Ion exchange in the preparation

Ion exchange in the preparation of e-aminocaproic acid, 32, 13 Isoamylacetylene, 30, 17 2H-IS0AZEPINE, 3,4,5,6-tetrahydro-7-methoxy-, 31, 72 Isobutyranilide, 33, 30 Isobutyric acid, 33, 29... 

A variety of reverse osmosis membrane systems based on cellulose acetate, aromatic polyamides, and other polymers have been tested for their potential applications. Reverse osmosis membrane equipment is available for large-scale operation since the process is widely used for the production of potable water from sea or brackish waters and upstream of ion exchange in the preparation of ultrapure water for steam-generating boilers. In these applications, the feed concentrations may vary from 500 to 40,000 mg/L of dissolved solids. The RO technique can be used at pH values between 3 and 12 and up to 45°C. 

Impregnation and ion-exchange methods for preparation of supported catalysts are discussed in detail in Section 2.2.1.1. Only ion exchange in the solid state as a novel method to prepare zeolite catalysts is described here. 

Sugita, M, Tsuji, M., and Abe, M, Synthetic inorganic ion-exchange materials. LIV. The amphoteric behavior of hydrous titanium dioxide ion exchangers in different preparations, Bull. Chem. Soc. Jpn, 63, 559, 1990. 

Ion exchange in catalyst preparation is very similar to ionic adsorption but involves exchange of ions other than protons. Lower valency ions, such as Na, exchange with ions having higher charge, for example Ni. according to the equilibrium... 

Conditions affecting the in vitro synthesis of poly-D-galacturonase by Fusarium oxysporum have been studied, and the enzyme has been isolated by ion-exchange chromatography. The preparation contained two distinct isoenzymes that behaved as charge isomers on polyacrylamide gel electrophoresis. Some properties of the isoenzymes (mol. wt. 3.7 x 10 ), which contain covalently linked carbohydrate residues, were compared. 

Fig. 10.5) with the addition of Cu, there was a significant increase in the intensity of this band, thus confirming that there was an ion exchange during the preparation stage. The increase in intensity of the band of the Lewis sites (1450 cm ) in the exchanged sample is indicative of the presence of Cu " " ions at the surface. 

Chlorosulfuric acid is used as a sulfonating agent in the preparation of resin-based ion exchange (qv) materials. Sulfonation of glycol phthalate or... 

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