Ammonia separation using ion exchange polymeric membranes and sorbents
AssigneeAir Products and Chemicals, Inc.
InventorsDaniel V. Laciak, Guido P. Pez
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Abstract
The present invention is a process for separating ammonia from mixtures of other gases or from aqueous streams. The ammonia containing mixture is contacted with an anion exchange polymer cast into membrane form, which selectively permeates NH.sub.3 thereby providing a separation from the other components in the mixture. Alternatively, ammonia recovery may be achieved by employing the said anion exchange polymer as a selective, reversible NH.sub.3 sorbent.
Claims19
A process for separating ammonia from a mixture of gases containing ammonia and at least one other component, said process comprising:
- contacting said mixture with an anion-exchange polymer, cast into membrane form, having the general structural formula:
- ##STR6## where R is methyl, phenyl or hydrogen, A.sup.+ is any bound cationic species, X.sup.- is any anion and n is between 10 and 10.sup.7.
A process for separating ammonia from a mixture of gases containing ammonia and at least one other component, said process comprising:
- contacting said mixture with an ion-exchange polymer, cast into membrane form, having the general structural formula:
- ##STR8## wherein X.sup.- is any anion and n is between 10 and 10.sup.7.
A process for separating ammonia from a mixture of gases containing ammonia and at least one other component comprising:
- contacting said mixture with an anion exchange polymer, having the general structural formula:
- ##STR9## where R is methyl phenyl or hydrogen, A.sup.+ is any bound cationic species, X.sup.- is any anion and n is between 10 and 10.sup.7, such that said polymer selectively and reversibly sorbs ammonia from the mixture.
A process for separating ammonia from a mixture of gases containing ammonia and at least one other component comprising:
- contacting said mixture with an anion exchange polymer, having the general structural formula:
- ##STR11## wherein X.sup.- is any anion and n is between 10 and 10.sup.7, such that said polymer selectively and reversibly sorbs ammonia from the mixture.
Dependencies are inferred from the claim text.