A process for the regeneration of a supported noble metal catalyst comprising contacting the catalyst with a liquid aqueous system at a temperature in the range of from 90 to 160 C., wherein the pH of the aqueous system is outside the range of from 6 to 8, separating the aqueous system from catalyst; and subjecting the catalyst to calcination.

A process for the regeneration of a supported noble metal catalyst comprising contacting the catalyst with a liquid aqueous system at a temperature in the range of from 90 to 160 C., wherein the pH of the aqueous system is outside the range of from 6 to 8, separating the aqueous system from catalyst; and subjecting the catalyst to calcination.

Present invention relates to a novel process for upgrading a residual hydrocarbon oil feedstock having a significant amount of Conradson Carbon Residue (concarbon), metals, especially vanadium and nickel, asphaltenes, sulfur impurities and nitrogen to a lighter more valuable hydrocarbon products by reducing or minimizing coke formation and by injecting fine droplets of oil soluble organo-metallic compounds at multiple elevations of the riser with varying dosing rates.

The present invention relates to the use, in a method for in-situ activation of at least one hydrotreating, in particular hydrocracking, catalyst, of at least one nitrogen compound having at least one of the following characteristics: a) a nitrogen content by weight in the range from 15 to 35 wt %, relative to the total weight of the nitrogen compound; b) a number of nitrogen atoms in the range from 2 to 20; c) a boiling point in the range from 140 C. to 300 C.; and d) said nitrogen compound being in liquid form at room temperature and atmospheric pressure.

The present invention also relates to the method for in-situ activation of at least one hydrotreating catalyst comprising at least one step of sulphiding said hydrotreating catalyst in the presence of a sulphiding agent, and a step of passivation of said hydrotreating catalyst in the presence of said at least one nitrogen compound.

A metal contaminated spent catalyst or regenerated catalyst from a biomass conversion unit may be subjected to an ammonium wash in order to remove potassium. The ammonium wash may include ammonium sulfate, ammonium nitrate, ammonium hydroxide, ammonium acetate, ammonium phosphates, and mixtures thereof. Acidity and catalytic activity of the biomass conversion catalyst is restored by the removal of potassium contaminants.

A metal contaminated spent catalyst or regenerated catalyst from a biomass conversion unit may be subjected to an ammonium wash in order to remove potassium. The ammonium wash may include ammonium sulfate, ammonium nitrate, ammonium hydroxide, ammonium acetate, ammonium phosphates, and mixtures thereof. Acidity and catalytic activity of the biomass conversion catalyst is restored by the removal of potassium contaminants.

This present invention relates in general to method for recovery of catalytic elements from raw carbon nanotubes (CNT). The present invention particularly relates to a method recovery of catalytic elements using a filtrate solution containing recovered catalytic elements from a CNT purification process. The present invention also relates to use of recovered/recycled catalytic elements for CNT production.

This present invention relates in general to method for recovery of catalytic elements from raw carbon nanotubes (CNT). The present invention particularly relates to a method recovery of catalytic elements using a filtrate solution containing recovered catalytic elements from a CNT purification process. The present invention also relates to use of recovered/recycled catalytic elements for CNT production.