater than 0.75, preferably greater than 0.80 and more preferably greater than 0.85, an incorporation step (102) for incorporating a nickel precursor into the support comprising mesoporous alumina (Al.sub.2O.sub.3) or an alumina precursor by bringing a composition comprising the nickel precursor into contact with the support and a calcination step (103) for calcining the support incorporating the nickel precursor to at least partially transform the nickel precursor into nickel oxide (NiO) and the alumina precursor into alumina, and subsequently form a solid having a generally spherical shape, the solid being referred to as a sphere made of a catalyst precursor material for a methanation reaction.