Purolite® CT275DR

Macroporous Strong Acid Resin Catalyst

Purolite CT275DR is a superior macroporous strong-acid catalyst resin which has been developed from poly(vinylbenzenesulfonate) cation exchangers. While ordinary commercial styrene-based sulphonic acid resins may often be used for chemical reactions catalyzed by the H+ ion, faster process times, better yields and higher product purity may be obtained by using a properly designed and purified catalyst resin such as Purolite CT275DR. It is supplied dried to less than 3% moisture, ready for use. Alternatively it can be supplied completely water-swollen as Purolite CT275. Purolite CT275DR has been specially designed with large pores for greater accessibility to the acid sites. The more rigid structure ensures improved uptake but lower swelling characteristics in polar solvents compared with competitive materials, resulting in a higher concentration of acid sites. This resin is particularly useful in diffusion-controlled or kinetically-limited reactions. Purolite CT275 has been qualified and recommended for tertiary alkyl methyl ether (TAME) in particular, methyl tertiary butyl ether (MTBE). It offers distinct advantages over other commercially available catalysts with respect to its high acidity and large pores which provide more available acid sites and minimize the potential for pore plugging.

BASIC FEATURES:

Application - Dry for Catalysis
Polymer Structure - Macroporous polystyrene crosslinked with divinylbenzene
Appearance - Spherical Beads
Functional Group - Sulphonic Acid
Ionic Form as Shipped - H+

PRODUCT INFORMATION

Residual Moisture (max.) 3 %
Dry Weight Capacity (min.) 5.2 eq/kg
Mean Size Typical 0.65-0.90 mm
Uniformity Coefficient (max.) 1.7
Specific Gravity 1.2 g/ml
Pore Volume 0.4 - 0.6 ml/g
Specific Surface Area 20 - 40 m2/g
Median Pore Diameter D50A 400 - 700 Å
Temp Limit, H+ Form 145 °C (290 °F)
Surface Acidity Acid Strength 60 kJ mol-1