Extraction kinetics of palladium(II) with bis(2-ethylhexyl) sulfoxide from hydrochloric acid media

1991 ◽  
Vol 30 (6) ◽  
pp. 1257-1261 ◽  
Author(s):  
Hanzhang Wang ◽  
Jianhua Pan ◽  
Jiansheng Gu
Keyword(s):  
Hydrochloric Acid ◽  
Extraction Kinetics ◽  
Acid Media ◽  
Hydrochloric Acid Media ◽  
Kinetics Of

Electrochemical study of the degradation kinetics of polyaniline powder in sulfuric and hydrochloric acid media

2002 ◽  
Vol 6 (8) ◽  
pp. 522-527 ◽  
Author(s):  
V. Vivier ◽  
C. Cachet-Vivier ◽  
A. Regis ◽  
G. Sagon ◽  
J.-Y. Nedelec ◽  
...  
Keyword(s):  
Hydrochloric Acid ◽  
Degradation Kinetics ◽  
Electrochemical Study ◽  
Acid Media ◽  
Hydrochloric Acid Media ◽  
Kinetics Of

Kinetics of hydrolysis and rearrangements of S-acylthiouronium salts

1982 ◽  
Vol 47 (10) ◽  
pp. 2702-2710 ◽  
Author(s):  
Jaromír Kaválek ◽  
Jaroslav Novák ◽  
Vojeslav Štěrba
Keyword(s):  
Hydrochloric Acid ◽  
Dilute Hydrochloric Acid ◽  
Reaction Rate ◽  
Acetyl Derivative ◽  
Reaction Products ◽  
Acid Media ◽  
Hydroxyl Ion ◽  
Hydrochloric Acid Media ◽  
Kinetics Of ◽  
Acyl Derivatives

Kinetics of transformation of S-acetyl- and S-benzoylisothiouronium chlorides have been followed, and its reaction products in dilute hydrochloric acid media and aqueous buffers have been identified. In dilute hydrochloric acid the reaction rate is pH-independent, and the acetyl derivative reacts 8 times as rapidly as the benzoyl derivative. In acetate and phosphate buffers the decomposition rate of the both derivatives increases linearly with the buffer concentration. In acetate buffers the reaction rate is pH-independent, and acetate ion reacts as a nucleophile. In phosphate buffers the rate increases with increasing pH. The reaction catalyzed by the basic buffer component produces thiourea and carboxylic acid, that catalyzed by hydroxyl ion produces N-acetyl- or N-benzoylthiourea. The solvolysis rates of both S-acyl derivatives depend on percent composition of water-methanol solvent. The maximum solvolysis rate is reached in methanol with 25% (v/v) water.

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