Process and adsorbent for gas drying
OwnerVladislav I. Kanazirev, Alan P. Coheninventors
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Abstract
An adsorbent and a process are disclosed for drying gases in a pressure swing dryer. The adsorbent comprises a pre-formed alumina particle with a thin layer of colloidal silica disbursed on the surface of the preformed alumina particle. Surprisingly the thin layer of colloidal silica does not interfere with the drying properties of the pre-formed alumina particle, while significantly improving the physical properties of the pre-formed alumina particle
Claims19
A process for the drying of a compressed gas comprising a gas component and water, said process comprising contacting the compressed gas stream with an adsorbent to adsorb at least a portion of the water to produce a dry compressed gas stream, wherein said selective adsorbent comprises a shaped alumina particle having dispersed thereon a colloidal silica layer.
A method for producing an adsorbent for drying compressed gas comprising:
- a) coating a pre-formed alumina particle with a coating solution comprising colloidal silica to provide a coated pre-formed particle having a narrow layer of colloidal silica disbursed thereon;
- and
- b) drying and activating the coated pre-formed particle to produce the adsorbent.
A shaped particle having a core consisting of a shaped alumina carrier having a colloidal silica layer dispersed on the shaped alumina carrier, at least 60 percent of the colloidal silica being present in a band extending from the surface towards the center and having a width of less than about 50 microns.
Dependencies are inferred from the claim text.