Effects of halide stripping with ferric ions and hydrogen peroxide oxidants for 18K gold alloys

2021 ◽  
Vol 99 (3) ◽  
pp. 121-125
Author(s):  
Ikgyu Kim ◽  
Kwangbae Kim ◽  
Ohsung Song
Keyword(s):  
Hydrogen Peroxide ◽  
Gold Alloys ◽  
Ferric Ions

Reactions of ferrous and ferric ions with hydrogen peroxide. Part II.—The ferric ion reaction

1951 ◽  
Vol 47 (0) ◽  
pp. 591-616 ◽  
Author(s):  
W. G. Barb ◽  
J. H. Baxendale ◽  
P. George ◽  
K. R. Hargrave
Keyword(s):  
Hydrogen Peroxide ◽  
Ferric Ion ◽  
Ferric Ions

Homogeneous oxidation of phenols in aqueous solution with hydrogen peroxide and ferric ions

1997 ◽  
Vol 36 (2-3) ◽  
pp. 151-154 ◽  
Author(s):  
H. Grigoropoulou ◽  
C. Philippopoulos
Keyword(s):  
Hydrogen Peroxide ◽  
Ferrous Sulphate ◽  
Ph Control ◽  
Chemical Oxidation ◽  
Ferric Ions ◽  
Experimental Conditions ◽  
Oxidation Rates ◽  
Homogeneous Oxidation ◽  
Oxidation Of Phenol ◽  
Ferrous Ammonium

The chemical oxidation of phenol and chlorophenols with hydrogen peroxide in the presence of soluble iron can be economically attractive at low oxidant consumption, leading then to intermediates that are more easily biodegradable. The homogeneous oxidation of phenol and chlorophenols in aqueous solutions with hydrogen peroxide is studied at oxidant : phenol ratio of about 4:1 and 16:1 (mol/mol) at various catalyst concentrations, at ambient temperature without pH control. Ferric chloride, ferric and ferrous sulphate and ferrous ammonium sulphate are used as oxidation catalysts. Ferric salts induce higher oxidation rates than ferrous ones and the nature of the anions present does not affect reaction rate. 4-Chlorophenol is found to be most resistant to oxidation and 2,4,6-Trichlorophenol is not attacked by hydrogen peroxide in the presence of ferric ions at the experimental conditions studied.

scholarly journals Reactions of Ferrous and Ferric Ions with Hydrogen Peroxide

Nature ◽  
1949 ◽  
Vol 163 (4148) ◽  
pp. 692-694 ◽  
Author(s):  
W. G. BARB ◽  
J. H. BAXENDALE ◽  
PHILIP GEORGE ◽  
K. R. HARGRAVE
Keyword(s):  
Hydrogen Peroxide ◽  
Ferric Ions

STUDIES ON THE ENZYMIC FORMATION OF DI-IODOTYROSINE BY A MICROSOMAL PREPARATION OF GOAT SUBMAXILLARY GLAND

1969 ◽  
Vol 44 (2) ◽  
pp. 177-185 ◽  
Author(s):  
RATHA N. HATI ◽  
ASOKE G. DATTA
Keyword(s):  
Hydrogen Peroxide ◽  
Microsomal Fraction ◽  
Submaxillary Gland ◽  
Maximum Activity ◽  
Enzymic Activity ◽  
Subcellular Fractions ◽  
Ferric Ions ◽  
Microsomal Preparation

SUMMARY Subcellular fractions of goat submaxillary gland catalysed the iodination of monoiodotyrosine to form di-iodotyrosine; the microsomal fraction was found to have maximum activity. The enzyme needed copper or hydrogen peroxide for its activity. Thiourea and thiouracil inhibited the enzymic activity. Manganese and ferric ions inhibited the enzymic formation of di-iodotyrosine. The enzyme was solubilized by sodium desoxycholate treatment.

Reactions of ferrous and ferric ions with hydrogen peroxide. Part I.—The ferrous ion reaction

1951 ◽  
Vol 47 (0) ◽  
pp. 462-500 ◽  
Author(s):  
W. G. Barb ◽  
J. H. Baxendale ◽  
P. George ◽  
K. R. Hargrave
Keyword(s):  
Hydrogen Peroxide ◽  
Ferrous Ion ◽  
Ferric Ions
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