38results about How to "Reduce hydrocarbon content" patented technology

Particulate sorbent compositions which are suitable for the removal of sulfur from streams of cracked-gasoline or diesel fuel are provided which have increased porosity, improved resistance to deactivation through the addition of a calcium compound selected from the group consisting of calcium sulfate, calcium silicate, calcium phosphate or calcium aluminate to the support system comprised of zinc oxide, silica and alumina having thereon a promotor wherein the promotor is metal, metal oxide or metal oxide precursor with the metal being selected from the group consisting of cobalt, nickel, iron, manganese, copper, molybdenum, tungsten, silver, tin and vanadium or mixtures thereof and wherein the valence of such promotor has been substantially reduced to 2 or less. Process for the preparation such sorbent systems as well as the use of same for the desulfurization of cracked-gasolines and diesel fuels are also provided.

The invention relates to an apparatus for separating hydrocarbons from solid particles, wherein the apparatus comprises a slurry inlet for receiving a slurry comprising water, hydrocarbons and solid particles, a water supply for rinsing water, and a slurry outlet. The apparatus further comprises a plurality of nozzles configured to provide rinsing water as droplets with sufficient speed to induce cavitation in the slurry, and separating means for extracting a liquid containing water and hydrocarbons from the slurry and a separate liquid outlet for the extracted liquid.

The double lift pipe catalytic cracking process and apparatus for modifying inferior petrol in petroleum processing aims at reducing the olefin content and sulfur content in petrol greatly. The present invention features that inferior petrol material after contacting with the regenerated catalyst is first upstream reacted in the first reaction area in the petrol lift pipe reactor and then further flowed upwards to diameter expanding structure bed layer reactor in the upper part of the petrol lift pipe reactor for mixing with the catalyst, which is fed through the catalyst conveying pipe and water steam stripped in the stripping section of the second depositor, and reacting. The present invention is used mainly for modifying inferior petrol and can reduce greatly the olefin content and sulfur content in petrol simultaneously. The present invention also discloses relevant double lift pipe catalytic cracking apparatus.

A spark-ignition engine capable of reducing the content of hydrocarbon in exhaust gas is provided. When viewed from a direction parallel to a cylinder center axis, given a central virtual line passing a squish area maximum-width section and the center of a combustion chamber recessed section, and one area a and the other area b divided by the central virtual line, an intake valve port or an exhaust valve port is opened in one area of any opposed section of opposed sections of the combustion chamber recessed section. A spark-plug attachment hole is formed in the other area of the opposed section, such that, when viewed from the direction parallel to the cylinder center axis, a spark discharge section at a tip of a spark plug does not overlap the central virtual line.

The present invention provides a composition comprising 10-40 mass! of C8-30 linear alkanes, up to 20 mass % of C7-20 aromatic hydrocarbons, at least 90 mass % of which are monoaromatic, and no more than 1 massl in total of oxygen containing compounds; wherein the total amount of C8-30 alkanes in the composition is 50-95 mass % (and the total amount of C8-30 alkanes, C7-20 aromatic hydrocarbons and C8-30 cycloalkanes is at least 95 massl; and wherein the amounts are based on the mass of the composition. Also provided is a method for producing the composition comprising the step of hydroprocessing a biological feedstock using a catalyst and the step of fractionating the product of the hydroprocessing step.

The invention discloses a hydrogenation method for enhancing cetane number of inferior diesel. The method comprises the following steps: (1) sufficiently mixing the inferior diesel raw material and a powdery hydrofining catalyst in a mixer to obtain a catalyst-raw oil feed mixture; (2) adding the feed mixture and hydrogen into an ebullated bed reactor from the reactor bottom filled with a mixture of a hydrodefreezing catalyst and a hydrogenation modification catalyst, and carrying out hydrogenation reaction; (3) discharging the reaction stream containing the powdery hydrofining catalyst out of the top of the ebullated bed reactor into a stable reactor, and carrying out supplementary hydrofining; and (4) carrying out solid-liquid separation on the material obtained in the step (3), and sending the liquid phase into a fractionating system to obtain the high-quality low-pour-point low-sulfur high-cetane-number diesel product. The method reasonably combines the temperature drop in the hydrodefreezing process and the temperature rise in the hydrogenation modification process, thereby lowering the low-pour-point high-cetane-number diesel, lowering the hot-spot temperature of the device and prolonging the operating cycle on the premise of ensuring the high diesel yield.

