Purolite

Purity ofthe sugar Purkinje fibers Purolite... 

Purolite Corporation - London company offers ion exchange products and polymeric absorbents. Find corporate info, offices worldwide, products, services, and contacts...http //www.purolite.com.. 

Resin Ionac/ Relite Kastel Lewalit Purolite Resin tech ... 

Lewatit is a trademark of Bayer Corporation Purolite is a trademark of Purolite International Resintech Is a trademark of Resintech, Inc. 

Cation-exchange resins are used as catalysts in the produdion of MTBE (methyl tertiary-butyl ether, 2-methoxy-2-methylpropane) and various other oxygenates and, lately, also in the dimerization of isobutene [30]. Other commercial applications of the cation-exchange resins indude dehydration of alcohols, alkylation of phenols, condensation readions, alkene hydration, purification of phenol, ester hydrolysis and other reactions [31]. The major producers of ion-exchange resins are Sybron Chemicals Incorporated [32] (Lewatit resins), Dow Chemical Company [33] (DOWEX resins), Purolite [28] (Purolite resins), and Rohm and Haas Company [27] (Amberlyst resins). 

Purolite Company, Purolite ion exchange resins product data sheet, http //www.puroliteusa.com/ftp/ ProductData/ Catalysts/ CTSE RIE S. pdf,... 

J.A. Dale, N.V. Nikitin, Technical Notes on Hypersol-Macronet, Purolite Inti, Pon-tyclun, S. Wales, UK. 

Prasher, B.D., Wills, G.B., Industrial Engineering Chemistry Design and Development, 12, 351 (1973) Purolite, Ion Exchange Resins, Technical Data Brochure, The Purolite Company, www.purolite USA.com (US)... 

Wolff, J.J., Catalysis by means of Ion Exchange Resins, Purolite Technology Seminar, Breda, Holland, 12 (May 1987)... 

Purolite United States, Wales, Romania Purolite... 

From tables for Purolite C-100 strong acid cation-exchange resin, it can be seen that the theoretical operating capacity is 35,000 grains/cu ft at 15 lb/cu ft salt. This resin can accept a raw water flow of 8 to 40 BV/hr. 

The Purolite Company, Purolite Product Data Manual The Purolite Company, USA. 

The solid supports used in this study were macroporous co-polymers of vinylpyridine and styrene crosslinked with divinylbenzene. Polymers of this type in the form of beads are available commercially (e.g. Reillex 425) and were also prepared for this study by Purolite. For spectroscopic studies, a more convenient sample morphology was required and thin-film polymers of similar stoichiometry were synthesised by the group of Sherrington at the University of Strathclyde. Full details of the methods used to prepare thin film polymers are reported elsewhere.11 To generate the ion exchange resin, the pyridyl functionalities of the polymer were quatemised with methyl iodide (Eq 1). 

Poly(4-vinylpyridine-co-styrene-co- divinylbenzene) were supplied in the form of beads (Reillex 425 and Purolite ) or prepared as thin films (dimensions ca. 76 x 14 mm x 40-120 pm) at the University of Strathclyde.11 Quatemisation of the pyridine groups was carried out by slow addition of the polymer (typically 1 g) to ethanol (40 cm3) To this was added methyl iodide (2 cm3) and the mixture was heated to 50 °C for 2 hours and then cooled. The quatemised polymer was washed with ethanol followed by acetone and then vacuum dried. 

Heller, T., et al. (1997). Properties and performance of Type 111 strong base anion exchange resin Purolite A555. Proc. 1997 Int. Conf. on Power Generation, POWER-GEN, Dec. 9-11, Dallas, TX, 158. PennWell Publ. and Exhib., Houston. TX. 

Authors thank Dr. W.R. Betz (Supelco, Inc.) and Dr. J.A. Dale (Purolite Int., Ltd.) for providing samples of carbons and resins, respectively. 

Resin requirements for two extremes of ion concentration are analyzed in Example 15.3. The high concentration stream clearly is a candidate for continuous ion exchange. Manufacturers and distributors of ion exchange resins are Dow, Rohm and Haas, Bayer, Kasai, Sybron Chemical and Purolite. 

Photographs kindly made available by Purolite International Limited)... 

Brand name Purolite Purofine Amberlite Amberjet Duolite Dowex Mono sphere Lewatit... 

Manufacturer Brand name Purolite Int. Purolite Purofine Rohm and Haas Amberlite Duolite Amberjet Dow Chemical Dowex Monosphere Bayer Lewatit... 

As with MTBE, acidic resins are the catalysts employed in the industrial practice for ETBE synthesis standard products, made from different manufacturers in the form of spherical beads (e.g., Rohm and Haas, Bayer, Purolite, Dow), have similar characteristics - a macroporous structure, polystyrene-divinylbenzene, functionalized with sulfonic groups (active sites 5.2 eq H per kg). 

Commercial ion exchangers in hydrogen, sodium, and chloride form are available under the trade names Amberlite, Duolite, Dowex, Ionac, and Purolite. Typically, they are in the form of spherical beads from about 40 pm to 1.2 mm in diameter. The two most common adsorbents used in chromatography are porous alumina and porous silica gel. Of lesser importance are carbon, magnesium oxide, and various carbonates. 

All resins were used in their forms. The sulfonic acid group concentrations were measured by Purolite, using a standard procedure of ion-exchange with Na followed by aqueous titration with standard NaOH solution. Water contents of the fully swollen resins were also determined by Purolite. 

The above-postulated types of substitution on the benzene rings are also characteristic of the hypercrosslinked sorbent MN-200 currently produced by Purolite International Ltd. (Llantrisant, Wales, UK) on an industrial scale. In its spectrum the band at 760 cm is barely visible and the absorbance at 700 cm is also small. Most probably the crosslinking density of this polymer is high and it contains only very few free phenyl groups. 

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