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Origin of the metal in meteorites
71o
CURRENT TOPICS.
[J. F. I.
Separation of Aluminium and Beryllium. I . M . KOLTHOFFand ERNEST B. SANDELL of the University of Minnesota (Jour. Am. Chem. Soc., I928, 50, I9OO-I9O4) recommend the use of ortho hydroxyquinoline for the separation of aluminium and beryllium. A 5 per cent. solution of the reagent is prepared, using double normal acetic acid as the solvent. The solution of aluminium and beryllium should be only slightly acid; it is warmed to a temperature of 5°o to 60 ° C.; an excess of the solution of ortho hydroxyquinoline (also called oxine) is added; then double normal ammonium acetate solution is slowly added until a permanent precipitate forms and a large excess of this reagent is present. The aluminium is precipitated as its salt of ortho hydroxyquinoline, which has the formula AI(C~H6ON)~ and contains II.IO per cent. of alumina, A12Oa, when dried at 12o° to I4 o° C. Beryllium remains in solution. The beryllium may be precipitated in the filtrate from the aluminium by means of ammonia after heating almost to boiling. J. S. H. Acetic Acid as a Solvent. ARTHUR W. DAVIDSON of the University of Kansas (Jour. Am. Chem. Soc., I928, 50, I89O-I895) finds that many salts, especially halides and nitrates, are soluble in pure acetic acid, while sulphates are very slightly soluble in that solvent. Reactions involving double decomposition occur quite readily in acetic acid solutions, but soIvolysis does not take place to any marked extent. J.S.H.
Origin of the Metal in Meteorites. GEORGE P. MERRILL (Proc. U. S. Nat. Museum, i928, 73, Article 2I, I-7) has evolved a theory concerning the origin of the metal in meteorites. Meteorites are volcanic products. They contain lawrencite or ferrous chloride. When first formed, large quantities of chlorides are present. The heated atmosphere of hydrogen or other reducing gas at the fountain source of the meteorite reduces chlorides to the metallic state. J.S.H. Occurrence of Carotin in Honey. H . A . SCHUETTEand PHYLLIS A. BOTT of the University of Wisconsin (Jour. Am. Chem. Soc., I928, 50, 1998-2ooo) have isolated at least one of the pigments of buckwheat honey by means of petroleum ether in the presence of ethyl alcohol and calcium sulphate, and have identified it as carotin. J.S.H.
CURRENT TOPICS.
[J. F. I.
Separation of Aluminium and Beryllium. I . M . KOLTHOFFand ERNEST B. SANDELL of the University of Minnesota (Jour. Am. Chem. Soc., I928, 50, I9OO-I9O4) recommend the use of ortho hydroxyquinoline for the separation of aluminium and beryllium. A 5 per cent. solution of the reagent is prepared, using double normal acetic acid as the solvent. The solution of aluminium and beryllium should be only slightly acid; it is warmed to a temperature of 5°o to 60 ° C.; an excess of the solution of ortho hydroxyquinoline (also called oxine) is added; then double normal ammonium acetate solution is slowly added until a permanent precipitate forms and a large excess of this reagent is present. The aluminium is precipitated as its salt of ortho hydroxyquinoline, which has the formula AI(C~H6ON)~ and contains II.IO per cent. of alumina, A12Oa, when dried at 12o° to I4 o° C. Beryllium remains in solution. The beryllium may be precipitated in the filtrate from the aluminium by means of ammonia after heating almost to boiling. J. S. H. Acetic Acid as a Solvent. ARTHUR W. DAVIDSON of the University of Kansas (Jour. Am. Chem. Soc., I928, 50, I89O-I895) finds that many salts, especially halides and nitrates, are soluble in pure acetic acid, while sulphates are very slightly soluble in that solvent. Reactions involving double decomposition occur quite readily in acetic acid solutions, but soIvolysis does not take place to any marked extent. J.S.H.
Origin of the Metal in Meteorites. GEORGE P. MERRILL (Proc. U. S. Nat. Museum, i928, 73, Article 2I, I-7) has evolved a theory concerning the origin of the metal in meteorites. Meteorites are volcanic products. They contain lawrencite or ferrous chloride. When first formed, large quantities of chlorides are present. The heated atmosphere of hydrogen or other reducing gas at the fountain source of the meteorite reduces chlorides to the metallic state. J.S.H. Occurrence of Carotin in Honey. H . A . SCHUETTEand PHYLLIS A. BOTT of the University of Wisconsin (Jour. Am. Chem. Soc., I928, 50, 1998-2ooo) have isolated at least one of the pigments of buckwheat honey by means of petroleum ether in the presence of ethyl alcohol and calcium sulphate, and have identified it as carotin. J.S.H.