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Process and compositions for Mn containing catalyst for carbo-metallic hydrocarbons

  • US 5,641,395 A
  • Filed: 03/03/1995
  • Issued: 06/24/1997
  • Est. Priority Date: 03/03/1995
  • Status: Expired due to Term
First Claim
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1. In a process for improving the gasoline selectivity, conversion, olefin hydrogenation and/or coke-make for the conversion of hydrocarbons to lower molecular weight products comprising gasoline by contacting said hydrocarbons with a circulating zeolite-containing cracking catalyst in a riser containing hydrogen, which is thereafter regenerated to remove at least a portion of carbon-on-catalyst, the improvement comprising in combination the steps of:

  • a) maintaining a catalyst;

    oil weight ratio of at least about 3; and

    b) adding to at least a portion of said cracking catalyst at least 2400 ppm of manganese and/or chromium, based on the weight of the catalyst;

    whereby gasoline selectivity is increased by at least 1.0 wt. % (measured at 75 weight % conversion) and conversion is increased by at least 2 wt. %;

    both as compared to said process without said manganese or chromium.

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