Self-supporting porous bodies with adsorbent properties - contain spherical adsorber particles, e.g. active carbon, linked with bridges, e.g. of clay, carbon etc, with voids between particles

摘要

Porous bodies with adsorbent properties (I) are claimed, in which particles of adsorber (II) are linked together by bridges (III), and the voids between the particles = 10-100% of the vol. of the particles. Also claimed are various processes for the prodn. of (I). Pref. (II) is active carbon, mol. sieve or a porous polymer, pref. in the form of spherical particles of dia. 0.1-2.0, esp. 0.3-1.0 mm and (III) consists of inorganic material, esp. Al oxide, pref. in the form of spherical particles with dia. similar to that of (II); (III) can also consist of active carbon or thermoplastic polymer. USE/ADVANTAGE - The self-supporting bodies have adsorbent properties combined with good permeability to air, excellent kinetics and opt. very high thermal stability (contrast prior art systems based on adsorber-contg. polyurethane foam). These can be produced in the form of filter plates, hollow cylinders, spheres, highly porous formed prods. for filter beds, etc. Applications include high-performance adsorption filters, such as odour filters for cars.