Patent ID: 8221525

Claim:
An oxygen enrichment membrane produced in accordance with a method comprising the steps of: forming a plurality of SAPO seed crystals from a synthesis gel composition of 1.0 Al 2 O 3 :1.0 P 2 O 5 :0.4 SiO 2 :1.0 TEAOH:0.8 dipropylamine:0.8 cyclohexylamine:at least 100 H 2 O; seeding a porous support with said SAPO seed crystals, forming a seeded porous support; heating said seeded porous support in a heating vessel containing a membrane synthesis gel composition of 1.0 Al 2 O 3 :1.0 P 2 O 5 :0.4 SiO 2 :1.0 TEAOH:1.6 dipropylamine:at least 100 H 2 O, forming a membrane of SAPO crystals; and calcining said membrane of SAPO crystals, forming said oxygen enrichment membrane.