A reversible enrichment material, its preparation and application thereof are provided. The reversible enrichment material includes an inorganic carrier; and an active metal salt, a first metal salt promoter and a second metal salt promoter supported on the inorganic carrier. The active metal salt is a soluble silver salt, a soluble copper salt, or a combination thereof. The first metal salt promoter is one or more selected from the group consisting of soluble salts of Group IA, Group IIA and Group IIIA metals, and the second metal salt promoter is one or more selected from the group consisting of soluble salts of transition metals other than Group IB metals. The reversible enrichment material can realize effective separation of saturated hydrocarbon from unsaturated hydrocarbon and has good reversibility.

To provide a porous silica which is capable of effectively eliminating odors of methyl mercaptan, hydrogen sulfide, nonenal and the like, said odors being difficult to be eliminated by a silica porous material that contains no metal. A porous silica containing particles that are provided with primary pores, wherein the particles contain a metal containing substance complex having a particle size of 1-100 nm. This porous silica has a specific surface area of 500 m.sup.2/g or more.

The present application relates to a process for treating gasoline, comprising the steps of: contacting a gasoline feedstock with a mixed catalyst and subjecting it to desulfurization and aromatization in the presence of hydrogen to obtain a desulfurization-aromatization product; optionally, splitting the resulting desulfurization-aromatization product into a light gasoline fraction and a heavy gasoline fraction; and, optionally, subjecting the resulting light gasoline fraction to etherification to obtain an etherified oil; wherein the mixed catalyst comprises an adsorption desulfurization catalyst and an aromatization catalyst. The process of the present application is capable of reducing the sulfur and olefin content of gasoline and at the same time increasing the octane number of the gasoline while maintaining a high yield of gasoline.

The present application relates to a process for treating gasoline, comprising the steps of: contacting a gasoline feedstock with a mixed catalyst and subjecting it to desulfurization and aromatization in the presence of hydrogen to obtain a desulfurization-aromatization product; optionally, splitting the resulting desulfurization-aromatization product into a light gasoline fraction and a heavy gasoline fraction; and, optionally, subjecting the resulting light gasoline fraction to etherification to obtain an etherified oil; wherein the mixed catalyst comprises an adsorption desulfurization catalyst and an aromatization catalyst. The process of the present application is capable of reducing the sulfur and olefin content of gasoline and at the same time increasing the octane number of the gasoline while maintaining a high yield of gasoline.

Sorbent materials contain carbonaceous material that has been activated to form a precursor activated carbon have been subjected to a pretreatment with an acid or a base followed optionally by thermal oxidation are useful for treating water. The sorbent material is made by contacting the precursor activated carbon with a nitrogen source and a metal source, and optionally by thermally oxidizing the precursor activated carbon. The resulting doped precursor activated is also calcined.

To provide a porous silica which is capable of effectively eliminating odors of methyl mercaptan, hydrogen sulfide, nonenal and the like, said odors being difficult to be eliminated by a silica porous material that contains no metal. A porous silica containing particles that are provided with primary pores, wherein the particles contain a metal containing substance complex having a particle size of 1-100 nm. This porous silica has a specific surface area of 500 m.sup.2/g or more.

A crystalline sorbent material of formula: A.sub.bM[M(CN).sub.6]y.Math.nH.sub.2O wherein A is a group 1 metal; b is from 0.001 to 0.3; M is a transition metal; M is iron or cobalt; y is from 0.65 to 0.80; and n is from 0 to 7. The crystalline sorbent materials of the present invention may be used in a method of capturing water. The method of the present invention utilising such crystalline sorbent materials may be used in water capture and purification processes to provide fresh water suitable for drinking or for use in agriculture. The method of the present invention may also be used to remove water as a contaminant or for use in dehumidification processes. A use of such a crystalline sorbent material is also disclosed.

A ZnFe(BO.sub.3)O/Fe.sub.2CaO.sub.4/C nanocomposite material includes an orthorhombic zinc iron borate oxide (ZnFe(BO.sub.3)O) phase and an orthorhombic iron calcium oxide (Fe.sub.2CaO.sub.4) phase. The ZnFe(BO.sub.3)O/Fe.sub.2CaO.sub.4/C nanocomposite material includes irregularly shaped granular and flake-like particles. Further, a method of producing the ZnFe(BO.sub.3)O/Fe.sub.2CaO.sub.4/C nanocomposite material includes calcining metal precursors.