Patent ID: 11964262
Assignee: RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 7:
8. The process according to claim 3, wherein in step c, the ammonium exchange treatment comprises treating the base washed molecular sieve with an aqueous solution containing an ammonium salt, and conditions for the ammonium exchange treatment comprise: a weight ratio of the molecular sieve on a dry basis to the ammonium salt and water of 1:(0.1-1):(5-10), a temperature of 10-100° C., and/or a treatment duration of 0.2-4 hours; and
the ammonium salt is one or more selected from ammonium chloride, ammonium sulfate, and ammonium nitrate.