| 摘要 |
1,126,215. Mercuric sulphide; sulphur. SOC. INDUSTRIALE CATANESE S.p.A. 15 Oct., 1965 [20 Oct., 1964], No. 43859/65. Heading C1A. A composition for the purification of gases contaminated with mercury comprises either mercuric sulphide and sulphur supported on a carrier which is inert to the purification reaction, e.g. activated carbon or alumina or crystalline sulphur partially coated with the mercuric sulphide. A composition containing mercuric sulphide and sulphur may be used for the purification of gases contaminated with mercury by contacting the gases with the composition, preferably at space velocities of 10,000, 3000-4000 or 8000 volumes of gas per volume of composition per hour. The composition may contain 60-80 mg. of HgS and from 5-10 mg. of sulphur per gram of carrier. The composition may be prepared either by soaking crystalline sulphur in aqueous mercuric chloride solution and treating with a gas containing excess hydrogen sulphide, over that required to convert the mercuric chloride to sulphide, or by soaking an activated carbon or alumina carrier in aqueous mercuric chloride solution and treating with a gas containing excess hydrogen sulphide and oxygen. The composition is regenerated after absorption of mercury by treatment with a gas containing hydrogen sulphide, in an amount over that required to convert the mercuric chloride to sulphide, and oxygen. Examples show the removal of contaminating mercury from hydrogen and nitrogen. |
