Preparation of hydrogen sulfide
Two parts of paraffin wax and one part of sulfur are mixed and heated above 160° C. During the reaction hydrogen sulfide is produced. The speed of reaction is proportional to the temperature. The reaction is fast and efficient. The reaction mixture should not be heated over 200° C, because a lot of paraffin vapor clogs the pipes. Furthermore, the connection of the apparatus should not be very tight. The obtained crude hydrogen sulfide is washed with water in order to remove paraffin mist.
Hydrogen sulfide is usually evolved from iron sulfide, which is broken into small lumps and then treated with dilute sulfuric or hydrochloric acid. The iron sulfide is placed in a Kipp’s apparatus and the hydrogen sulfide gas is generated by the action of dilute sulfuric or hydrochloric acids.
Iron sulfide may be very simply prepared by mixing of 30 g of iron filings and 21 g of flowers of sulfur in small portions into a red-hot crucible. It is important to add the mixture gradually in small portions. Then the crucible is covered and exposed to more intense heat, sufficient to make the iron sulfide fuse. When the reaction is complete the crucible to cooled and the sulfide is broken in small pieces.
Preparation of hydrogen sulfide free from arsenic
If iron sulfide is used in a form of mineral called pyrite it could contain some impurities of arsenic. For the preparation of arsenic free hydrogen sulfide following procedure is used. Calcium sulfide (prepared by igniting a mixture of pure calcium sulfate CaSO4 . 1/2H2O and coal) yields the pure gas when treated with dilute hydrochloric acid.
To evolve the gas in a regular stream, a mixture of calcium sulfide, with 1/4 of its weight of calcium sulfate (gypsum) and enough water to make a cream, is poured into shallow paper trays. As soon as it has set, the cake is cut up into blocks, which are dried at a gentle heat. They may be used in Kipp’s apparatus or other glass apparatus for generating gas.
Another method is to use barium sulfate mixed with 25%, of ground coal and 20 per cent, of common salt. The dampened mixture is rammed into a clay crucible, which, after drying and closing with a luted cover, is heated for several hours at an incipient white heat. The product is in hard compact masses which dissolve completely in dilute hydrochloric acid with a steady evolution of hydrogen sulfide.
Instead of using an inorganic acid for the evolution of hydrogen sulfide, it is convenient to use sodium hydrogen sulfate (NaHSO4). A mixture of equivalent quantities of the respective salts in powder gives, when wetted with water, a regular stream of the hydrogen sulfide gas, which will be free from the impurities usually derived from the use of an acid.
Laboratory manual of inorganic preparations, by H. T. Vulte, 25-27, 1895
Hydrogen Sulfide, Hydrogen Sulfide (H2(Sx)), Hydrogen Sulfide (H2S2), Hydrogen Sulfide (H2S3), Sulfide, Hydrogen
hydrogen sulfide, sulfur, Hydrosulfuric acid, sulfane, Dihydrogen monosulfide, Dihydrogen sulfide, Stink DAMP, Sulfureted hydrogen, Sulphur, Sulfur hydride, Sewer gas, Hydrogen sulphide, Sulfur atom, Hydrogene sulfure, Sulfur, sublimed, Acide sulfhydrique, Schwefelwasserstoff, Hydrogen sulfide (H2S), Sulfur, precipitated, Micowetsulf, Microflotox, Netzschwefel, Siarkowodor, Zwavelwaterstof, Bensulfoid, Brimstone, Crystex, Hexasul, Kolofog, Kolospray, Kumulus, Spersul, Sulfidal, Sulforon, Sulikol, Thiolux, Thiovit, Colsul, Elosal, Sofril, Sufran, Sulfex, Sulkol, Sulsol, Sultaf, Cosan, Spersul thiovit, Sublimed sulfur, Sulfur ointment, Svovl, Atomic sulfur, Flour sulfur, Hepatic acid, Polsulkol Extra, Sulfur vapor, Super cosan, Asulfa-Supra, Colloidal sulfur, Hydrogen-sulfide, Ultra Sulfur, Colloidal-S, Sulfur, rhombic, Sulfur, solid, Sperlox-S, Sufran D, Flowers of sulfur, Idrogeno solforato, Corosul D and S, Precipitated