In some embodiments the application pertains to processes comprising reacting a component comprising an alkaline earth weak acid with a component comprising an acid to form a component comprising an alkaline earth acid anion and a component comprising a weak acid derivative. At least a portion of the component comprising the alkaline earth acid anion is reacted with a component comprising an alkali sulfate to form a component comprising alkaline earth sulfate and a component comprising an alkali acid anion. At least a portion of the component comprising alkaline earth sulfate is decomposed to form a component comprising alkaline earth oxide, or alkaline earth hydroxide, or alkaline earth carbonate, or alkaline earth sulfide, or a derivative thereof, or any combination thereof, and a component comprising sulfur dioxide, or oxygen, or sulfur trioxide, or a derivative thereof, or any combination thereof.

In some embodiments the application pertains to processes comprising reacting a component comprising an alkaline earth weak acid with a component comprising an acid to form a component comprising an alkaline earth acid anion and a component comprising a weak acid derivative. At least a portion of the component comprising the alkaline earth acid anion is reacted with a component comprising an alkali sulfate to form a component comprising alkaline earth sulfate and a component comprising an alkali acid anion. At least a portion of the component comprising alkaline earth sulfate is decomposed to form a component comprising alkaline earth oxide, or alkaline earth hydroxide, or alkaline earth carbonate, or alkaline earth sulfide, or a derivative thereof, or any combination thereof, and a component comprising sulfur dioxide, or oxygen, or sulfur trioxide, or a derivative thereof, or any combination thereof.

The present invention relates to a method for producing a molding catalyst for obtaining chlorine (Cl.sub.2) through an oxidation reaction of hydrogen chloride (HCl), and more specifically, to a method for producing an oxidation reaction molding catalyst by adding heterogeneous material to a ruthenium oxide (RuO.sub.2)-supported catalyst having titanium oxide (TiO.sub.2) as a supporting body, and molding so as to be usable in a fixed bed reactor to produce chlorine (Cl.sub.2) from hydrogen chloride (HCl).

The present invention relates to a method for producing a molding catalyst for obtaining chlorine (Cl.sub.2) through an oxidation reaction of hydrogen chloride (HCl), and more specifically, to a method for producing an oxidation reaction molding catalyst by adding heterogeneous material to a ruthenium oxide (RuO.sub.2)-supported catalyst having titanium oxide (TiO.sub.2) as a supporting body, and molding so as to be usable in a fixed bed reactor to produce chlorine (Cl.sub.2) from hydrogen chloride (HCl).

The invention relates to a process for preparation of chlorine from hydrogen chloride comprising circulating a liquid melt comprising copper ions Cu.sup.n+ with n being a number in the range from 1 to 2, alkali cations and chloride ions Cl in a reactor system comprising three bubble lift reactors I, II and III, each comprising a reaction zone i, ii and iii respectively, wherein: (a) in the reaction zone i of the first bubble lift reactor I, a liquid melt comprising copper ions Cu.sup.n+, alkali cations and chloride ions Cl is contacted with oxygen at a temperature in the range from 395 to 405 C. so that the molar ratio Cu.sup.n+:Cu.sup.+ in the liquid melt increases, obtaining a liquid melt having an increased molar ratio Cu.sup.n+:Cu.sup.+ (b) the liquid melt obtained in (a) is circulated to the reaction zone ii in the second bubble lift reactor II, where the liquid melt is contacted with hydrogen chloride at a temperature in the range from 395 to 405 C. so that water is formed, obtaining a liquid melt being enriched in chloride anions (CI) compared to the liquid melt obtained according to (a); (c) circulating the liquid melt obtained in (b) to the reaction zone iii in the third bubble lift reactor III, which is operated at a temperature in the range from 420 to 430 C. so that chlorine (Cl.sub.2) is formed, wherein Cl.sub.2 is removed from the reaction zone iii and the third bubble lift reactor III respectively in gaseous form, leaving a liquid melt depleted of Cl-compared to the liquid melt obtained according to (b). The invention further relates to a reactor system comprising three bubble lift reactors I, II and III.

The invention relates to a process for preparation of chlorine from hydrogen chloride comprising circulating a liquid melt comprising copper ions Cu.sup.n+ with n being a number in the range from 1 to 2, alkali cations and chloride ions Cl in a reactor system comprising three bubble lift reactors I, II and III, each comprising a reaction zone i, ii and iii respectively, wherein: (a) in the reaction zone i of the first bubble lift reactor I, a liquid melt comprising copper ions Cu.sup.n+, alkali cations and chloride ions Cl is contacted with oxygen at a temperature in the range from 395 to 405 C. so that the molar ratio Cu.sup.n+:Cu.sup.+ in the liquid melt increases, obtaining a liquid melt having an increased molar ratio Cu.sup.n+:Cu.sup.+ (b) the liquid melt obtained in (a) is circulated to the reaction zone ii in the second bubble lift reactor II, where the liquid melt is contacted with hydrogen chloride at a temperature in the range from 395 to 405 C. so that water is formed, obtaining a liquid melt being enriched in chloride anions (CI) compared to the liquid melt obtained according to (a); (c) circulating the liquid melt obtained in (b) to the reaction zone iii in the third bubble lift reactor III, which is operated at a temperature in the range from 420 to 430 C. so that chlorine (Cl.sub.2) is formed, wherein Cl.sub.2 is removed from the reaction zone iii and the third bubble lift reactor III respectively in gaseous form, leaving a liquid melt depleted of Cl-compared to the liquid melt obtained according to (b). The invention further relates to a reactor system comprising three bubble lift reactors I, II and III.