Molecular sieve adsorbent for gas purification and preparation thereof
AssigneeZeochem LLC
InventorsEdward J. Rode, Albert M. Tsybulevskiy
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Abstract
A molecular sieve adsorbent for the purification of gas streams containing water vapor and carbon dioxide and a process for its preparation. The adsorbent is a sodium form of a low-silica faujasite having a silica to alumina ratio of about 1.8:1 to about 2.2:1, a residual content of potassium ions less than about 8.0 percent (equiv.), a low content of crystalline and amorphous admixtures and crystal sizes generally within the range of 1-4 μm, blended with a binder.
Claims25
A molecular sieve adsorbent for gas purification which comprises a sodium form of low-silica faujasite, having a silica:
- alumina ratio of about 1.8-2.2 with a residual content of potassium ions less than about 8.0 percent (equiv.), and a binder, wherein at least about 80% of said low-silica faujasite, by weight, has a crystal size in the range of 1-4 μm and wherein the adsorbent has a volume of macropores with a radius from about 1000 to 10,000 Å of at least about 0.4 cm3/g.
A process for the production of a molecular sieve adsorbent comprising
- preparing a sodium form of a low-silica faujasite, wherein the low-silica faujasite has a silica:
- alumina ratio of about 1.8 to about 2.2 and a residual content of potassium ions less than about 8.0 percent (equiv.);
- blending the resultant product with a binder and a peptizer, where in the blended product has a volume of macropores with a radius from about 1000 to 10000 Å of at least about 0.4 cm3/g;
- forming the blended product into a shaped article;
- and
- drying and calcining the article to produce the adsorbent product.
Dependencies are inferred from the claim text.