Adsorption of Triton X-100 on ultra-stable zeolite Y

摘要

Preparation of zeolite particles in the micrometer range was performed by heat treatment of compacted zeolite powder. The fractionated particles were used as a matrix for the adsorption of Triton X-100 in water solution and the rate of adsorption was studied. The rate of adsorption was enhanced either by treatment with a blowing agent prior to compaction into pellets or with metakaolinite, used as a binder in the sintering procedure. For particles in the range 63-125 mu m, up to 90% of the Triton X-100 was adsorbed after one minute. The effect of the blowing agent increased with particle size and for particles in the range 250-500 mu m, adsorption after one minute increased from 40 to 60%. This implies that shorter contact times can be used in systems working with batch procedures, e.g. in the removal of detergents from protein solutions. In how systems the residence times may be lowered due to the increased intraparticle diffusion rates. Transmission electron microscopy (TEM) studies confirmed the presence of a secondary pore system in the zeolite, with diameters in the range 5-50 nm. The size of the Triton X-100 micelles was estimated to be 10 nm in diameter by direct imaging with frozen hydrate cryo-TEM. [References: 15]