ChemInform Abstract: THE KINETICS OF IONIC/METALLIC ION EXCHANGERS

1975 ◽  
Vol 6 (39) ◽  
pp. no-no
Author(s):  
D. A. OKONGWU ◽  
W. K. LU
Keyword(s):  
Ion Exchangers ◽  
Kinetics Of

Polymer structure and catalytic activity of ion exchangers

1981 ◽  
Vol 46 (7) ◽  
pp. 1577-1587 ◽  
Author(s):  
Karel Jeřábek
Keyword(s):  
Catalytic Activity ◽  
Ethyl Acetate ◽  
Active Sites ◽  
Crosslinking Agent ◽  
Reaction Medium ◽  
Polymer Structure ◽  
Local Concentration ◽  
Ion Exchangers ◽  
Styrene Divinylbenzene ◽  
Kinetics Of

Catalytic activity of ion exchangers prepared by partial sulphonation of styrene-divinylbenzene copolymers in reesterifications of ethyl acetate by methanol and propanol, hydrolysis of ethyl acetate and in synthesis of bisphenol A has been compared with data on polymer structure of these catalysts and with distribution of the crosslinking agent, divinylbenzene, calculated from literature data on kinetics of copolymerisation of styrene with divinylbenzene. It was found that the polymer structure of ion exchangers influences catalytic activity predominantly by changing the local concentration of acid active sites. The results obtained indicated that the effect of transport phenomena on the rate of catalytic reactions does not depend on the degree of swelling of the ion exchangers in reaction medium but it is mainly dependent on the relative affinity of reaction components to the acid groups or to the polymer skeleton.

scholarly journals Effect of solvent on the kinetics of the hydration of 2-methylpropene catalyzed by strong acid ion exchangers

1989 ◽  
Vol 54 (2) ◽  
pp. 183-197 ◽  
Author(s):  
J. Meuldijk ◽  
G.E.H. Joosten ◽  
E.J. Stamhuis ◽  
A.A.C.M. Beenackers
Keyword(s):  
Strong Acid ◽  
Ion Exchangers ◽  
Effect Of Solvent ◽  
Kinetics Of

The kinetics of ionic/metallic ion‐exchangers

1975 ◽  
Vol 63 (2) ◽  
pp. 734-739 ◽  
Author(s):  
D. A. Okongwu ◽  
W. K. Lu
Keyword(s):  
Ion Exchangers ◽  
Kinetics Of

Investigation on kinetics of polyvalent ions in selective ion-exchangers

1992 ◽  
Vol 17 (1) ◽  
pp. 123-124
Author(s):  
A.I. Kalinitchev ◽  
T.D. Semenovskaya ◽  
V.Ja. Filimonov ◽  
T.D. Shepetyuk
Keyword(s):  
Ion Exchangers ◽  
Kinetics Of

Kinetics of Antibiotic Exchange on Fibrous Ion Exchangers

2015 ◽  
Vol 47 (3) ◽  
pp. 187-191
Author(s):  
V. A. Zhukovskii ◽  
S. F. Grebennikov ◽  
T. Yu. Anushchenko ◽  
A. V. Polyanskii ◽  
V. E. Nemilov
Keyword(s):  
Ion Exchangers ◽  
Fibrous Ion Exchangers ◽  
Kinetics Of

Role of Ion Exchange in Release of Biogenic Amines

Physiology ◽  
1989 ◽  
Vol 4 (2) ◽  
pp. 68-71 ◽  
Author(s):  
B Uvnas ◽  
C-H Aborg
Keyword(s):  
Mast Cells ◽  
Ion Exchange ◽  
Biogenic Amines ◽  
Chromaffin Cells ◽  
Ion Exchangers ◽  
Kinetics Of ◽  
Kinetics Of Ion Exchange

Mast cells, chromaffin cells, and nerves contain granule materials that have the characteristics of weak ion exchangers. Biogenic amines are stored in and released from these granules according to kinetics of ion exchange. Studies on isolated mast cells and on adrenals in vivo suggest that amines are released by ion exchange: cytoplasmic K+ being the releasing ion in the preexocytotic phase and Na+ in the exocytotic phase.

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