Preparation of elemental copper
Preparation of elemental copper from copper oxide and charcoal
Copper is prepared by reduction copper oxide with charcoal, hydrogen, etc.
Eighteen grams of copper oxide and 3 g of charcoal are used and heated over a Meker burner in a large covered crucible for about one-half hour. The red-brown powder (which is tinged with black if reduction has been incomplete), is stirred repeatedly with water to float off any carbon and then warmed, adding several 50 ml portions of 3M hydrochloric acid until all the excess oxide has dissolved, leaving the orange-brown elemental copper. Yield 12-14 g.
Inorganic laboratory preparations, by G. G. Schlessinger, 4-5, 1962
Preparation of copper powder from copper sulfate and zinc
100 grams of pure copper sulfate pentahydrate are dissolved in 350 ml of hot water in a 1-litre beaker. After cooling the solution to the room temperature, 35 grams (or more, if necessary) of high grade zinc powder are gradually added, with constant stirring, until the solution is decolorized. The precipitated copper is washed by decantation with water and treated with 5% hydrochloric acid in order to remove the excess of zinc. The stirring is continued until the evolution of hydrogen ceases. The copper powder is filtered, washed with water, and kept in a moist condition (as a paste) in a stoppered bottle.
A text book of practical organic chemistry, by A. I. Vogel, 192, 1974
Preparation of copper powder for diazotization reactions
For the preparation of the copper powder, zinc dust is sifted through a fairly fine sieve into a cold saturated solution of copper sulfate until the latter is decolorized. The liquid is then poured off from the precipitated copper and the copper washed twice with distilled water. It is then shaken up with dilute hydrochloric acid to remove excess of zinc dust, and when no more hydrogen is evolved the acid liquors are poured off and the residue washed with distilled water. The copper powder obtained by such method is very readily oxidized by the air and is best preserved as a paste in well-stoppered bottles.
Preparation of organic compounds, E. de. Barry Barnett, 75, 1912
COPPER, cuprum, 7440-50-8, cobre, cuivre, Kupfer, Arwood copper, Blister copper, Bronze powder, Cathode copper, Copper bronze, Copper powder, Copper-airborne, Copper-milled, Rame, Anode copper, Copper dust, Gold bronze, Kafar copper, Raney copper, Copper, fume, Pigment metal 2, Copper, elemental, Cuprum [Latin], Copper precipitates, Copper slag-milled, (60cu)copper, (67cu)copper, Copper metal powder, copper(0), Copper slag-airborne, CDX (metal), Copper M 1, CI Pigment metal 2, Allbri Natural Copper, OFHC Cu, M1 (Copper), M2 (Copper), M3 (Copper), M4 (Copper), Caswell No. 227, CE 7 (metal), Copper, metallic powder, Copper, dusts and mists, Cutox 6010, Cutox 6030, C.I. Pigment Metal 2, C 100 (metal), E 115 (metal), 1721 Gold, 29Cu, Copper fulleride (CuC20), CU M3, ANAC 110, CCRIS 1577, CHEBI:28694, HSDB 1622, CDA 101, CDA 102, CDA 110, CDA 122, Electrolytic refinery billet copper, UNII-789U1901C5, Electrolytic refinery wirebar copper, EINECS 231-159-6, EPA Pesticide Chemical Code 022501, CE 1110, CU, Copper (S, P), CI 77400, C.I. 77400, Microheterogeneitycopper (Ii) Ion, Electrolytic tough pitch copper (O), M3R, Copper turnings, Copper sponge, Tatum-T, Raney(R)-Copper, Paragard t380a, Copper (O), Paragard T 380a, copper(3+), 13982-06-4, 15128-03-7, Copper (0), ACMC-1BKZD, IRMM522A_FLUKA, IRMM522B_FLUKA, IRMM522C_FLUKA, IRMM522D_FLUKA, BCR017A_FLUKA, BCR017B_FLUKA, BCR022A_FLUKA, BCR022B_FLUKA, BCR054R_FLUKA, BCR074A_FLUKA, BCR058_FLUKA, Copper nanopowder, <50nm, Cu-7, Epitope ID:114074, AC1L2N4I, Continuous cast copper (O), KSC178C4R, 12806_ALDRICH, 12809_ALDRICH, 12816_ALDRICH, 31284_ALDRICH, 61139_ALDRICH, Cu(0), 12806_RIEDEL, 12809_RIEDEL, 12816_RIEDEL, 203122_ALDRICH, 207780_ALDRICH, 223409_ALDRICH, 254177_ALDRICH, 266086_ALDRICH, 266744_ALDRICH, 292583_ALDRICH, 31284_RIEDEL, 326410_ALDRICH, 326429_ALDRICH, 326445_ALDRICH, 326453_ALDRICH, 326488_ALDRICH, 349151_ALDRICH, 349178_ALDRICH, 349208_ALDRICH, 349216_ALDRICH, 349224_ALDRICH, 357456_ALDRICH, 365327_ALDRICH, 510076_ALDRICH, 518905_ALDRICH, 520381_ALDRICH, 634220_ALDRICH, 684007_ALDRICH, 61154_FLUKA, CHEBI:29037, CHEBI:30052, CTK0H8148, MolPort-001-783-710, RYGMFSIKBFXOCR-UHFFFAOYSA-N, 61139_SIAL, KST-1A1345, KST-1A1813, LTBB002481, 292583_SIAL, 311405_SIAL, Electrolytic copper (trace elements), RANEY COPPER OR BANEY COPPER, AR-1A6738, AR-1A6741, Cu(I)-S-Mo(Iv)(o)o-Nbic Cluster, AKOS015902737, LS-2178, RP18267, RTR-024050, NCGC00184571-01, BP-20130, Copper, small rods for elemental analysis, TR-024050, 789U1901C5, FT-0623273, X1068, C00070, 3B4-2138, I14-19615, 133353-46-5, 133353-47-6, 195161-80-9, 65555-90-0, 72480-60-5, 72514-83-1, 90294-97-6, 99148-46-6, Copper,diazotized3-amino-4-methoxybenzenesulfonicacid-diazotized4-nitro-1,3-benzenediamine-resorcinolcouplingproductsammoniumsodiumcomplexes, Copper,diazotized4-amino-3-hydroxy-7-nitro-1-naphthalenesulfonicacid-diazotizedo-toluidine-resorcinolcouplingproductscomplexes, Copper,diazotized5-amino-1-naphthalenesulfonicacid-diazotized2-[ amino]-5-nitrobenzenesulfonicacid-diazotized4-nitrobenzeneamine-Dyer’smulberryextractcouplingproductscomplexes, CUB
Copper (II) ion, Cu(II), COPPER (I) ION, Cu2+, Copper, isotope of mass 64, CID23978, D003300, 14120-29-7, 1602-42-2, M3S, Cu+, CU1, CUN