The invention discloses a production method of low-freezing-point diesel. The production method comprises the following steps: (1) completely mixing low-quality diesel raw materials and a powdered Mo-Ni type hydrorefining catalyst in a mixer to obtain mixed feeding materials of the catalyst and the raw material oil; (2) enabling the mixed feeding materials and hydrogen to enter a boiling-bed reactor from the bottom of the reactor to perform hydrogenation reaction, wherein the reactor is filled with a hydrodewaxing catalyst and a Mo-Co type hydrorefining catalyst; (3) discharging material flow containing the powdered Mo-Ni type hydrorefining catalyst after the reaction out of the top of the boiling-bed reactor and entering a stabilized reactor to perform hydrofinishing; and (4) performing solid-liquid separation on the material obtained in the step (3) and enabling liquid phase to enter a fractionating system to obtain the low-freezing-point diesel product. By the method provided by the invention, the temperature reduction in the hydrodewaxing process and the temperature increment in the hydrogenation process are combined and utilized reasonably, so while the low-freezing-point and ultralow-sulfur diesel is produced, the hot-spot temperature of the device is reduced, the operating cycle is prolonged and the operating cost is saved.

The invention discloses an efficient hydro-upgrading method for poor diesel fuel. The method comprises the following steps of (1) fully mixing the raw material of poor diesel fuel and a powdery hydrorefining catalyst in a mixer to obtain a mixed feeding material; (2) enabling the mixed feeding material and hydrogen to enter a boiling-bed reactor from the bottom part of a reactor filled with a hydrodewaxing catalyst, a hydro-upgrading catalyst and an isomerization-visbreaking catalyst, so as to implement the hydrogenation reaction; (3) discharging the reaction product comprising the powdery hydrorefining catalyst from the top part of the boiling-bed reactor, enabling the reaction product to enter the stable reactor to supplement hydrorefining; and (4) implementing solid liquid separation on the material, and enabling the liquid phase to enter a fractionating system to obtain a high-quality diesel fuel product. The characteristic of backmixing of the boiling-bed reactor is fully utilized, the temperature drop in the process of hydrodewaxing and the temperature rise in the processes of hydrorefining and hydro-conversion are reasonably utilized, the diesel fuel with low condensation point, ultralow sulfur and high cetane number is produced while the high yield of the diesel fuel is guaranteed, the hot-spot temperature of the device is reduced, and the running period is prolonged.

The invention discloses a production method of high-quality low-pour-point diesel. The production method comprises the following steps: (1) adequately mixing a poor-quality diesel raw material with a powdery hydrorefining catalyst in a mixer, so as to obtain a mixed fed material of the catalyst and the raw material diesel; (2) introducing the mixed fed material and hydrogen into a boiling-bed reactor from the bottom of a reactor filled with a hydrodewaxing catalyst, and carrying out hydrogenation reaction; (3) after the reaction of the material containing the powdery hydrorefining catalyst, discharging the material from the top of the boiling-bed reactor, introducing the material into a stable reactor, and carrying out supplementary hydrorefining; and (4) filtering the powdery hydrorefining catalyst from generated diesel, and introducing the diesel into a fractionating system, so as to obtain the high-quality low-pour-point diesel product. By virtue of the method, the yield and cetane number of the diesel are increased when low-pour-point and ultralow-sulfur diesel is produced, the hot-spot temperature of a device is reduced, and the operation cycle is prolonged; and besides, the consumption of cold hydrogen or the fuel gas of a heating furnace is reduced, so that the operation cost is saved.

The present application provides a system and method for recombination of petroleum sludge through synchronized catalysis and cracking, comprising: performing catalysis and cracking on petroleum sludge in a first reaction still, so as to form petroleum gas discharged from the top of the first reaction still and carbon residues deposited in the first reaction still; inputting the petroleum gas into a first dedusting catalytic tower stored with a recombination catalyst; condensing the petroleum gas after catalytic recombination in the first dedusting catalytic tower to form a petroleum-water mixture; separating the petroleum-water mixture by a petroleum-water separation device, and conveying the separated petroleum to a second reaction still to perform secondary cracking and form mixed petroleum gas; and performing dedusting and catalytic recombination on the mixed petroleum gas, condensing the mixed petroleum gas after catalytic recombination to form mixed oil, filtering the mixed petroleum and then performing distillation separation. The present application realizes the recycle of such resources as water, petroleum and combustible gas in petroleum sludge, thereby achieving resource re-utilization and restoring the use value of the original soil.