Macro reticular resin

Figure 5. UV-vis absorbance spectra of aqueous extract of ether macro-reticular resin elution.

Bregeault and co-workers have reported supporting [HP04 W0(02)2 2]2 species on resins and silica (Table 4.6).64 Amberlyst A26 was the macro-reticular resin used. The PW2 species was supported onto dehydrated porous silica. The catalysts were found to be highly selective for the epoxidation of limonene by hydrogen peroxide. 

While this study of the effect of the resin s surface area was performed by using different macro-reticular resins, it is felt that the primary variable being changed is surface area, since all the... 

In recent years new types of ion exchangers, the so-called macro-reticular resins, have become commercially available. They are based on a highly cross-linked matrix (which is resistant to swelling) but contain wide rigid pores. Their catalytic action has not so far been the subject of kinetic studies, but it seems improbable that the two-phase model would apply to them [39]. It is more likely that this catalysis would involve true surface reaction which may bear some analogies to reactions which are thought to occur at the interface of immiscible liquid solvents [40]. 

The pore structure of most cross-linked polystyrene resins are the so called macro-reticular type which can be produced with almost any desired pore size, ranging from 20A to 5,000A. They exhibit strong dispersive type interaction with solvents and solutes with some polarizability arising from the aromatic nuclei in the polymer. Consequently the untreated resin is finding use as an alternative to the C8 and Cl8 reverse phase columns based on silica. Their use for the separation of peptide and proteins at both high and low pH is well established. 

Liquid phase isobutane/butene-2 alkylation was conducted at 0 -60°c using a stirred-tank reactor in the presence of a catalyst comprising of a macro-reticular acid cation exchange resin and boron trifluoride. Neither BF3 nor resin alone was effective for alkylation. For the sulfonic acid resin/BF3 sys-... 

Amberlyst [Rohm Haas] Macro-reticular ion exchange resin for nonaq. fluid treatment. 

Millar, J. A., Smith, D. G., Mart, W. E., Kresmann, T. R. E. (1963). Solvent modified polymer networks. Part 1. The preparation and characterization of expanded networks and macroporous styrene-DVB copolymers and their sulfonates. JQiera Soc, 218-225. Kun, K. A., Kunin, R. (1968). Macroreticular resins 111. Formation of Macro reticular Styrene-Divinyl benzene copolymers. JPolym Sci, PartAl, Polym Chem. 6,2689-2701. 

Egawa, H., M. Makayama, T. Nonaka, and E. Sugihara, Recovery of Uranium fi om Sea Water Influence of Crosslinking Reagent on Uranium Adsorption of Macro-reticular Chelating Resin Containing Amidoxime Group, J. Appl. Polym. Sci., 33, 1993-2005, 1987. 

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