5A molecular sieve adsorbent and method for preparation of the same

摘要

The present invention provides an adsorbent and a method for preparation of the adsorbent, wherein, the average crystal grain diameter of 5A molecular sieves in the adsorbent is 0.2-2.1 μm; measured on the basis of the dry weight of the adsorbent, the content of 5A molecular sieves in the adsorbent is 92 wt. % or higher; the breaking ratio of the adsorbent at 250N is 9% or lower. The method for preparation of the adsorbent comprises: processing a powder material that contains 4A molecular sieves and a binder source by roll forming to obtain beads; drying and calcining the beads to obtain matrix beads; pre-wetting the matrix beads and then processing the matrix beads by crystal transformation so that the binder in the matrix beads is essentially transformed into 4A molecular sieves, to obtain 4A molecular sieve beads; washing the 4A molecular sieve beads with water and then processing the 4A molecular sieve beads by calcium exchange to obtain 5A molecular sieve beads; washing the 5A molecular sieve beads with water and then drying and calcining the 5A molecular sieve beads. The adsorbent provided in the present invention has advantages such as high adsorptive capacity and adsorption efficiency for n-alkanes and high strength.