The present invention relates to a catalyst for producing chlorine by oxidation of hydrogen chloride and a method for preparing the same. The catalyst comprises a support and active ingredients that comprise 1-20 wt % of copper, 0.01-5 wt % of boron, 0.1-10 wt % of alkali metal element(s), 0.1-15 wt % of one or more rare earth elements, and 0-10 wt % of one or more elements selected from magnesium, calcium, barium, manganese, iron, nickel, cobalt, zinc, ruthenium or titanium based on the total weight of the catalyst. The catalyst is prepared by a two-step impregnation method. Comparing with the available catalysts of the same type, the catalyst according to the present invention has greatly improved conversion and stability.

The invention relates to a method for cleaning corrosive process gases that contain sulfur compounds. According to the method, a gas stream that contains corrosive gases is conducted, in a sorption phase, over an inorganic sorbent material which absorbs at least one of the sorbable sulfurous components on the sorbent material, and the sulfurous compound-depleted gas stream is removed.

The present invention relates to a catalyst for the oxidation of hydrogen chloride to chlorine, wherein the catalyst comprises an inorganic carrier matrix and a zeolite, wherein the inorganic carrier matrix comprises Y, O, and optionally comprises X, wherein the zeolite comprises Y and O in its framework structure, and optionally comprises X in its framework structure, wherein Y is a tetravalent element and X is a trivalent element, wherein the inorganic carrier matrix and the zeolite are loaded with copper and with one or more rare earth metals, and wherein the zeolite is supported within the inorganic carrier matrix. Furthermore, the present invention relates to a molding comprising the catalyst, as well as to a process for the production of the catalyst and the molding, respectively, as well as to their respective use in a process for the oxidation of hydrogen chloride to chlorine.

The present invention relates to a catalyst for the oxidation of hydrogen chloride to chlorine, wherein the catalyst comprises an inorganic carrier matrix and a zeolite, wherein the inorganic carrier matrix comprises Y, O, and optionally comprises X, wherein the zeolite comprises Y and O in its framework structure, and optionally comprises X in its framework structure, wherein Y is a tetravalent element and X is a trivalent element, wherein the inorganic carrier matrix and the zeolite are loaded with copper and with one or more rare earth metals, and wherein the zeolite is supported within the inorganic carrier matrix. Furthermore, the present invention relates to a molding comprising the catalyst, as well as to a process for the production of the catalyst and the molding, respectively, as well as to their respective use in a process for the oxidation of hydrogen chloride to chlorine.

A process for regenerating a catalyst containing ruthenium or ruthenium compounds, which includes, optionally at elevated temperature, subjecting the catalyst to a hydrogen halide treatment, particularly a gas stream comprising hydrogen chloride, under non-oxidative conditions and, optionally at reduced temperature, to at least a two-stage oxidative post-treatment. The catalyst may have been poisoned by sulfur compounds. After the removal of sulfur, the catalyst is subjected to an oxidative post-treatment.

The present invention relates to a catalyst for obtaining chlorine (Cl.sub.2) through an oxidation reaction of hydrogen chloride (HCl), and more particularly, to an oxidation reaction catalyst for preparing Cl.sub.2 from HCl by addition of a second heterogeneous material to a RuO.sub.2-supported catalyst using TiO.sub.2 as a support, and a preparation method therefor. According to an embodiment of the present invention, a hydrogen chloride oxidation reaction catalyst for use in a method for preparing chlorine by oxidizing hydrogen chloride includes a support and a heterogeneous material in an active ingredient. The catalyst according to the present invention has both increased catalytic activity at a low temperature and enhanced thermal stability, and thus a catalyst having improved durability such as thermal stability at a high temperature is provided. Therefore, since thermal stability is secured, the performance of the catalyst is maintained for a long time even at a high temperature.

The present invention relates to a catalyst for obtaining chlorine (Cl.sub.2) through an oxidation reaction of hydrogen chloride (HCl), and more particularly, to an oxidation reaction catalyst for preparing Cl.sub.2 from HCl by addition of a second heterogeneous material to a RuO.sub.2-supported catalyst using TiO.sub.2 as a support, and a preparation method therefor. According to an embodiment of the present invention, a hydrogen chloride oxidation reaction catalyst for use in a method for preparing chlorine by oxidizing hydrogen chloride includes a support and a heterogeneous material in an active ingredient. The catalyst according to the present invention has both increased catalytic activity at a low temperature and enhanced thermal stability, and thus a catalyst having improved durability such as thermal stability at a high temperature is provided. Therefore, since thermal stability is secured, the performance of the catalyst is maintained for a long time even at a high temperature.

The present invention relates to a method for manufacturing a ruthenium oxide-supported catalyst for preparing chlorine, and more particularly, to a method for manufacturing a catalyst and a catalyst manufactured thereby, wherein the catalyst includes a ruthenium ingredient of which a support level on an outer surface of a support is significantly improved, and the use of the catalyst in preparing chlorine can provide a high conversion rate of chlorine even at a low reaction temperature. According to an embodiment of the present invention, the method for manufacturing a ruthenium oxide-supported catalyst for preparing chlorine may include the steps of: (a) dissolving a ruthenium compound in an organic solvent to prepare a solution and supporting the same on at least one support selected from titania and alumina; (b) performing drying thereon after the supporting; and (c) performing calcining thereon after the drying. According to an embodiment of the present invention, in particular, it is possible to provide a simplified process by manufacturing a catalyst including ruthenium oxide only at each outer surface layer of a titania support without alkali pretreatment, thereby exhibiting an advantageous effect in terms of scale-up.

The present invention relates to a method for manufacturing a ruthenium oxide-supported catalyst for preparing chlorine, and more particularly, to a method for manufacturing a catalyst and a catalyst manufactured thereby, wherein the catalyst includes a ruthenium ingredient of which a support level on an outer surface of a support is significantly improved, and the use of the catalyst in preparing chlorine can provide a high conversion rate of chlorine even at a low reaction temperature. According to an embodiment of the present invention, the method for manufacturing a ruthenium oxide-supported catalyst for preparing chlorine may include the steps of: (a) dissolving a ruthenium compound in an organic solvent to prepare a solution and supporting the same on at least one support selected from titania and alumina; (b) performing drying thereon after the supporting; and (c) performing calcining thereon after the drying. According to an embodiment of the present invention, in particular, it is possible to provide a simplified process by manufacturing a catalyst including ruthenium oxide only at each outer surface layer of a titania support without alkali pretreatment, thereby exhibiting an advantageous effect in terms of scale-up.

The method for producing chlorine by oxidation of hydrogen chloride with oxygen in the presence of a catalyst in a fixed-bed reactor, wherein [I] a material containing hydrogen chloride and oxygen is allowed to contact a catalyst in a temperature range of 280 to 370° C., and [II] the material containing hydrogen chloride and oxygen has an oxygen concentration of 45 to 75 vol %.