MOLECULAR SIEVES AND PROCESSES FOR THEIR MANUFACTURE
摘要
<p>PCT No. PCT/EP96/05579 Sec. 371 Date Jan. 13, 1999 Sec. 102(e) Date Jan. 13, 1999 PCT Filed Dec. 2, 1996 PCT Pub. No. WO97/25129 PCT Pub. Date Jul. 17, 1997Structures comprising a crystalline molecular sieve layer on a substrate and an additional layer of a refractory material to occlude voids in the molecular sieve layer.</p>
