Heterogeneous acid—base catalysis. Part 2.—Catalysis of the hydrolysis of ethyl vinyl ether (ethoxyethene) by methacrylic acid-divinylbenzene copolymer weak-acid ion exchange resins

1977 ◽  
Vol 73 (0) ◽  
pp. 1128
Author(s):  
Victor Gold ◽  
Colin J. Liddiard ◽  
John L. Martin
Keyword(s):  
Ion Exchange ◽  
Methacrylic Acid ◽  
Weak Acid ◽  
Base Catalysis ◽  
Ethyl Vinyl Ether ◽  
Ion Exchange Resins ◽  
Acid Base ◽  
Ethyl Vinyl ◽  
Exchange Resins ◽  
Hydrolysis Of

A model for the thermal regeneration of ion-exchange resins, Part I

1971 ◽  
Vol 24 (10) ◽  
pp. 1979 ◽  
Author(s):  
SD Hamann
Keyword(s):  
Ion Exchange ◽  
Weak Acid ◽  
Ion Exchange Resins ◽  
Equilibrium Conditions ◽  
Thermal Regeneration ◽  
Equilibrium Relationship ◽  
Acid And Base ◽  
Temperature And Pressure ◽  
Exchange Resins ◽  
Ionization Of Water

A theoretical model has been developed to describe the thermal regeneration of ion-exchange resins in the Sirotherm process1-10 for desalting water. It assumes that the thermal effect is primarily due to the large increase that occurs in the ionization of water when the temperature is raised. The hydrogen and hydroxyl ions compete with salt for exchange sites in the resins and for that reason water, itself, acts as a regenerating acid and base. ��� Calculations have been made of the equilibrium conditions, column behaviour, and titration behaviour of mixtures of weak-acid and weak-base resins with aqueous solutions of 1 : 1 and 2 : 2 electrolytes, assuming the systems to obey Donnan's equilibrium relationship. There is satisfactory agreement between the calculated and observed effects of both temperature and pressure.

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