摘要:
Processes comprising: providing a crude gas stream having a temperature not exceeding 40° C., the crude gas stream comprising hydrogen chloride and at least one organic impurity; condensing at least a portion of the at least one organic impurity from the crude gas stream at a temperature not exceeding 0° C. to form a prepurified gas stream and a condensate comprising condensed organic impurity; subjecting at least a portion of the prepurified gas stream to adsorption on an adsorption medium to provide a purified gas stream; and separating the condensate into at least a head gas stream comprising residual hydrogen chloride and a sump stream comprising at least a portion of the condensed organic impurity.
摘要:
PROBLEM TO BE SOLVED: To provide a method for producing carried ruthenium oxide excelling in thermal stability and catalyst life, and a method for producing chlorine stably for many hours using the carried ruthenium oxide obtained by the method.SOLUTION: A method for producing carried ruthenium oxide obtained by supporting ruthenium oxide on a titanium carrier includes carrying out contact treatment of the titanium carrier in a solution containing a ruthenium compound and a solvent, and then drying the titanium carrier until the content of the solvent reaches 0.10-15 wt.% based on the weight of the titanium carrier; and holding an obtained dry product in a state of containing 1.0-15 wt% solvent based on the weight of the titanium carrier, and then baking the dried product in an oxidizing gas atmosphere. The carried ruthenium oxide produced by this method is used as a catalyst, and hydrogen chloride is oxidized with oxygen in the presence of this catalyst to produce chlorine.
摘要:
PROBLEM TO BE SOLVED: To provide a method for producing a supported ruthenium oxide comprising making a titania carrier efficiently support ruthenium oxide and silica, the supported ruthenium oxide having excellent thermal stability and catalyst lifetime; and to provide a method for stably producing chlorine over a long time using the supported ruthenium oxide obtained by the above method.SOLUTION: A method for producing a supported ruthenium oxide formed by supporting ruthenium oxide and silica on a titania carrier includes: contact-treating the titania carrier with a solution including an alkoxysilane compound and water; performing a first calcination under an oxidizing gas atmosphere; and performing a second calcination under the oxidizing gas atmosphere after contact treatment with a ruthenium compound. Using the supported ruthenium oxide produced by the above method as a catalyst, chlorine is produced by oxidizing hydrogen chloride with oxygen in the presence of the catalyst.
摘要:
Disclosed is a process for producing chlorine, which makes it possible to successfully continue an oxidation reaction, even if sulfur component-containing hydrogen chloride is used. This process comprises a step of feeding sulfur component-containing hydrogen chloride and oxygen into a reaction tube 1 comprising a catalyst packed bed 10, to thereby oxidize the hydrogen chloride to produce chlorine, wherein the catalyst packed bed 10 includes an alumina-mixed catalyst packed bed 20 formed of a mixture of a catalyst 3 with alumina (or a diluent 4), and wherein the BET specific surface area of the alumina is from 10 to 500 m 2 /g. Preferably, the alumina is ³-alumina and/or ¸-alumina.