The invention relates to an oxygen carrier solid, its preparation and its use in a method of combustion of a hydrocarbon feedstock by active mass chemical-looping oxidation-reduction, i.e. chemical-looping combustion (CLC). The solid, which is hi the form of particles, comprises an oxidation-reduction active mass composed of metal oxide(s) dispersed in a ceramic matrix comprising at least at least one feldspar or feldspathoid with a melting point higher than 1500 C., such as celsian, and has, initially, a specific macroporous texture. The oxygen carrier solid is prepared from a precursor of the ceramic matrix, obtained from a macroporous zeolitic material with zeolite crystals of a specific size, and a precursor of the oxidation-reduction active mass.

The invention relates to an oxygen carrier solid, its preparation and its use in a method of combustion of a hydrocarbon feedstock by active mass chemical-looping oxidation-reduction, i.e. chemical-looping combustion (CLC). The solid, which is hi the form of particles, comprises an oxidation-reduction active mass composed of metal oxide(s) dispersed in a ceramic matrix comprising at least at least one feldspar or feldspathoid with a melting point higher than 1500 C., such as celsian, and has, initially, a specific macroporous texture. The oxygen carrier solid is prepared from a precursor of the ceramic matrix, obtained from a macroporous zeolitic material with zeolite crystals of a specific size, and a precursor of the oxidation-reduction active mass.

Disclosed are a spherical titanium silicalite catalyst and a preparation method therefor. The spherical titanium silicalite catalyst has the following composition: xTiO.sub.2.Math.(1?x)SiO.sub.2/yMPO.sub.4, wherein x is equal to 0.0005-0.04, y is equal to 0.005-0.20, M is a metal element selected from alkaline earth metals, transition metals or combinations of two or more thereof. The spherical titanium silicalite catalyst is prepared by the following method: (i) providing titanium silicalite raw powder with the composition of xTiO.sub.2.Math.(1?x)SiO.sub.2, wherein x is equal to 0.0005-0.04, and y is equal to 0.005-0.20; (ii) mixing silica sol, an organic template agent and phosphate in proportion to obtain an adhesive; and (iii) mixing the adhesive with the titanium silicalite raw powder, and carrying out spray-drying molding and firing to obtain the titanium silicalite catalyst.

Disclosed are a spherical titanium silicalite catalyst and a preparation method therefor. The spherical titanium silicalite catalyst has the following composition: xTiO.sub.2.Math.(1?x)SiO.sub.2/yMPO.sub.4, wherein x is equal to 0.0005-0.04, y is equal to 0.005-0.20, M is a metal element selected from alkaline earth metals, transition metals or combinations of two or more thereof. The spherical titanium silicalite catalyst is prepared by the following method: (i) providing titanium silicalite raw powder with the composition of xTiO.sub.2.Math.(1?x)SiO.sub.2, wherein x is equal to 0.0005-0.04, and y is equal to 0.005-0.20; (ii) mixing silica sol, an organic template agent and phosphate in proportion to obtain an adhesive; and (iii) mixing the adhesive with the titanium silicalite raw powder, and carrying out spray-drying molding and firing to obtain the titanium silicalite catalyst.

A catalyst structure includes a carrier having a porous structure composed of a zeolite type compound and at least one catalytic material existing in the carrier. The carrier has channels communicating with each other, and the catalytic material is a metal fine particle and exists at least in the channel of the carrier.

A catalyst structure includes a carrier having a porous structure composed of a zeolite type compound and at least one catalytic material existing in the carrier. The carrier has channels communicating with each other, and the catalytic material is a metal fine particle and exists at least in the channel of the carrier.

An alkali metal ion modified titanium silicalite zeolite for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes, at first step: preparing an alkali metal hydroxide modification solution; at second step: conducting controlled hydrothermal treatment on a TS-1 zeolite matrix by using an alkali metal hydroxide solution; and at third step: conducting post-treatment on the hydrothermally modified TS-1 zeolite, including solid-liquid separation, washing, drying and calcining. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite; and an infrared characteristic absorption band of a framework titanium active center modified by the alkali metal ions is in a range above 960 cm.sup.?1 and below 980 cm.sup.?1.

An alkali metal ion modified titanium silicalite zeolite for gas phase epoxidation of propylene and hydrogen peroxide and a preparation method thereof. The method includes, at first step: preparing an alkali metal hydroxide modification solution; at second step: conducting controlled hydrothermal treatment on a TS-1 zeolite matrix by using an alkali metal hydroxide solution; and at third step: conducting post-treatment on the hydrothermally modified TS-1 zeolite, including solid-liquid separation, washing, drying and calcining. In the washing process, the modified TS-1 zeolite wet material is washed with a low concentration alkali metal hydroxide solution; alkali metal ions are reserved on the silicon hydroxyl of the modified titanium silicalite zeolite; and an infrared characteristic absorption band of a framework titanium active center modified by the alkali metal ions is in a range above 960 cm.sup.?1 and below 980 cm.sup.?1.

A method is provided for synthesizing molecular sieves of ITE framework type using one or more of 1-ethyl-1,3,5-trimethylpiperidinium cations and 1-ethyl-1-methyldecahydroquinolinium cations a structure directing agent.

The present invention relates to catalyst comprising one or more metal oxides and/or metalloid oxides and a zeolitic material having the CHA framework structure comprising YO.sub.2 and X.sub.2O.sub.3, wherein Y is a tetravalent element and X is a trivalent element, wherein the zeolitic material comprises one or more alkaline earth metals selected from the group consisting of Mg, Ca, Sr, Ba, and combinations of two or more thereof, and wherein the framework of the zeolitic material comprised in the catalyst contains substantially no phosphorous, as well as to a process for the preparation of a catalyst comprising one or more alkaline earth metals selected from the group consisting of Mg, Ca, Sr, Ba, and combinations of two or more thereof and to a catalyst obtainable therefrom. Furthermore, the present invention relates to a method for the conversion of oxygenates to olefins employing the inventive catalyst, as well as to the use of the inventive catalyst in specific applications.