Process for stabilizing catalysts of the silicalite type

Details Process for stabilizing catalysts of the silicalite type Process for stabilizing catalysts of the silicalite type

B - Operations, Transporting

01

J

252/2.E

B01J 29/04 (2006.01) B01J 29/035 (2006.01) C01B 33/18 (2006.01)

Patent

CA 1277971

Abstract of the disclosure Process for stabilizing catalysts of the silicalite type It is disclosed a process for stabilizing crystalline polymorph silica catalysts of the silicalite type. The catalysts are halogenated by contacting it with a gaseous stream comprising one or several chlorinated, brominated or fluorinated aliphatic organic compounds, having a vapor pressure of at least 13 kPa at 200-230°C, and an halogen/carbon atomic ratio of at least 1, and a non-reducing gaseous vehicle, at a temperature comprised between 200 and 500°C and during a period of time sufficient to fix 0.1 - 5.0 wt % of halogen on the catalysts.

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