71results about How to "Low sulfur and nitrogen content" patented technology

A two-way combined process of wax oil hydro-process and catalytic crack is carried out by entering wax oil, catalytic cracking re-circulating oil and catalytic cracking diesel oil into hydro-processor, hydrogenation reacting under existence of hydrogen and hydrogenation catalyst, separating for reactant to obtain gas, hydrogenation naphtha oil, hydrogenation diesel oil and hydrogenation tail oil, entering hydrogenation tail oil into catalytic cracker, crack reacting under existence of catalytic cracking agent, separating to obtain dry gas, liquefied gas, catalytic cracking gasoline, catalytic cracking diesel oil and catalytic cracking re-circulating oil and oil slurry, and circulating for catalytic cracking diesel oil and catalytic cracking re-circulating oil to hydro-processor. It has higher recovery rate and cetyl value, less sulfur content, arene content and coke output.

The invention provides a method for processing inferior heavy oil. The method comprises the following steps: adopting a riser and a bed reactor to preheat the inferior heavy oil raw material, injecting the preheated raw material in a riser reactor, keeping the raw material in contact with solid catalysis grains in the riser and taking reaction, controlling the riser reaction temperature at 550-610 DEG C, introducing the oil gas after reaction to the upper-layer tandem bed reactor through the riser reactor to continuously react, keeping the bed reactor temperature at 440-520 DEG C, and weight hourly space velocity at 0.5-5 h-1, separating the oil gas after reaction from the contained solid catalysis grains, and sending the oil gas to a fractionating system, wherein the specific surface area of the solid catalysis grains is larger than 80 m<2> . g<-1>; the pore volume is larger than 0.22 ml / g; the abrasion index is smaller than 2.0%; the micro-activity index is 20-50. The method provided by the invention can effectively remove carbon residue, heavy metal, asphaltene and other impurities from the inferior heavy oil, synchronously obtain higher yield of the liquid product, and is simple in the processing technology.

The invention relates to a combined technique for improving yield of high-octane gasoline by using inferior catalytic cracking diesel. The combined technique comprises the following steps: firstly, carrying out polycyclic aromatic hydrocarbon selective hydrogenation, desulfurization and denitrification reaction on the inferior catalytic cracking diesel through a hydrofining reactor at a hydrogen atmosphere and under a relatively gentle refining condition; feeding a refined liquid-phase product into a reactor for conversion to light fraction and filled with a noble metal catalyst and carrying out hydrogenation conversion to light fraction; and finally, achieving the purpose of increasing the yield of the high-octane gasoline. By the technique, the inferior catalytic cracking diesel can be treated, and meanwhile, reforming C10+ heavy aromatics are converted to light fraction; the combined technique has relatively high gasoline fraction yield, gasoline fraction aromatics selectivity and liquid yield, and meanwhile, the inferior catalytic cracking diesel and the C10+ heavy aromatics are utilized effectively at high value.