Magnesium Nitrate Hexahydrate → Magnesium nitrate

Temperatur

75 °C

This example illustrates the loss of zeolite activity or conversion from conventional selectivation techniques that use compounds which are small enough to enter the zeolite channels. An aqueous solution of magnesium nitrate was prepared by mixing magnesium nitrate hexahydrate and water on the basis of 0.71 gram per gram of water. The solution was used to impregnate a ZSM-5 (SiO2/Al2O3=38) zeolite powder at a ratio of 1.35 cc solution to 1.50 g of zeolite. The mixture was heated at 75° C. to evaporate the water. It was then dried at 120° C. for 6 hours, at 250° C. for ½ hour, and at 300° C. for ½ hour, and then calcined at 500° C. for 3 hours. Analysis of the zeolite sample indicated that 0.06 gram of magnesium oxide per gram of zeolite was deposited on the zeolite.

1. customto evaporate the water
2. customIt was then dried at 120° C. for 6 hours, at 250° C. for ½ hour
3. waitcalcined at 500° C. for 3 hours

ORD-Eintrag

ord-3b915aebd04341629cb8362b4ae72f3e

Quelldatensatz

uspto-grants-2003_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06613708B1