Document VjgrgKx5jK1JdRq5nY5rVREmq

FILE NAME: Chemical Abstracts (CHAB) DATE: 1932 DOC#: CHAB008 DOCUMENT DESCRIPTION: Abstract Originally Published in 1932 by Stewart W ' 2' 1 6074 Chemical Abstracts Vol. 26 commercial prepn. of MgSO by evapn., crystn. and centrifuging of solns. left after extn. of K and Mg sulfates from langbeinite in Stebnik. This process looks promising from the commercial point of view. A brief survey of the deposits of Mg in Little Poland is given. A. C. Zachlin Potash. J. W. T urrentine. Mineral Ind. 40, 445-57(1931).--The world's in dustry is reviewed. A. Butts Preparation of monosodium cyanamide and cyanamide from disodium cyanamide. Otto Libbknecht. Angew. Chem. 45, 584-5(1932).--Anhyd. NaHCN, is prepd. by adding abs. EtOH soln. of HjCNj to an abs. EtOH soln. of EtONa (J. prakt. Chem. [2], 11, 311(1875)). If NajCNi is extd. from the product obtained from coal, NHj and Na, or from. NaNHj and NaCN, hydrolysis forms NaHCNi.2HjO (Traube, et al., C. A. 21, 898). Anhyd. NaHCNj can be made by the reaction NatCNj + EtOH (abs.) = Na HCNj + EtONa. Small amts, of NaCN appear in the EtONa. Free H,CNi can be prepd. by the reaction NaHCNj + HC1 (in EtjO) = NaCl + HjCNj (in EtjO). A valuable by-product is the EtONa. E. M. Symmbs The determination of sulfur dioxide in sulfuric acid plants. Arthur Grounds. Ind. Chemist 8, 189-90(1932).--Methods for use in plant control are reviewed, including Raschig's modification of the Reich test (cf. C. A. 3, 2352). A further modification of this method is given. The app. is quite compact and a detn. can be run in about a min. A table for ealeg. results is given. M. G. Moore An improved method for the purification of spectroscopic carbon. G. H eyne. Angew. Chem. 45, 612(1932).--Comparative results are reported for old and new meth ods. C treated with CIj gas at 2000 or with a N,-CC1, mixt. at 2000 is superior to that treated with a Nj-Hj mixt. at 2800-3000. B. Ti and V are volatilized by the new methods. The time of exposure to high temp, increases with the thickness of the C. Siemens-Plania C, diam. 5 mm., length 250 mm., is to be held at 2000 for 15 min. in a C tube, or moved through the hottest zone at the rate of 5 cm. in 10 min. K. K. Hydrogenation in practice and theory and the manufacture of hydrogen. E. F. Armstrong. Trans. Inst. Chem. Engrs. (London) 9 , 139-57(1931); cf. C. A. 2 6 ,1814.-- An address dealing with the theory and practice of the properties and prepn. of the catalyst and the economic production of pure H. A. Papinbau-Couture The catalysis of the Deacon process. A. E. K orvezee. Tec. trav. chim. 51,815-34 (1932).--The stability of different compds. of Cu in the presence of mixts. of the gases HC1, H,0, Cl and O was studied. Catalysis in the Deacon process is considered an example of chem. catalysis with the formation of intermediate compds. because of the stabilities of intermediate compds. formed when CuClj is the catalyst, and the chem. similarity of the substances which catalyze the reaction. L. E. Steiner Barium and strontium. Charles Hardy. Mineral Ind. 40, 63-7(1931).--An account of sources, uses and production. A. Butts Arsenic. Paul M. T yler. Mineral Ind. 40, 41-7(1931).--A discussion of properties and uses, output and consumption, imports, exports, etc. A. Butts Antimony. K. C. Li. Mineral Ind. 40, 34-40(1931).--A statistical account of production and consumption. A. Butts Sulfur, pyrite and sulfuric acid. A. E. Wells._ Mineral Ind. 40, 509-19(1931).-- World production and trade are reviewed, with statistics. A. Butts Minor nonmetals. Anon. Mineral Ind. 40, 604-12(1931).--A review of market and production, including Br, cryolite, feldspar (by Arthur S. Watts), fuller's earth (by H erman Gunter), I and monazite. A. Butts The occurrence of clumps of asbestosis bodies in the sputum of asbestos workers. M. J. Stewart, N. T attbrsall and A. C. H addow. J. Path. Bad. 3 5 ,737-44(1932).-- Asbestosis bodies are common in the sputum of asbestos workers. Large clumps indi cate lung disintegration. Clumps are not often found. J ohn T. M yers Asbestos. Oliver Bowles. Mineral Ind. 40, 48-56(1931).--Varieties and grades, world production, imports and exports are treated, with a bibliography. A. Butts Diatomite. V. L. E ardlby-Wilmot. Mineral Ind. 40, 173-9(1931).--Properties, uses and world sources are discussed. A. B urrs Fluorspar. Anon. Mineral Ind. 40, 180-4(1931).--A review of the industry, with statistics. A. Butts Graphite. Benjamin L. M iller. Mineral Ind. 40, 258-64(1931).--A review of the world's industry, including production, prices and trade. A. Butts Gypsum. W. M. Myers. Mineral Ind. 40, 265-8(1931).--World output and trade are discussed and statistics given. A. Butts Leucite as a source of alumina, potash and silica. G ian A. Blanc. Trans. Inst.