Sulfur (S) is a typical metalloid. The radius of sulfur atom is 1.05 Å. It easily acquires two electrons to form an ion S2-. The coefficient of diffusion of sulfur in liquid iron is 0.74x10-4, 13x10-4, 1.9x10-5cm/s, according to various experimental data. Sulfur has a strong sur...
metalloid element, and a second metal or metalloid element; and a process for synthesizing it comprising modification of a phosphorous compound using one or more functional groups, and interaction of the modified phosphorous compound with at least two kinds of metal compound and/or metalloid ...
A silica-containing composition is disclosed. The composition comprises a compound having the following formula: (SiO2)x(OH)yMzOaFB: wherein M is at least one of the following metal or metalloid cations: boron, magnesium, aluminum, calcium, titanium, vanadium, manganese, iron, cobalt, nickel, ...
According to the sulfur-resistant nitrogen oxide attapulgite manganese-based SCR catalyst, the low-price attapulgite serves as the carrier, metal oxide or metalloid M oxide is added so that an attapulgite manganese-based low-temperature SCR denitration catalyst can be improved, the sulfur-resistant ...
Process for the presulfurisation and activity control of a hydrocarbon treatment catalystdoi:doi:EP0335754 A1ofA process for two-stage treatment of a new or regenerated catalyst containing (a) a support based on at least one oxide of a metal or of a metalloid and (b) at least one ...
Process for the presulfurisation and activity control of a hydrocarbon treatment catalystA process for two-stage treatment of a new or regenerated catalyst containing (a) a support based on at least one oxide of a metal or of a metalloid and (b) at least one active metal, in which ...
The invention relates to a process for treating a new or regenerated catalyst containing a support having as a base at least one metal or metalloid oxide and at least one active metal, comprising treating the catalyst with at least one sulfuration agent dissolved in a so...
CONSTITUTION: A catalyst produced by depositing active metals on a carrier essentially comprising a metal or metalloid oxide is treated with a sulfurizing agent expressed by formula I at a temp. of 0 to 50C without the presence of hydrogen to introduce the sulfurizing agent into the pores of...
1. A process for the treatment of a fresh or of a regenerated catalyst, comprising a carrier whose main constituent is at least one metal or metalloid oxide and at least one active metal, conducted in the absence of hydrogen and consisting of treating said catalyst with an aqueous solution ...
A process for two-stage treatment of a new or regenerated catalyst containing (a) a support based on at least one oxide of a metal or of a metalloid and (b) at least one active metal, in which process, in a first stage carried out ex situ approximately between 0 and 50 DEG C and...