| 摘要 |
<p>A zeolite synthesis method which comprises forming an AEI zeolite reaction admixture comprising a mother liquor, or portion thereof, from an AEI synthesis process, wherein the mother liquor, or portion thereof, comprises an AEI structure directing agent; and reacting the admixture under crystallization conditions to form a batch of zeolite crystals having an AEI framework and a subsequent mother liquor. The admixture may comprise a source of aluminium, a source of silica, a source of hydroxide ions and a structure directing agent (SDA) such as N,N-Dimethyl-3,5-dimethylpiperidinium, N,N-Dimethyl-2-(2- hydroxyethyl)piperidinium, N,N-Dimethyl-2-ethylpiperidinium, and 2,2,4,6,6-Pentamethyl-2-azoniabycyclo[3.2.1]octane. Also disclosed is zeolite synthesis process to form zeolite crystals having an AEI framework with a silica-to-alumina ratio (SAR) of 8 to 50, which results in an overall relative yield on silica of at least 60 percent. Also disclosed are AEI zeolite crystals of mean aspect ratio of less than or equal to 3.</p> |
