THE HYDROLYSIS OF ZINC SULFATE SOLUTIONS, SOLUBILITY PRODUCT OF HYDROUS ZINC OXIDE AND THE COMPOSITION OF THE LATTER PRECIPITATED FROM ZINC SULFATE SOLUTIONS

1931 ◽  
Vol 53 (3) ◽  
pp. 832-842 ◽  
Author(s):  
I. M. Kolthoff ◽  
Tohru. Kameda
Keyword(s):  
Zinc Oxide ◽  
Zinc Sulfate ◽  
Solubility Product ◽  
Sulfate Solutions ◽  
Hydrolysis Of

Hydrolysis of Zinc Ion and Solubility of Zinc Oxide in High-Temperature Aqueous Systems

1997 ◽  
Vol 127 (3) ◽  
pp. 292-299 ◽  
Author(s):  
Yukiko Hanzawa ◽  
Daisuke Hiroishi ◽  
Chihiro Matsuura ◽  
Kenkichi Ishigure ◽  
Masashi Nagao ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
High Temperature ◽  
Zinc Ion ◽  
Aqueous Systems ◽  
Hydrolysis Of

Rate of the Bromous Acid-Bromide Reaction Measured in a Br2-HOBr Buffer System in Sulfuric Acid Solution

1989 ◽  
Vol 44 (6) ◽  
pp. 555-566
Author(s):  
Horst-Dieter Försterling ◽  
Szilvia Murányi ◽  
Helmut Schreiber
Keyword(s):  
Sulfuric Acid ◽  
Acid Solution ◽  
Rate Constant ◽  
Sulfuric Acid Solution ◽  
Solubility Product ◽  
Oxidation States ◽  
Buffer System ◽  
Direct Information ◽  
Hypobromous Acid ◽  
Hydrolysis Of

In the Belousov-Zhabotinsky system bromine species of oxidation states - 1 to 5 are important for the start and for the inhibition of the autocatalytic reaction steps. Especially, the reaction of Br- with HBrO2 competes with the oxidation of Ce3+ by BrO2 formed from HBrO2 and HBrO3. In our investigation the reaction of Br- with HBrO2 (solvent 1 M sulfuric acid) is followed spectroscopically in a mixture of bromine and hypobromous acid, which system works as a buffer for bromide. Including experiments on the hydrolysis of Br2 and on the solubility product of AgBr in 1 M sulfuric acid solution direct information about the rate constant kl of the Br-/HBrO2 reaction is obtained (k1 = 2.5 × 106 M-2 s-1 at 20 °C and 4× 106 M-2 s-1 at 25°C, which values are valid in the range of 0.01 to 1 M sulfuric acid).

Submicrometer zinc oxide particles: Elaboration in polyol medium and morphological characteristics

1995 ◽  
Vol 10 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Didier Jézéquel ◽  
Jean Guenot ◽  
Noureddine Jouini ◽  
Fernand Fiévet
Keyword(s):  
Zinc Oxide ◽  
Zinc Acetate Dihydrate ◽  
Morphological Characteristics ◽  
Spherical Particles ◽  
Zinc Salt ◽  
High Yield ◽  
Polyol Medium ◽  
Oxide Particles ◽  
Zinc Oxide Particles ◽  
Hydrolysis Of

A novel and easy route for preparing submicrometer particles of zinc oxide, involving hydrolysis of zinc salt in a polyol medium, is proposed. Zinc acetate dihydrate and diethyleneglycol appear to be the best candidates for obtaining a high yield of particles with well-defined morphological characteristics. Monodisperse spherical particles in the submicrometer range (0.2−0.4 μm) have been obtained for a salt concentration less than 0.1 mol 1−1. The particle size depends mainly on the heating rate. The particles are microporous (surface area: 80 m2 g−1) and are formed by aggregation of small crystallites (10 nm). Calcination at moderate temperature drastically reduces this porosity without significant interparticle sintering. At higher concentration, no aggregation occurs and tiny single crystallite particles are obtained.

Zinc oxide nanoparticles catalyze rapid hydrolysis of poly(lactic acid) at low temperatures

2013 ◽  
Vol 131 (11) ◽  
pp. n/a-n/a ◽  
Author(s):  
Meng Qu ◽  
Huilin Tu ◽  
Miranda Amarante ◽  
Yi-Qiao Song ◽  
S. Sherry Zhu
Keyword(s):  
Zinc Oxide ◽  
Lactic Acid ◽  
Low Temperatures ◽  
Zinc Oxide Nanoparticles ◽  
Poly Lactic Acid ◽  
Oxide Nanoparticles ◽  
Rapid Hydrolysis ◽  
Hydrolysis Of

Studies on the Depolymerization of Poly(ethylene terephthalate) Using 1, 1, 2, 2-Tetramethyl-1-Benzyl-2-n-Octyl Ethylene-1, 2-Diammonium Bromide Chloride as Phase Transfer Catalyst

2014 ◽  
Vol 938 ◽  
pp. 164-169
Author(s):  
V. Lakshmi Narayanan ◽  
M.J. Umapathy
Keyword(s):  
Alkaline Hydrolysis ◽  
Zinc Sulfate ◽  
Ethylene Terephthalate ◽  
Phase Transfer ◽  
Phase Transfer Catalyst ◽  
Dimethyl Benzyl ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Hydrolysis Of ◽  
New Phase

1,4-Bis (dimethyl) benzyl octyl ethylene diammonium bromide chloride has been synthesized, characterized and applied as new phase transfer catalyst in the alkaline hydrolysis of PET leading to depolymerisation. The new phase transfer catalyst has been compared with the alkaline hydrolysis of PET using zinc sulfate as catalyst in the depolymerization. It was found that the newly synthesized phase transfer catalyst exhibited excellent conversion than the alkaline hydrolysis of PET using zinc sulfate as catalyst.

Purification of zinc sulfate solutions from cobalt and nickel through activated cementation

2004 ◽  
Vol 73 (1-2) ◽  
pp. 163-168 ◽  
Author(s):  
Boyan S. Boyanov ◽  
Victoria V. Konareva ◽  
Nikolai K. Kolev
Keyword(s):  
Zinc Sulfate ◽  
Sulfate Solutions ◽  
Cobalt And Nickel
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