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Method for producing zeolites with reduced surface acidity

  • US 5,234,872 A
  • Filed: 05/11/1992
  • Issued: 08/10/1993
  • Est. Priority Date: 05/11/1992
  • Status: Expired due to Term
First Claim
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1. A process for the selective surface dealumination of an organic-containing zeolite comprising contacting said zeolite with dicarboxylic acid for a sufficient time to effect at least about a 25% reduction in surface acidity with less than about 50% overall dealumination.

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