초록 ▼

A process for the conversion of heavy hydrocarbon feedstocks which are characterized by high molecular weight, low reactivity and high metal contents comprising feeding the feedstock to a hydrodemetallization zone where the feedstock is contacted with hydrogen and a catalyst capable of demetallizing

A process for the conversion of heavy hydrocarbon feedstocks which are characterized by high molecular weight, low reactivity and high metal contents comprising feeding the feedstock to a hydrodemetallization zone where the feedstock is contacted with hydrogen and a catalyst capable of demetallizing organometallic complexes of high molecular weight and cracking resistance, thereafter removing the effluent from the demetallization zone and feeding same to the thermal cracking zone where the effluent is contacted with hydrogen and thereafter feeding the product from the cracking zone to a hydrocarbon conversion zone where the product is contacted with hydrogen and a catalyst capable of cracking molecules of high cracking resistance.

대표청구항 ▼

A process for the conversion of a heavy hydrocarbon feedstock characterized by high molecular weight, low reactivity and high metal contents comprising: (a) feeding said heavy hydrocarbon feedstock characterized by the following composition and properties: ________________________________ -Gravity,

A process for the conversion of a heavy hydrocarbon feedstock characterized by high molecular weight, low reactivity and high metal contents comprising: (a) feeding said heavy hydrocarbon feedstock characterized by the following composition and properties: ________________________________ -Gravity, °API 0-15 KV at 210°F., cst 5000-70,000 Vanadium, wt. ppm 400-800 Nickel, wt. ppm 50-150 Asphaltenes, % wt. 10-25 -Conradson Carbon, % wt.10 500° C. +Residue Content, % wt. 50% ________________________________ to a hydrodemetallization zone wherein said feedstock is contacted with hydrogen and a catalyst capable of demetallizing organometallic complexes of high molecular weight and cracking resistance, said catalyst having the following composition and properties: a molybdenum surface concentration of from 4.0 to 8.0% by weight, a titanium surface concentration of from 0.15 to 1.2% by weight, a nickel surface concentration of from 2.0 to 5.0% by weight, an aluminum surface concentration of from 50.0 to 80.0% by weight and a sulfur surface concentration of from 2 to 10%, as measured by photo-electron spectroscopy (XPS) and a pore volume of from 0.2 to 0.5 cm3/gr, a specific surface of from 50 to 180 m2/gr, a bimodal pore distribution such that 20% of pores is between 10 and 100 Å, and 60% between 100 and 1000 Å, with a particle size of from 0.5 to 3 mm so as to produce an effluent; (b) removing the effluent from said demetallization zone and feeding said effluent to a thermal cracking zone wherein said effluent is contacted with hydrogen so as to produce a cracked product; and (c) feeding the cracked product of said cracking zone to a hydrocarbon conversion zone wherein said product is contacted with hydrogen and a catalyst capable of cracking molecules of high cracking resistance, said catalyst having the following composition and properties: a molybdenum surface concentration of from 1.0 to 3.7% by weight, a titanium surface concentration of from 0.15 to 5.0% by weight, an iron surface concentration of from 6.0 to 20.0% by weight, a nickel surface concentration of from 0.3 to 8.0% by weight, an aluminum surface concentration of from 1 to 20% by weight, a magnesium surface concentration of from 2.0 to 25.0% by weight, and a sulfur surface concentration of from 7.0 to 28.0% by weight, as measured by photo-electron spectroscopy (XPS) and a pore volume of from 0.2 to 0.6 cm3/gr, a specific surface of from 30 to 150 m2/gr, a bimodal pore distribution such that 40% of pores is between 10 and 100 Å, and 40% between 100 and 1000 Å, with a particle size of from 0.5 to 3 mm.