| 摘要 |
A gas mixture containing hydrogen sulphide is contacted with an aqueous alkaline solution to form bisulphide and thereby remove the hydrogen sulphide from the solution. The bisulphide reacted with a soluble vanadium (V) compound to form sulphur. The vanadium is subsequently reoxidised. The soluble vanadium compound is Na<u3>uVO<u4>u . 1/4NaOH.12H<u2>uO. It is prepared by adding sodium hydroxide to an aqueous solution containing vanadium (V) at elevated temperature, and then cooling the mixture. The amount of sodium hydroxide added is sufficient to increase the mole ratio of Na to V in the solution (preferably from at least 2:1) to at least 3:1 (and preferably to at least 6:1). |