sulfur, Sulfur, monoclinic, RC-Schwefel Extra, Ground vocle sulfur, Hydrogen monosulfide, Kolloidschwefel 95, Sulfur, homopolymer, Sulfuretted hydrogen, 7704-34-9, Cosan 80, Sulfur, pharmaceutical, soufre, Devisulphur, Microthiol, Aquilite, Collokit, Gofrativ, Kristex, Liquamat, Shreesul, Sulfospor, Tesuloid, Thiozol, Transact, Wettasul, Sastid, Zolvis, Suffa, TechneColl, Thion, Flour sulphur, elemental sulfur, Hepatic gas, Sublimed sulphur, Sulfur hydroxide, Kolo 100, Sulfur Soap, Super Six, Thiovit S, Agri-Sul, Kumulus FL, Magnetic 6, Sulfur (molten), Hydrogene sulphure, RCRA waste number U135, 7783-06-4, Acide sulphhydrique, Flowers of sulphur, Sulphur [ISO], Ground vocle sulphur, Siarkowodor [Polish], H2S, Hydrogen sulfide H2S, Hydrogen sulfuric acid, Caswell No. 812, Soufre [ISO-French], AN-Sulfur Colloid Kit, Schwefel, feinverteilter, Zwavelwaterstof [Dutch], UNII-YY9FVM7NSN, Sulfur, sublimed [USP], Hydrogen sulfure [French], RCRA waste no. U135, Hydrogene sulfure [French], Acide sulfhydrique [French], UN 1053, Schwefelwasserstoff [German], Sulfur, precipitated [USP], Idrogeno solforato [Italian], FEMA No. 3779, HSDB 576, CHEBI:16136, CHEBI:26833, HSDB 5166, Magnetic 70, 90, and 95, RWSOTUBLDIXVET-UHFFFAOYSA-N, EINECS 231-722-6, EINECS 231-977-3, NA1350, NA2448, UN1053, UN1350, UN2448, EPA Pesticide Chemical Code 077501, NSC 403664, Sulphur, precipitated, sublimed or colloidal, Sulfur, sublimed (USP), Sulfur, precipitated (USP), 9035-99-8, 63705-05-5, azufre, dihydridosulfur, sulfanylidene, theion, Hydrosulfurate, Hepatate, Proactiv, Schwefel, Hydrogen sulfure, Sour gas, Sulfur, molten, Sulfur, elemental, Bensulfoid (TN), Sulfurated hydrogen, dihydrogen(sulfide), sulfure d’hydrogene, 1-Methyl-2-(2-[2-thienyl]ethenyl)-1,4,5,6-tetrahydropyrimidine compound with 4,4′-methylenebis(3-hydroxy-2-naphthoic acid), Sastid (TN), sulfur (0), 15117-53-0, AC1NSFZP, component of Bensulfoid, Sour gas (Salt/Mix), Sulfur (JP16), YY9FVM7NSN, AC1Q7DQL, Technescan Sulfur Colloid, Magnetic 70, and 95, P6210_SIGMA, P7420_SIGMA, 13803_RIEDEL, 13825_RIEDEL, 213292_ALDRICH, 295442_ALDRICH, 344621_ALDRICH, 36576_RIEDEL, 414980_ALDRICH, 451924_ALDRICH, 46702_RIEDEL, AC1L195M, CHEMBL1200739, CHEMBL2105487, 36576_FLUKA, 46702_FLUKA, 84683_FLUKA, 84742_FLUKA, CTK1B5753, HMDB03276, MolPort-001-786-695, NINIDFKCEFEMDL-UHFFFAOYSA-N, Technetium Tc 99m sulfur colloid, [SH2], 13803_SIAL, 13825_SIAL, 84683_SIAL, LTBB002945, SULFUR, 99.999%, Sulfur [NA1350] [Class 9], 215198_SIAL, 215236_SIAL, Sulfur [NA1350] [Class 9], AR-1L5734, NSC403664, AKOS015833648, AKOS015950634, Sulfur [UN1350] [Flammable solid], NSC-403664, Sulfur [UN1350] [Flammable solid], Sulfur, molten [NA2448] [Class 9], AN-21238, AN-21829, BP-21056, LS-77259, LS-77260, Sulfur, molten [NA2448] [Class 9], Hydrogen sulfide [UN1053] [Poison gas], AB1002328, Hydrogen sulfide [UN1053] [Poison gas], LS-148157, RT-000090, FT-0636982, FT-0653443, Sulfur, molten [UN2448] [Flammable solid], C00087, C00283, D00024, Sulfur, molten [UN2448] [Flammable solid], 3B4-1637, 3B4-5091, Sulfur, colloidal, metastable technetium-99 labeled, 13465-07-1 (H2S2), F5FD384D-E823-4920-B313-6476A1F3F0C5, 11144-15-3, 12673-82-4, 12684-31-0, 12767-24-7, 37331-50-3, 56449-52-6, 56591-09-4, 56645-30-8, 57035-13-9, 7782-45-8, 8050-82-6, 81032-32-8, 97124-07-7
Sulforcin, Sulfoxyl, Acnomel, Fostril, Rezamid, Sebulex, Pernox, Solfa, glutathione, null, Hydrogensulfide, Octathiocane, Acunol, Thiocyanate ion, pyrantel pamoate, Sulfate ion, Unknown Ligand, Mixture Name, SULFIDE, Sulfide, Hydrogen, Dihydrogen disulfide, Beta-Mercaptoethanol, Sulfur-32S, Hydrogen sulfide (H2S2), Salicylic acid & Sulfur Soap, Hydrogen Sulfide (H2S3), UNII-70FD1KFU70, Sulfur, isotope of mass 32, Hydrogen Sulfide (H2(Sx)), CID402, c0239, 4-DEOXY-4-THIO-BETA-D-GLUCOPYRANOSE, D006862, D013455, 14120-20-8, 16S, BME, GSH, PS9, SCN, SGC, SO4, SX, UNK, UNL